— 7 —
LSI PIN FUNCTION
CPU (T6C37) : LSI1
No Name I / O Function
1 RD O Read signal for memory devices
2 WR O Write signal for memory devices
3 VDD I +5V source
4~15, 17~21 A0~A11, EA12~EA16 O Address bus
16 GND I Ground (0V) source
26 VDD I +5V source
27 RC1 O Chip enable signal for ROM
29 RC3 O Chip enable signal for RAM
31 RNK1 I Thermal head rank setting
32 RNK2 I Thermal head rank setting
33 PSTB O Strobe signal for thermal head
34 LTCH O Latch signal for thermal head
35 SO O Data
36 PCLK O Clock pulse for thermal head
37 VDD I +5V source
38 XIN I Main clock input
39 XOUT O Main clock output
40 GND I Ground (0V) source
41~44 MT1~MT4 O Motor drive signal
45 TCON O Control signal for voltage VP
46~52 VCK0~VCK6 I Voltage detecting signal for low battery
53 RSI I Reset delay input
54 RSO O Reset delay output
55 VDE I Reset signal input
56 VCON O Control signal for voltage VDD1
57 PON I Power on signal from power switch
58 POFF I Power off signal from power switch
59~66 KI0~KI7 I Key input signal
67~75 KO0~KO8 O Key common signal
79 DPW I Voltage detecting signal for forced power off
81 RX --- Serial data input. Connected to VDD1
83~85 TAP1~TAP3 I Tape cartridge selecting signal. Connected to GND
86 LCS O Chip enable signal for LCD driver
87 RSTL O Reset signal for LCD driver
88 CRES I Reset timing signal input. Connected to reset pad
89, 90 DSW, GND --- Connected to GND
91 NBZ O Buzzer signal output
92 BZ O Buzzer signal output
93~100 CD0~CD7 I/O data bus
Table-2
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