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n-mos printer controller
?top view ?
UPD50HC-033 (1/2)
il11 27 p10 28 p11 29 p12 30 p13 31 p14 32 p15 33 p16 34 p17 21 p20 22 p21 23 p22 24 p23 12 db0 13 db1 14 db2 15 db3 16 db4 17 db5 18 db6 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21 t0 in
xtal1 in
xtal2 in
reset in
ss
int in
ea
db0 out
db1 out
db2 out
db3 out
db4 out
db5 out
db6 out
db7 out
nc
nc
nc
nc
gnd
t1 in
p26 out
p25 in
p24 in
p17 in
p16 in
p15 in
p14 in
p13 in
p12 in
p11 in
p10 in
vdd
p23 in
p22 in
p21 in
p20 in
v dd (+5 v)
nc
nc 35 p24 36 p25 1 t0 39 t1 2 xtal1 3 xtal2 5 ss 26 vdd 7 4 reset 6 int ea 19 db7 37 p26
UPD50HC-033 (2/2)
il11 column
setting print
pulse width
control
circuit 8 input
transistor
array
lb1256 tacho-generator
waveform
control circuit strobe 6 ready 37 feed 24 rst 35 +5 v
power
supply gnd +5 v mtp
character
series 27-34 print
data thermal
head
drive motor
control +5 v input
int
p10-p17
p20-p22
p23
p24
p25
reset
t0
t1
xtal1, xtal2
; strobe
; parallel data
; print column select
; printer paper feed
; error reset
; home sw
; reset
; tacho-generator
; oscillator for
pulse width setting
; crystal output
db0-db6
db7
p26
other
ea
ss
vdd
; thermal head drive
; motor drive
; ready
; not use (gnd connect)
; not use (v dd (+5 v) connect)
; not use (v dd (+5 v) connect) ss vdd v dd 52640 +5 v p10-
p17 8-bits
parallel
data int p26 p23 p24 21 p20 22 p21 23 p22 t1 39 1 t0 36 p25 12-18 19 tacho-
generator
signal motor
drive
output (? home
switch
signal +5 v motor (+5 v) thermal head
common (+5 v) home switch,
tacho-generator
common (gnd) ea 7 gnd 20 cpu
UPD50HC-033 db0-
db6 db7
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