726 fibre channel gbaud optical link module technical data HGLM-1063 features ? ansi x3.230-1994 fibre channel standard compatible (fc-0) ? fcsi-301-rev 1.0 gbaud link module specification compatible ? standard 20 bit (1063 mbd), ttl interface ? class i laser safety certified ? single +5.0 v power supply applications ? mass storage system i/o channel ? computer system i/o channel ? high speed peripheral interface description the HGLM-1063 gigabaud optical link module, provides a complete fibre channel fc-0 layer solution. the module meets the requirements of the 100-m5- sl-i physical link as defined by the american national standards institute (ansi) x3.230-1994 fibre channel standard. the HGLM-1063 is also compatible with the fibre channel systems initiative (fcsi) document #fcsi-301-rev 1.0 gigabaud optical link module specification. the HGLM-1063 transmits and receives 8b/10b encoded, parallel, data in the 20 bit wide format defined by the fcsi-301 document. the 20 bit wide data is transmitted at 100mb/sec over a serial fiber link and has the capability to receive data at 100 mb/sec simultaneously. with overhead, this translates to a serial line rate of 1062.5 mbaud transmitting and 1062.5 mbaud receiving. the serial data link uses a 780 nm laser transmitter and photodiode. the optimum fiber is 50/125 m m multimode fiber (62.5/125 m m multimode fiber can be used with degraded performance) and attaches to the HGLM-1063 via a duplex sc connector. as specified in the fibre channel standard, the HGLM-1063 is a class 1 laser safe device; the transmitted optical signal shuts down in the case of an open fiber condition after a specific time interval. the HGLM-1063 accomplishes this by monitoring the transmitted optical power levels, and the received optical signal. the HGLM-1063 is intended for use in building adapter cards (or equivalent devices) as shown in figure 1. the HGLM-1063 pro- vides complete fc-0 functionality. the hpfc-5000 provides the fc-1 through fc-4 functions and interfaces directly to the hglm- 1063. finally, a bus gasket is used to connect the hpfc-5000 to the specific system bus in use. this block diagram is meant only to illustrate the basic fibre channel functionality. for proper operation, it is necessary to connect the hglm- 1063 to another HGLM-1063 (or equivalent) in a full duplex configuration as depicted in figure 3. this ensures proper operation of the open fiber control circuitry and allows proper link startup and synchronization. 5964-6638e (4/96)
727 rx fiber HGLM-1063 gigabaud optical link module bus gasket system bus tx hpfc-5000 tachyon figure 1. example system adapter card, block diagram (simplified). functional description a simplified block diagram of the HGLM-1063 module is shown in figure 2. this block diagram shows the 5 key elements of the module. these are the transmit- ter i.c., the laser diode assembly, the receiver i.c., the photodiode assembly, and the open fiber control circuit. the high level of integration on the HGLM-1063 is apparent from this block diagram. pin assignments and signal definitions are given on pages 6 and 7. in general, the HGLM-1063 utilizes a user provided transmit byte clock (tbc) of 53.125 mhz to transmit two 8b/10b encoded data bytes, simultaneously, by creating a serial data stream of 1062.5 mbd and modulating a 780 nm laser diode with it. the 20 bit wide (two encoded bytes) data input is provided to the module through the 80 pin con- nector in standard ttl format. similarly, the HGLM-1063 receives 780 nm optical signals at a data rate of 1062.5 mbd, deserializes this data stream to recover the two encoded data bytes and provides this 20 bit wide standard ttl data to the receiving system via the 80 pin connector. the receiver also recovers the byte rate clock for use in clocking the received 20 bit wide parallel data. link acquisition and power up the following discussion assumes the HGLM-1063 is connected in a full duplex point to point link as shown in figure 3. when initially applying power to the hglm- 1063, the transmit byte clock must start no later than 5 msec after the +5 volt supply reaches the +4 volt level. if this require- ment is not met, the open fiber control (ofc) circuit may stick in a nonfunctional state. if this should happen, the ofc can be put into a functional state by holding the enable wrap (ewrap) line high for 10.5 seconds. once the tbc is running, and the module is properly powered up, the follow- ing sequence should be followed to bring the link into full synchronization and ready to transmit data: 1. both link unusable lines will be driven high, by the ofc, indicating neither receiver is detecting a signal from the link. 2. drive the transmit data lines, tx[00:19] to a 01010101010101010101. 3. drive the input control lines as follows: ? enable wrap: low ? tx_si: low ? enable comma detect: high ? -lock to reference: high 4. assuming the link is properly connected, and both link ends are in the same state of readiness, the lasers will turn on in 10.1 seconds. this will be indicated by the link unusable lines going low. this transition indicates the ofc is operational and in control. 5. once the lasers have come on, and link unusable is observed to transition low, bring -lock to reference low for at least 500 m sec. this forces the module to frequency lock to the transmit byte clock.
728 figure 2. HGLM-1063 functional block diagram. clock (tbc) tx rx encoded data clock (rbc[0:1]) encoded data rx tx clock (rbc[0:1]) encoded data clock (tbc) encoded data hglm1 hglm2 fiber path a fiber path b figure 3. full duplex point to point link. hdmp-1512 transmitter i.c. data byte 1 tx[10:19] data byte 0 tx[00:09] laser diode assembly data byte 0 rx[00:09] open fiber control i.c. tbc ?serial data in photodiode assembly ewrap tx_si hdmp-1514 receiver i.c. fiber input lol a, b en_cdet -lck_ref data byte 1 rx[10:19] com_det rbc[0:1] l_unuse fault ?serial data out fiber output fault -lzon figure 4. typical HGLM-1063 label. HGLM-1063 780 nm glm module cdrh21 cfr(j) compilant class 1 laser product 09 nov. 1995 san jose, ca h rx tx made in u.s.a. from domestic and foreign components.
729 6. after holding -lock to reference low for 500 m sec it should then be driven high. this causes the module to phase and frequency lock onto the incoming data stream within 2500 bit times (2.4 m sec). 7. after 2500 bit times, the modules should be in bit syn- chronization, but not yet byte synchronization. the receive byte clock (rbc0) should be running at 53.125 mhz. 8. finally, drive the data lines tx[00:19] with a k28.5 (comma or byte sync) character. upon detection of this character, the receiver will drive the comma detect line high, the clocks will align to the byte boundary, and the receive data lines (rx[00:19]) will have valid data. the link is now ready for data transmission. tx_si operation in normal operation, pin tx_si should be held low. in this mode, the data at tx[00:19] is serialized and driven over the fiber optic link. with pin tx_si driven high, however, the data at tx[00:19] is serialized and driven out the serial data out lines and the data applied to the serial data in lines are driven over the fiber optic link. ewrap operation to aid in link diagnostics, the modules have the capability of wrapping the local transmit data electrically back to the local deserializer. this feature is enabled by driving the ewrap pin high. when enabled, ewrap causes the laser to turn off within 20 m sec. the ofc circuit goes into its low duty cycle on-off-on handshake mode. the link will need to be stepped through the synchronization procedure outlined above to return to normal operation after ewrap is brought low. enable comma detect in the synchronization procedure above, the enable comma detect (en_cdet) signal is driven high to allow the receiver to reset and align its boundaries properly when a k28.5 character is transmitted. this line can be kept in a high state and the receiver will reset on every k28.5 character it detects. this feature can be disabled, after initial synchronization, by driving enable comma detect to a low state. open fiber control the purpose of the open fiber control (ofc) integrated circuit is to ensure user safety. this circuit uses the dual loss of light signals from the receiver i.c. and the laser fault detection signal from the transmitter i.c. to determine if the laser and the fiber link are properly connected and functioning normally. should a fault condition be determined, all laser transmission is shut down. a safety interlock is provided by the HGLM-1063 module. hglm- 1063 modules (or equivalent) must be connected in full point- to-point configuration as shown in figure 3 for proper operation. the open fiber control system (ofcs) of the HGLM-1063 deactivates the laser signal whenever there is an interruption or loss of signal of either laser drive circuit. for example, in figure 3, if path a is opened through a cut or other physical damage to the fiber, or if the fiber is discon- nected at either the transmitting port of hglm1 or the receiving port of hglm2, the ofcs detects the loss of signal. the link unusable line of hglm2 goes high, signaling the system of an open fiber condition. the ofcs then shuts down the laser of hglm2. hglm1 in turn detects this loss of signal, raises its link unusable line, and shuts down its laser. the ofc pulses the laser of hglm2 at a very low duty cycle. simultaneously, the ofcs of hglm1 detects the low duty cycle operation of hglm2 and places its laser in the same low duty cycle pulsing mode. it takes less than 2 msec to shut down all laser transmission and results in a safe (class i) laser emission level in path a, the open path. while path a is still open, hglm1 launches a pulse synchronously with the pulse it receives on path b from hglm2. however, hglm2 receives no pulse (because path a is open) and continues in an inactive mode. hglm2 will continue launching inquiry pulses once approximately every 10.1 seconds along path b. after path a is restored, hglm2 will receive pulses along path a, synchronous with its transmit pulses along path b. a completed link of path a and path b is verified by both hglm1 and hglm2. hglm2 will verify its link by deactivating its laser and confirm that its receive signal disappears. hglm1 also performs the same verification check, deactivating its laser. once both hglm modules have
730 deactivated their lasers, hglm2 then activates its laser, sends a signal to hglm1 (which activates its laser), which in turn sends a confirming signal back to hglm2. this on-off-on handshake confirms that the first syn- chronous pulse came from another HGLM-1063, or equivalent module, with an ofc safety system. once this sequence is complete, the link between hglm1 and hglm2 returns to normal operation, with both in the active mode. the on- off-on timing is compatible with the timing requirements of the ansi fc-ph specification for open fibre control timing of 100-m5-sl-i links. these timings are defined as decode 1, 2, and 3 and are given in the timing specifications table later in this document. laser safety compliance the HGLM-1063 is designed and certified as a class 1 laser product per 21 cfr (u.s. code of federal regulations), subchapter j. a class 1 laser product is safe for use and does not pose a biological hazard if used in accordance within the data sheet limits and instructions. caution: there are no user serviceable parts nor any maintenance required for the HGLM-1063. all adjustments are made at the factory before shipment to our customers. tampering with, modifying or breaking the preset trim pot seals will result in voided product warranty. it may also result in improper operation of the HGLM-1063 circuitry, and possible overstress of the laser source. device degrada- tion or product failure may result. connection of the HGLM-1063 to a non-approved optical source, operating above the recommended absolute maxi- mum conditions (especially power supply) or operating the HGLM-1063 in a manner inconsistent with its design and function may result in hazardous radiation exposure and may be considered an act of modifying or manufacturing a laser product. the person(s) performing such an act is required by law to recertify and reidentify the laser product under the provisions of 21 cfr(subchapter j). labeling each HGLM-1063 module is labeled per 21 cfr (subchapter j), including the actual date of manufacture (figure 4). figure 5. HGLM-1063 outline drawing. 3.5 (0.138) 30.8 (1.213) 37.8 (1.488) 5.0 (0.197) (2x) 1.25 (0.049) 11.0 (0.433) 11.5 (0.453) 24.13 (0.950) 35.25 (1.388) 74.27 (2.924) 63.53 (2.501) 28.35 (1.116) 27.0 (1.063) 4.8 (0.189) 2.5 mm diamond pin 2.0 (0.079) (2x) f receiver transmitter 25.4 (1.000) 2.0 (0.079) 28.0 (1.102) 30.0 (1.181) 2.5 (0.098) pin f bottom view dimensions in millimeters (inches).
731 HGLM-1063 pin assignments pin name pin name pin name pin name a01 +so b01 -so c01 gnd d01 +si a02 gnd b02 gnd c02 gnd d02 -si a03 v cc b03 tx[10] c03 tx[00] d03 v cc a04 tx[12] b04 tx[11] c04 tx[02] d04 tx[01] a05 tx[14] b05 tx[13] c05 tx[04] d05 tx[03] a06 tx[16] b06 tx[15] c06 tx[06] d06 tx[05] a07 tx[18] b07 tx[17] c07 tx[08] d07 tx[07] a08 gnd b08 tx[19] c08 tx[09] d08 gnd a09 strob_id b09 gnd c09 gnd d09 v cc a10 v cc b10 l_unuse c10 fault d10 tbc a11 par_id[1] b11 rsv c11 tx_si d11 par_id[0] a12 rbc[0] b12 ewrap c12 com_det d12 v cc a13 v cc b13 gnd c13 rsv d13 rbc[1] a14 gnd b14 rx[10] c14 rx[00] d14 gnd a15 rx[12] b15 rx[11] c15 rx[02] d15 rx[01] a16 rx[14] b16 rx[13] c16 rx[04] d16 rx[03] a17 rx[16] b17 rx[15] c17 rx[06] d17 rx[05] a18 rx[18] b18 rx[17] c18 rx[08] d18 rx[07] a19 v cc b19 rx[19] c19 rx[09] d19 v cc a20 en_cdet b20 gnd c20 gnd d20 -lck_ref figure 6. host pcb layout for mounting the HGLM-1063. 36.4 min. 30.2 max. r1.6 typ. socket a20 accomodates a pin spec'd f 0.46 ?0.05 0.2 m a b m c m f 24.13 28.85 min. 2.94 placement axis no electrical trace socket a01 accomodates a pin spec'd f 0.46 ?0.05 0.2 m a b m c m f f 2.65 ?0.08 0.13 m a b m f c a 1.6 ?0.25 4.8 max. f 2.65 ?0.08 b 24.5 min. 30 32 ?0.2 36.8 pitch 0.1 m a d f optical axis d (2x)64.27 min. 63.53 43.4 min. 37.2 max. (2x)3.35 min. (2x)2.6 min. 7.5 min. 4.8
732 HGLM-1063 signal definitions logic symbol signal name i/o level description tx[00:19] transmit data input ttl the 20-bit parallel transmit data to be serialized and sent to the transmitter. tbc transmit byte clock input ttl used to operate the state machines, derive the 20x serial clocks, and latch tx[00:19]. ewrap enable wrap/enable input ttl causes the serialized transmit data to electrically strop_id wrap back to the deserializer and disables the laser output. -lckref lock to reference input ttl causes the pll to lock to tbc. tx_si transmit si input ttl selects the serial data mode. en_cdet enable comma input ttl enables the comma detection circuitry to detect/strob_id clock establish byte synchronization on the next comma that is received. si serial data in input pecl a pair of differential signals for transmission of serial data. rx[00:19] receive data output ttl the 20 bit decoded received data from the receiver. rbc[0] receive byte clock 0 output ttl used by the system to latch rx[00:19]. rbc[1] receive byte clock 1 output ttl not normally used. com_det comma detect output ttl indicates byte synchronization has occurred. l_unuse link unusable output ttl indicates the link is currently not usable. fault fault output ttl indicates an electrical fault has been detected and turns the laser output off. so serial data out output pecl a pair of high speed differential signals representing the serialized data. par_id parallel id output ttl a 2 bit identification of the link rate. strob_id strobed id output ttl optional output used to access the serial strobed id information. not active. rsv reserved reserved for future use. absolute maximum ratings t c = 25 c, except as specified. operation in excess of any one of these conditions may result in permanent damage to this device. symbol parameter units min. max. v cc supply voltage v -0.5 6.0 v in,ttl ttl data input voltage v -0.7 v cc + 0.7 i o,ttl ttl output source current ma 13 t stg storage temperature c -40 +75 t op ambient operating temperature c 0 +60 rhop relative humidity operating % 8 80 rhst relative humidity storage % 5 95
733 dc electrical specifications t a = 10 c to +50 c, v cc = 4.5 v to 5.5 v symbol parameter unit min. typ. max. v ih,ttl ttl input high voltage level, guaranteed high signal for all inputs, i ih = 100 m av25 v il,ttl ttl input low voltage level, guaranteed low signal for all inputs, i il = -1 ma v 0 0.8 v oh,ttl ttl output high voltage level, i oh = 1 ma v 2.4 5 v ol,ttl ttl output low voltage level, i ol = -1 ma v 0 0.6 i cc v cc supply current ma 1200 v cc,noise peak to peak noise and ripple allowed on the v cc input mv 100 ac electrical specifications t a = 10 c to +50 c, v cc = 4.5 v to 5.5 v symbol parameter units min. typ. max. t r,ttlin input ttl rise time, 20% to 80% nsec 2 t f,ttlin input ttl fall time, 20% to 80% nsec 2 t r,ttlout output ttl rise time, 20% to 80%, 15 pf load nsec 2 4 t f,ttlout output ttl fall time, 20% to 80%, 15 pf load nsec 2 4 t r,rbc receive byte clock rise time, 0.8 v to 2.0 v, 15 pf load nsec 1.5 3.0 t f,rbc receive byte clock fall time, 2.0 v to 0.8 v, 15 pf load nsec 1.5 2.4 t r, bll bll rise time, ac coupled, 25 w source and load, 20% to 80% psec 150 350 t f,bll bll fall time, ac coupled, 25 w source and load, 20% to 80% psec 150 350 vswr i,h50 h50 input vswr, ac coupled, 50 w source and load 2.0 vswr o,bll bll output vswr, ac coupled, 50 w source and load 2.0 v ip,h50 input peak-to-peak differential voltage, ac coupled, 50 w load mv 50 1200 2000 v op,bll bll output peak-to-peak differential voltage, ac coupled, mv 1200 1400 2000 50 w load transmit byte clock requirements t a = 10 c to +50 c, v cc = 4.5 v to 5.5 v symbol parameter unit min. typ. max. f nominal frequency mhz 53.119 53.125 53.131 f tol frequency tolerance (for fibre channel compliance) ppm -100 +100 symm symmetry (duty cycle) % 40 60 jpe positive edge jitter ns 0.5 t r rise time, 20% to 80% nsec 4 t f fall time, 20% to 80% nsec 4
734 timing specifications t a = 10 c to +50 c, v cc = 4.5 v to 5.5 v symbol parameter units min. typ. max. t dcd_1 decode 1 time m sec 154 t dcd_2 decode 2 time m sec 617 t dcd_3 decode 3 time m sec 154 transmitter t s transmit data setup time nsec 2.0 t h transmit data hold time nsec 3.3 receiver t s receive data setup time nsec 2.5 t h receive data hold time nsec 6.0 optical specifications t a = 10 c to +50 c, v cc = 4.5 v to 5.5 v symbol parameter units min. typ. max. f op serial baud rate mbaud 1062.38 1062.5 1062.62 opb optical power budget db 6 8 optical extinction ratio db 6 pt transmitter launched optical power, average dbm -5.0 -2.5 1.3 p rx receiver input power, average, ber = 10 -12 dbm -13.0 1.3 rl receiver return loss db 12 l receiver operating wavelength nm 770 780 850 l c transmitter spectral center wavelength nm 770 790 795 dl transmitter spectral width, rms nm 4 rin 12 transmitter relative intensity noise db/hz -116 dj transmitter deterministic jitter, peak-peak % 20 transmitter eye opening, peak-peak, ber = 1e-12 % 57
735 ts tbc th data data data data data tx[00:19] figure 7. transmit byte clock and data timing relationships. ts th k28.5 data data rx[00:19] rbc0 ts th 18.8 ns com_det figure 8. receive timing relationships.
|
