Canon Cat Repair Manual page 67

3-4. CPU PCB Unit
Gate Array
#
3
No. Terminal I/O I/O
I PE I
-
2 IPP 0
0
3 SLCT/ERR I I
4
cm
0 I
5 CD6
0 I
6 CDS
0 0
7 CD4 0 I
8
CD3 0 0
9 CD2 0 0
10
CDI 0 0
II
COO 0 0
12 DSTB 0 0
13 LOW BATT I I
14 TEST I
-
15 GND
-
I
16 AI I I
17 A2 I I
18 A3 I
I
19 A4
I I
20 RESET I I
21 R/W I I
22 DO I/O
I
23
D1
I/O
0
24
D2
I/O
0
25 D3 I/O
0
26
D4
I/O
0
27 D5 I/O
0
28
D6 I/O 0
29 D7 I/O 0
30 IOCSI I 0
31 CPUCK I 0
32 GND
- 0
3-42
Terminal No.
VDD 64
SIDE I 63
READY 62
WRP 61
RDATA 60
WGata 59
TRKOO 58
STEP 57
WDATA 56
MON 55
DIR
54
DSO
53
INDEX
52
VDD
51
KBDO 50
KBDI 49
KBD2 48
KBD3 47
KBD4 46
KBD5 45
KBD6 44
KBD7 43
KSTBO 42
KSTBI 41
KSTB2 40
KSTB3 39
KSTB4 38
KSTB5 37
KSTB6 36
KSTB7 35
CC 34
LEDE 33
SOURCES CHI CH2
SOURCES CHI CH2
TEST POINT 302
TEST POINT 30\
VOLT/D1V SV OC
VOLT/D1V SV OC
TIME/D1V O.S ms
TIME/D1V O.S iJos
TRIGGER CHI -.
TRIGGER CHI,
-T-'-r-'~-
I ..
~
......
~-++-r-rr:Ir'
@)
~.
ttl
I I t I J I
GNO->
10'
t
T
CENTRONICS I/F
Waveforms when "j" is printed (OS to 00 are omitted)
OSTB (ICIO-4)
ACK (IC33-3)
BUSY (IC33-6)
PE (IC33-8)
TIMING DIAGRAM
TALK ONLY
EXPAND INDICATOR [ON ]
GLITCH DISPLAY [OFF]
MAGNIFICATIOH [Xl ]
I I I I I I
0
I
1
I
21 n
3
SLCT (IC33-\1) 4
IPP
(IC32-1O) S
07
(IC32-8) 6
06 (IC32-6) 7
QQD
GNO->
TRACE-COMPLETE
SUS/CLK
100US/DIV
[ SOO.US]
I I I