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Integrated Circuit Systems, Inc.
ICS932S202
Frequency Timing Generator for Differential PIII Type Dual-CPU Systems
Recommended Application: Serverwork HE-T, HE-SL & LE-T Chipsets Output Features: * 2 - CPUs @ 2.5V, up to 180MHz * 2 - CPU chipset @ 2.5V, up to 180MHz * 3 - IOAPIC @ 2.5V * 3 - 3V66MHz @ 3.3V * 11 - PCIs @ 3.3V * 1 - 48MHz, @ 3.3V fixed * 1 - 24/48MHz, @ 3.3V * 2 - REF @ 3.3V Features: * Up to 180MHz frequency support * * * * Support power management: Power down Mode from I2C programming. Spread spectrum for EMI control 0.25% center spread). Uses external 14.318MHz crystal 5 - FS pins for frequency select Key Specifications: * CPU Output Jitter: <150ps * * * * * * * * * * IOAPIC Output Jitter: <500ps 48MHz, 3V66, PCI Output Jitter: <500ps Ref Output Jitter. <1000ps CPU Output Skew: <175ps IOAPIC Output Skew <250ps PCI Output Skew: <500ps 3V66 Output Skew <250ps CPU to 3V66 Output Offset: 0.8 - 1.8ns (typ = 1.3ns) CPU to PCI Output Offset: 0.0 - 1.5ns (typ = 0.9ns) CPU to IOAPIC Output Offset: 1.5 - 4.0ns (typ = 2.0ns)
Block Diagram
PLL2 /2 X1 X2 XTAL OSC PLL1 Spread Spectrum 48MHz 24_48MHz
Pin Configuration
GNDREF REF0 *SEL24_48#/REF1 VDDREF X1 X2 GNDPCI *FS0/PCICLK0 *FS1/PCICLK1 VDDPCI *FS2/PCICLK2 *FS3/PCICLK3 GNDPCI PCICLK4 PCICLK5 VDDPCI PCICLK6 PCICLK7 GNDPCI PCICLK8 PCICLK9 PCICLK10 VDDPCI PD# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 VDDLAPIC IOAPIC0 IOAPIC1 GNDLAPIC IOAPIC2 VDDLCPU CPUCLK0 GNDLCPU CPUCLK1 VDDLCPU CPU_CSCLK0 CPU_CSCLK1 GNDLCPU VDD66 3V66_0 3V66_1 3V66_2 GND66 SDATA SCLK VDD48 48MHz/FS4* 24_48MHz GND48
REF (1:0)
CPU DIVDER
CPUCLK (1:0) CPU_CSCLK (1:0)
IOAPIC DIVDER
IOAPIC (2:0)
SEL24_48# SDATA SCLK FS (4:0) PD#
Control Logic Config. Reg.
PCI DIVDER
PCICLK (10:0)
3V66 DIVDER
3V66 (2:0)
48-pin SSOP
*120K ohm pull-up to VDD on indicated inputs.
0600A--08/04/03
ICS932S202
ICS932S202
General Description
The ICS932S202 is a main clock synthesizer chip for Pentium II based systems using Rambus Interface DRAMs. This chip provides all the clocks required for such a system. Spread Spectrum may be enabled through I2C. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS932S202 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.
Pin Descriptions
Pin number Pin name 1, 7, 13, 19, 25, GND 31, 36, 41, 45 2 REF0 REF1 3 SEL24_48 4, 10, 16, 23, VDD 28, 35 5 X1 6 X2 PCICLK0 8 FS0 PCICLK1 9 FS1 PCICLK2 11 FS2 PCICLK3 12 FS3 22, 21, 20, 18, PCICLK (10:4) 17, 15, 14 24 26 27 29 30 34, 33, 32 38, 37 40, 42 39, 43 44, 46, 47 48
0600A--08/04/03
Type PWR OUT OUT IN PWR IN OUT OUT IN OUT IN OUT IN OUT IN OUT IN OUT OUT/IN IN IN I/O OUT OUT OUT PWR OUT PWR Ground pins
Description
14.318MHz reference clock outputs at 3.3V 14.318MHz reference clock outputs at 3.3V Logic input to select 24 or 48MHz for pin 26 output Power pins 3.3V XTAL_IN 14.318MHz crystal input XTAL_OUT Crystal output PCI clock output at 3.3V. Synchronous to CPU clocks. Logic - input for frequency selection PCI clock output at 3.3V. Synchronous to CPU clocks. Logic - input for frequency selection PCI clock output at 3.3V. Synchronous to CPU clocks. Logic - input for frequency selection PCI clock output at 3.3V. Synchronous to CPU clocks. Logic - input for frequency selection PCI clock outputs at 3.3V. Synchronous to CPU clocks. This asynchronous input powers down the chip when drive active(Low). The internal PLLs are disabled and all the output clocks are held at a Low state. 24 or 48MHz output selectable by SEL24_48# (0=48MHz 1=24MHz) Fixed 48MHz clock output. 3.3V Logic - input for frequency selection Clock input of I2C input Data pin for I2C circuitry 5V tolerant 3.3V clock outputs. These outputs are stopped when CPU_STOP# is driven active.. Chipset clock outputs @ 2.5V CPU clock outputs @ 2.5V. Power pins for CPUCLKs. 2.5V IOAPIC clocks @ 2.5V. Synchronous with CPUCLKs. Power pin for the IOAPIC outputs. 2.5V.
PD# 24_48MHz 48MHz FS4 SCLK SDATA 3V66 (2:0) CPU_CSCLK (1:0) CPUCLK (1:0) VDDLCPU IOAPIC (2:0) VDDLAPIC
2
ICS932S202
Functionality
FS4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 FS3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 FS2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 FS1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 FS0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 CPU 103.0 100.0 100.45 100.9 107.1 109.0 112.0 114.00 116.00 118.00 133.30 120.00 122.00 125.00 50.0 66.7 133.3 133.9 138.0 142.0 146.0 150.0 153.0 156.0 159.1 162.0 166.7 168.0 171.0 174.0 177.0 180.0 PCI 34.33 33.33 33.48 33.63 35.70 36.33 37.33 28.50 29.00 29.50 33.33 30.00 30.50 31.25 16.67 16.67 33.33 33.48 34.50 35.50 36.50 37.50 38.25 39.00 39.78 40.50 41.67 42.00 42.75 43.50 44.25 45.00 3V66 68.67 66.67 66.97 67.27 71.40 72.67 74.67 57.00 58.00 59.00 66.65 60.00 61.00 62.50 33.33 33.33 66.67 66.95 69.00 71.00 73.00 75.00 76.50 78.00 79.55 81.00 83.33 84.00 85.50 87.00 88.50 90.00 IOAPIC 17.17 16.67 16.74 16.82 17.85 18.17 18.67 14.25 14.50 14.75 16.66 15.00 15.25 15.63 8.33 8.33 16.67 16.74 17.25 17.75 18.25 18.75 19.13 19.50 19.89 20.25 20.83 21.00 21.38 21.75 22.13 22.50
0600A--08/04/03
3
ICS932S202
Serial Configuration Command Bitmap
Byte 0: Functionality and frequency select register (Default = 0)
Bit Bit 2 FS4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit 7 FS3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit 6 FS2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit 5 FS1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Description Bit 4 CPU FS0 0 103.0 1 100.0 0 100.45 1 100.9 0 107.1 1 109.0 0 112.0 1 114.00 0 116.00 1 118.00 0 133.30 1 120.00 0 122.00 1 125.00 0 50.0 1 66.7 0 133.3 1 133.9 0 138.0 1 142.0 0 146.0 1 150.0 0 153.0 1 156.0 0 159.1 1 162.0 0 166.7 1 168.0 0 171.0 1 174.0 0 177.0 1 180.0 PWD PCI 34.33 33.33 33.48 33.63 35.70 36.33 37.33 28.50 29.00 29.50 33.33 30.00 30.50 31.25 16.67 16.67 33.33 33.48 34.50 35.50 36.50 37.50 38.25 39.00 39.78 40.50 41.67 42.00 42.75 43.50 44.25 45.00 3V66 68.67 66.67 66.97 67.27 71.40 72.67 74.67 57.00 58.00 59.00 66.65 60.00 61.00 62.50 33.33 33.33 66.67 66.95 69.00 71.00 73.00 75.00 76.50 78.00 79.55 81.00 83.33 84.00 85.50 87.00 88.50 90.00 IOAPIC 17.17 16.67 16.74 16.82 17.85 18.17 18.67 14.25 14.50 14.75 16.66 15.00 15.25 15.63 8.33 8.33 16.67 16.74 17.25 17.75 18.25 18.75 19.13 19.50 19.89 20.25 20.83 21.00 21.38 21.75 22.13 22.50
Bit (2, 7:4)
Reser ved Note 1
Bit 3 Bit 1 Bit 0
0 - Frequency is selected by hardware select, latched inputs 1 - Frequency is selected by Bit 2, 7:4 0 - Normal 1 - Spread spectrum enabled 0 - Running 1 - Tristate all outputs
0 1 0
Note 1: Default at power-up will be for latched logic inputs to define frequency, as displayed byBit 3.
0600A--08/04/03
4
ICS932S202
Byte 1: CPU, Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 40 38 37 42 47 46 44 PWD 1 1 1 1 1 1 1 X Description CPUCLK 1 CPUCSCLK0 CPUCSCLK1 CPUCLK 0 IOAPIC0 IOAPIC1 IOAPIC2 (Reserved)
Byte 2: PCI Active/Inactive Register (1 = enable, 0 = disable)
Bit Pin # PWD Description
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
Bit 7 18 1 PCICLK7 Bit 6 17 1 PCICLK6 Bit 5 15 1 PCICLK5 Bit 4 14 1 PCICLK4 Bit 3 12 1 PCICLK3 Bit 2 11 1 PCICLK2 Bit 1 9 1 PCICLK1 Bit 0 8 1 PCICLK0 Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
Byte 3: 3V66 Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 34 33 32 2 3 PWD 1 1 1 X 1 1 X X Description 3V66_0 3V66_1 3V66_2 FS1# REF0 REF1 FS3# FS2#
Byte 4: PCI Active/Inactive Register (1 = enable, 0 = disable)
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Pin # 26 27 22 21 20 PWD 1 1 X 1 1 1 1 X Description 24_48MHz 48MHz FS0# (Reserved) PCICLK10 PCICLK9 PCICLK8 FS4#
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
Byte 5: Active/Inactive Register (1= enable, 0 = disable)
Bit Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Pin # PWD 1 1 1 1 1 1 1 1 Description R e s e r ve d ( N o t e ) R e s e r ve d ( N o t e ) R e s e r ve d ( N o t e ) R e s e r ve d ( N o t e ) R e s e r ve d ( N o t e ) R e s e r ve d ( N o t e ) R e s e r ve d ( N o t e ) R e s e r ve d ( N o t e )
Byte6: Active/Inactive Register (1= enable, 0 = disable)
Bit Pin # PWD Description
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
-
0 0 0 0 0 1 1 0
R e s e r ve d R e s e r ve d R e s e r ve d R e s e r ve d R e s e r ve d R e s e r ve d R e s e r ve d R e s e r ve d
(Note) (Note) (Note) (Note) (Note) (Note) (Note) (Note)
Notes: 1. Inactive means outputs are held LOW and are disabled from switching.
0600A--08/04/03
Note: Don't write into this register, writing into this register can cause malfunction
5
ICS932S202
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . Ambient Operating Temperature . . . . . . . . . . Storage Temperature . . . . . . . . . . . . . . . . . . . Case Temperature . . . . . . . . . . . . . . . . . . . . . 5.5 V GND -0.5 V to VDD +0.5 V 0C to +70C -65C to +150C 115C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.
Electrical Characteristics - Input/Supply/Common Output Parameters
TA = 0 - 70C; VDD = VDDL = 3.3 V +/-5% (unless otherwise stated) PARAMETER SYMBOL CONDITIONS VIH Input High Voltage VIL Input Low Voltage VIN = VDD IIH Input High Current VIN = 0V; Inputs with no pull-up IIL1 Input Low Current resistors VIN = 0V; Inputs with pull-up IIL2 Input Low Current resistors IDD3.3OP100 Operating Supply Current IDD3.3OP133 Powerdown Current Input Frequency IDD3.3PD Fi CIN CINX CL = 30 pF; Select @ 133 MHz 11 27 143 220 14.318 160 600 16 5 45 3 3 3 mA A MHz pF pF ms ms ms CL =30 pF; PWRDWN#=0 VDD = 3.3 V Logic Inputs 1 Input Capacitance X1 & X2 pins To 1st crossing of target 1 Ttrans Transition time frequency From 1st crossing to 1 % target 1 Ts Settling Time frequency. From VDD = 3.3 V to 1% target 1 TSTAB Clk Stabilization frequency 1 Guaranteed by design, not 100% tested in production. CL = 30 pF; Select @ 100 MHz MIN 2 VSS - 0.3 -5 -200 137 160 TYP MAX UNITS VDD + 0.3 V 0.8 V 5 A A A mA
Electrical Characteristics - Input/Supply/Common Output Parameters
TA = 0 - 70C; VDD = 3.3 V +/- 5%, VDDL = 2.5V +/- 5% (unless otherwise stated). PARAMETER SYMBOL CONDITIONS CL = 30 pF; Select @ 100 MHz IDD2.5OP100 Operating Supply Current IDD2.5OP133 CL = 30 pF; Select @ 133 MHz CL = 30 pF; PWRDWN# = 0 IDD2.5PD Power Down Supply Current MIN TYP 34 58 3 MAX 75 90 100 UNITS mA mA mA
0600A--08/04/03
6
ICS932S202
Group Offset
Group Offset Measurement Loads Measure Points CPU to 3V66 0.8 to 1.8ns CPU leads CPU @ 20pF, 3V66 @ 30pF CPU @1.25V, 3V66 @ 1.5V CPU to PCI 0 to 1.5ns CPU leads CPU @ 20pF, PCI @ 30pF CPU @ 1.25V, PCI @ 1.5V CPU to IOAPIC 1.5 to 4.0ns CPU leads CPU @ 20pF, IOAPIC @ 20pF CPU @ 1.25V, IOAPIC @ 1.25V Note: 1. All offsets are to be measured at rising edges.
Electrical Characteristics - CPUCLK
TA = 0 - 70C; VDD = 3.3 V +/-5%, VDDL = 2.5V +/- 5 %; CL = 20 pF (unless otherwise stated). PARAMETER SYMBOL CONDITIONS MIN TYP IOH = -12 mA 2 2.3 Output High Voltage VOH2B IOL = 12 mA 0.3 Output Low Voltage VOL2B IOH2B VOH = 1.7 V -35 Output High Current IOL2B VOL = 0.7 V 19 26 Output Low Current 1 VOL = 0.4 V, VOH = 2.0 V 0.4 0.73 Rise Time tr2B 1 VOH = 2.0 V, VOL = 0.4 V 0.4 0.76 Fall Time tf2B 1 VT = 1.25 V 45 50.6 Duty Cycle dt2B -2 Cpu0:1 VT=1.25 to 1.5V @ all frequency CPU0:3 VT=1.25 to 1.5V @ 66MHz 140 Skew VT=1.25 to 1.5V @ 100MHz 165 VT=1.25 to 1.5V @ 133MHz 155 VT=1.25 to 1.5V @ 200MHz 70 1 VT = 1.25 V tjcyc-cyc2B 108 Jitter, Cycle-to-cycle
1
MAX 0.4 -19 0.9 0.9 55 175 175 175 175 175 250
UNITS V V mA mA ns ns % ps ps ps ps ps ps
Guaranteed by design, not 100% tested in production.
0600A--08/04/03
7
ICS932S202
Electrical Characteristics - 3V66
TA = 0 - 70C; VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5%; CL = 30 pF (unless otherwise stated) PARAMETER SYMBOL CONDITIONS MIN TYP Output High Voltage VOH1 IOH = -25 mA 2.4 2.9 Output Low Voltage VOL1 IOL = 20 mA 0.32 Output High Current IOH1 VOH = 2.0 V -73 Output Low Current IOL1 VOL = 0.8 V 41 50 1 Rise Time Tr VOL = 0.4 V, VOH = 2.4 V 0.5 1.31 1 Fall Time Tf VOH = 2.4 V, VOL = 0.4 V 0.5 1.39 1 Duty Cycle Dt VT = 1.5 V 45 49 1 VT = 1.5 V 85 Skew Tsk1 1 VT = 1.5 V tjcyc-cyc1 163 Jitter, Cycle-to-cycle
1
MAX 0.4 -40 2 2 55 250 500
UNITS V V mA mA ns ns % ps ps
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - PCICLK
TA = 0 - 70C; VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5%; CL = 30 pF (unless otherwise stated) PARAMETER SYMBOL CONDITIONS MIN TYP Output High Voltage VOH1 IOH = -11 mA 2.4 3.1 IOL = 9.4 mA 0.17 Output Low Voltage VOL1 VOH = 2.0 V -62 Output High Current IOH1 VOL = 0.8 V 25 45 Output Low Current IOL1 1 Rise Time tr1 VOL = 0.4 V, VOH = 2.4 V 0.5 1.42 1 Fall Time tf1 VOH = 2.4 V, VOL = 0.4 V 0.5 1.54 1 Duty Cycle dt1 VT = 1.5 V 45 50.8 tsk1 VT = 1.5 V 266 Skew 1 Jitter, Cycle-to-cycle tjcyc-cyc1 VT = 1.5 V 133
1
MAX 0.4 -22 2.5 2.5 55 500 500
UNITS V V mA mA ns ns % ps ps
Guaranteed by design, not 100% tested in production.
0600A--08/04/03
8
ICS932S202
Electrical Characteristics - 24MHz, 48MHz
TA = 0 - 70C; VDD = 3.3 V +/- 5%, VDDL = 2.5 V +/- 5 %; CL = 20 pF (unless otherwise stated). PARAMETER SYMBOL CONDITIONS IOH = -12 mA Output High Voltage VOH5 Output Low Voltage VOL5 IOL = 9 mA IOH5 VOH = 2.0 V Output High Current IOL5 VOL = 0.8 V Output Low Current 1 Rise Time tr5 VOL = 0.4 V, VOH = 2.4 V 1 Fall Time tf5 VOH = 2.4V, VOL = 0.4 V 1 VT = 1.5 V Duty Cycle dt5 1 VT = 1.5 V tjcyc-cyc5 Jitter, Cycle-to-Cycle
1
MIN 2.6
16
45
TYP 2.9 0.3 -27 22 1.9 2.10 50.9 303
MAX 0.4 -22 4 4 55 500
UNITS V V mA mA ns ns % ps
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - REF
TA = 0 - 70C; VDD = 3.3 V +/- 5%, VDDL = 2.5 V +/- 5 %; CL = 20 pF (unless otherwise stated). PARAMETER SYMBOL CONDITIONS MIN IOH = -12 mA 2.6 Output High Voltage VOH5 IOL = 9 mA Output Low Voltage VOL5 IOH5 VOH = 2.0 V Output High Current IOL5 VOL = 0.8 V 16 Output Low Current 1 VOL = 0.4 V, VOH = 2.4 V Rise Time tr5 1 Fall Time tf5 VOH = 2.4V, VOL = 0.4 V 1 Duty Cycle dt5 VT = 1.5 V 45 1 tjcyc-cyc5 VT = 1.5 V Jitter, Cycle-to-Cycle
1
TYP 2.9 0.3 -27 22 1.9 2.00 52.6 850
MAX 0.4 -22 4 4 55 1000
UNITS V V mA mA ns ns % ps
Guaranteed by design, not 100% tested in production.
0600A--08/04/03
9
ICS932S202
Electrical Characteristics - CPU_CSCLK
TA = 0 - 70C; VDD = 3.3 V +/-5%, VDDL = 2.5V +/- 5 %; CL = 20 pF (unless otherwise stated). PARAMETER SYMBOL CONDITIONS MIN TYP IOH = -12 mA 2 2.3 Output High Voltage VOH2B IOL = 12 mA 0.3 Output Low Voltage VOL2B IOH2B VOH = 1.7 V -35 Output High Current IOL2B VOL = 0.7 V 19 26 Output Low Current 1 VOL = 0.4 V, VOH = 2.0 V 0.4 0.9 Rise Time tr2B 1 VOH = 2.0 V, VOL = 0.4 V 0.4 0.8 Fall Time tf2B 1 VT = 1.25 V 45 54 Duty Cycle dt2B 34 Cpu_CS0:1 VT=1.25 to 1.5V @ all frequency Skew 1 tjcyc-cyc2B VT = 1.25 V Jitter, Cycle-to-cycle 119
1
MAX 0.4 -19 1.6 1.6 55 175 250
UNITS V V mA mA ns ns % ps ps
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - IOAPIC
TA = 0 - 70C; VDD = 3.3 V +/-5%, VDDL = 2.5 V +/-5%; CL = 20 pF (unless otherwise stated) PARAMETER SYMBOL CONDITIONS MIN TYP Output High Voltage VOH4B IOH = -12.0 mA 2 2.3 Output Low Voltage VOL4B IOL = 12 mA 0.31 Output High Current IOH4B VOH = 1.7 V -33 Output Low Current IOL4B VOL = 0.7 V 19 27 1 Rise Time tr4B VOL = 0.4 V, VOH = 2.0 V 0.5 1.8 1 Fall Time tf4B VOH = 2.0 V, VOL = 0.4 V 0.5 1.8 1 Duty Cycle dt4B VT = 1.25 V 45 49.3 1 tsk4B VT = 1.25 V 95 Skew 1 VT = 1.25 V tjcyc-cyc4B 112 Jitter, Cycle-to-cycle
1
MAX 0.4 -19 2 2 55 250 500
UNITS V V mA mA ns ns % ps
Guaranteed by design, not 100% tested in production.
0600A--08/04/03
10
ICS932S202
Power Management Features:
PD# 0 1 CPUCLK IOAPIC LOW ON LOW ON 3V66 LOW ON PCI LOW ON PCI_F LOW ON REF. 48MHz LOW ON Osc OFF ON VCOs OFF ON
Note: 1. LOW means outputs held static LOW as per latency requirement next page. 2. On means active. 3. PD# pulled Low, impacts all outputs including REF and 48 MHz outputs.
Power Management Requirements:
Latency Signal Signal State 1 (normal operation) 0 (power down) No. of rising edges of PCICLK 3mS 2max.
PD#
Note: 1. Clock on/off latency is defined in the number of rising edges of free running PCICLKs between the clock disable goes low/high to the first valid clock comes out of the device. 2. Power up latency is when PWR_DWN# goes inactive (high to when the first valid clocks are dirven from the device.
0600A--08/04/03
11
ICS932S202
General I2C serial interface information
The information in this section assumes familiarity with I2C programming. For more information, contact ICS for an I2C programming application note.
How to Write:
Controller (host) sends a start bit. Controller (host) sends the write address D2 (H) ICS clock will acknowledge Controller (host) sends a dummy command code ICS clock will acknowledge Controller (host) sends a dummy byte count ICS clock will acknowledge Controller (host) starts sending first byte (Byte 0) through byte 5 * ICS clock will acknowledge each byte one at a time. * Controller (host) sends a Stop bit * * * * * * * *
How to Read:
* * * * * * * * Controller (host) will send start bit. Controller (host) sends the read address D3 (H) ICS clock will acknowledge ICS clock will send the byte count Controller (host) acknowledges ICS clock sends first byte (Byte 0) through byte 5 Controller (host) will need to acknowledge each byte Controller (host) will send a stop bit
How to Write:
Controller (Host) Start Bit Address D2(H) Dummy Command Code ICS (Slave/Receiver)
How to Read:
Controller (Host) Start Bit Address D3(H) ICS (Slave/Receiver)
ACK ACK
Dummy Byte Count
ACK Byte Count
ACK
ACK
Byte 0
Byte 0
ACK
Byte 1
ACK
Byte 1
ACK
Byte 2
ACK
Byte 2
ACK
Byte 3
ACK
Byte 3
ACK
Byte 4
ACK
Byte 4
ACK
Byte 5
ACK
Byte 5
ACK
Stop Bit
ACK Stop Bit
Notes:
1. 2. 3. 4. 5.
6.
The ICS clock generator is a slave/receiver, I2C component. It can read back the data stored in the latches for verification. Read-Back will support Intel PIIX4 "Block-Read" protocol. The data transfer rate supported by this clock generator is 100K bits/sec or less (standard mode) The input is operating at 3.3V logic levels. The data byte format is 8 bit bytes. To simplify the clock generator I2C interface, the protocol is set to use only "Block-Writes" from the controller. The bytes must be accessed in sequential order from lowest to highest byte with the ability to stop after any complete byte has been transferred. The Command code and Byte count shown above must be sent, but the data is ignored for those two bytes. The data is loaded until a Stop sequence is issued. At power-on, all registers are set to a default condition, as shown.
0600A--08/04/03
12
ICS932S202
PD# Timing Diagram
The power down selection is used to put the part into a very low power state without turning off the power to the part. PD# is an asynchronous active low input. This signal needs to be synchronized internal to the device prior to powering down the clock synthesizer. Internal clocks are not running after the device is put in power down. When PD# is active low all clocks need to be driven to a low value and held prior to turning off the VCOs and crystal. The power up latency needs to be less than 3 mS. The power down latency should be as short as possible but conforming to the sequence requirements shown below. The REF and 48MHz clocks are expected to be stopped in the LOW state as soon as possible. Due to the state of the internal logic, stopping and holding the REF clock outputs in the LOW state may require more than one clock cycle to complete.
PD#
CPUCLK 3V66 PCICLK VCO Crystal
Notes: 1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS932S202device). 2. As shown, the outputs Stop Low on the next falling edge after PD# goes low. 3. PD# is an asynchronous input and metastable conditions may exist. This signal is synchronized inside this part. 4. The shaded sections on the VCO and the Crystal signals indicate an active clock. 5. Diagrams shown with respect to 133MHz. Similar operation when CPU is 100MHz.
0600A--08/04/03
13
ICS932S202
N
c
300 mil SSOP SYMBOL
L
INDEX AREA
E1
E
12 D h x 45
A A1 b c D E E1 e h L N a VARIATIONS
In Millimeters COMMON DIMENSIONS MIN MAX 2.41 2.80 0.20 0.40 0.20 0.34 0.13 0.25 SEE VARIATIONS 10.03 10.68 7.40 7.60 0.635 BASIC 0.38 0.64 0.50 1.02 SEE VARIATIONS 0 8
In Inches COMMON DIMENSIONS MIN MAX .095 .110 .008 .016 .008 .0135 .005 .010 SEE VARIATIONS .395 .420 .291 .299 0.025 BASIC .015 .025 .020 .040 SEE VARIATIONS 0 8
A A1
N 48
D mm. MIN 15.75 MAX 16.00 MIN .620
D (inch) MAX .630
-Ce
b SEATING PLANE .10 (.004) C
Reference Doc.: JEDEC Publication 95, MO-118
10-0034
Ordering Information
ICS93S202yFT
Example:
ICS XXXX y F - T
Designation for tape and reel packaging Package Type F = SSOP
Revision Designator (will not correlate with datasheet revision)
Device Type (consists of 3 or 4 digit numbers) Prefix ICS, AV = Standard Device
0600A--08/04/03
14

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Price & Availability of ICS932S202

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