11
6-2. CPU (uPD75516GF-351-3B9)
Pin No. Signal Descriptions In/Out
PW-ON
level
1 AN0 Mode switch signal (RF,OFF,REG,X,Z) signal In 2.0V
2 AVREF VCC terminal (+5V) - 5.0V
3 VDD VDD terminal (+5V) - 5.0V
4 VDD VDD terminal (+5V) - 5.0V
5 P113 Motor drive signal (M4) Out Low
6 P112 Motor drive signal (M3) Out High
7 P111 Motor drive signal (M2) Out Low
8 P110 Motor drive signal (M1) Out Low
9 P103 Stamp / Clock signal Out Low
10 P102 RAM address signal (A12) / Receipt and Journal feed (FEED) Out Low
11 P101 RAM address signal (A09/A11) / Head drive signal (HD6) Out Low
12 P100 RAM address signal (A08/A10) / Head drive signal (HD5) Out Low
13 P93 RAM address signal (A03/A07) / Head drive signal (HD4) Out Low
14 P92 RAM address signal (A02/A06) / Head drive signal (HD3) Out Low
15 P91 RAM address signal (A01/A05) / Head drive signal (HD2) Out Low
16 P90 RAM address signal (A00/A04) / Head drive signal (HD1) Out Low
17 SI1/P83 Key input signal (Ki7) In High
18 SO1/P82 Key input signal (Ki6) In High
19 SCK1/P81 Key input signal (Ki5) In High
20 PP0/P80 Key input signal (Ki4) In High
21 KR7/P73 Not used Out -
22 KR6/P72 Display segment signal (SG1) Out Pulse
23 KR5/P71 Display segment signal (SF1) Out Pulse
24 KR4/P70 Display segment signal (SE1) Out Pulse
25 KR3/P63 Display segment signal (SD1) Out Pulse
26 KR2/P62 Display segment signal (SC1) Out Pulse
27 KR1/P61 Display segment signal (SB1) Out Pulse
28 KR0/P60 Display segment signal (SA1) Out Pulse
29 P53 Display segment signal (SDP0) Out Pulse
30 P52 Display segment signal (SG0) Out Pulse
31 P51 Display segment signal (SF0) Out Pulse
32 P50 Display segment signal (SE0) Out Pulse
33 VSS GND terminal -
34 P43 Display segment signal (SD0) Out Pulse
35 P42 Display segment signal (SC0) Out Pulse
36 P41 Display segment signal (SB0) Out Pulse
37 P40 Display segment signal (SA0) Out Pulse
38 P33 Display segment coomon signal (Dg4) Out Pulse
39 P32 Display segment coomon signal (Dg3) Out Pulse
40 P31 Display segment coomon signal (Dg2) Out Pulse
41 P30 Display segment coomon signal (Dg1) Out Pulse
42 P23/BUZ Buzzer signal Out Low
43 P22/PCL Motor drive signal (for paper feeding) Out Low
44 P21 Step motor common signal (for print wheel) Out High
45 P20/PT00 Drawer open signal (DW) Out Low
46 P13/TI0 Key input signal (Ki9) In High
47 P12/INT2 Key input signal (Ki8) In High
48 P11/INT1 Power down signal In Low
49 P10/INT0 Reset pulse from printer In High
50 P03/SI0/SB1 Key input signal (Ki3) In High
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