Cpu ( Μ Pd75517Gf-400-3B9) - Casio CE-2400 Service Manual

µ
6-2. CPU ( PD75517GF-400-3B9)
Pin No. Signal
1 AN0
2 AVREF
3 VDD
4 VDD
5 P113
6 P112
7 P111
8 P110
9 P103
10 P102
11 P101
12 P100
13 P93
14 P92
15 P91
16 P90
17 SI1/P83 Key input signal (KI7)
18 SO1/P82 Key input signal (KI6)
19 SCK1/P81 Key input signal (KI5)
20 PP0/P80 Key input signal (KI4)
21 KR7/P73 Not used
22 KR6/P72 Display segment signal (SG1)
23 KR5/P71 Display segment signal (SF1)
24 KR4/P70 Display segment signal (SE1)
25 KR3/P63 Display segment signal (SD1)
26 KR2/P62 Display segment signal (SC1)
27 KR1/P61 Display segment signal (SB1)
28 KR0/P60 Display segment signal (SA1)
29 P53
30 P52
31 P51
32 P50
33 VSS
34 P43
35 P42
36 P41
37 P40
38 P33
39 P32
40 P31
41 P30
42 P23/BUZ Buzzer signal
43 P22/PCL Motor drive signal (for paper feeding)
44 P21
45 P20/PT00 Drawer open signal (DW)
46 P13/TI0
47 P12/INT2 Key input signal (KI8)
48 P11/INT1 Power down signal
49 P10/INT0 Reset pulse from printer
Descriptions
Mode switch signal (RF, OFF, REG, X, Z) signal
VCC terminal (+5 V)
VDD terminal (+5 V)
VDD terminal (+5 V)
Motor drive signal (M4)
Motor drive signal (M3)
Motor drive signal (M2)
Motor drive signal (M1)
Stamp/Clock signal
RAM address signal (A12)/Receipt and Journal feed (FEED) Out
RAM address signal (A09/A11)/Head drive signal (HD6)
RAM address signal (A08/A10)/Head drive signal (HD5)
RAM address signal (A03/A07)/Head drive signal (HD4)
RAM address signal (A02/A06)/Head drive signal (HD3)
RAM address signal (A01/A05)/Head drive signal (HD2)
RAM address signal (A00/A04)/Head drive signal (HD1)
Display segment signal (SDP0)
Display segment signal (SG0)
Display segment signal (SF0)
Display segment signal (SE0)
GND terminal
Display segment signal (SD0)
Display segment signal (SC0)
Display segment signal (SB0)
Display segment signal (SA0)
Display segment common signal (Dg4)
Display segment common signal (Dg3)
Display segment common signal (Dg2)
Display segment common signal (Dg1)
Step motor common signal (for print wheel)
Key input signal (KI9)
— 11 —
PW-on
I/O
level
In 2.0V
— 5.0V
— 5.0V
— 5.0V
Out Low
Out High
Out Low
Out Low
Out Low
Low
Out Low
Out Low
Out Low
Out Low
Out Low
Out Low
In High
In High
In High
In High
Out —
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
— —
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Pulse
Out Low
Out Low
Out High
Out Low
In High
In High
In Low
In High