Specifications

— 12 —
Pin No. Signal I/O Function
1 ~ 5 C0 ~ 4 Out Common Signal for display
6 GND In GND /0[V]
7,8 BZ1,2 Out Buzzer terminal
9 VDD In Power supply/5.3[V]
10 CSRA1 Out Chip enable signal (Not used)
11 CSRA2 Out Chip enable signal for RAM
12 CSROM Out Chip enable signal for ROM (only used in LX-546AQ)
13 WEB Out Write enable signal for RAM
14,15 RA15,16 Out Address bus for ROM (only used in LX-546AQ)
16 ~ 30 A0 ~ 14 Out Address bus
31 ~ 38 IO0 ~ 7 I/O Data bus
39 ~ 54 KY0 ~ 15 I/O Key signal
55 SW In Battery switch (On: "L"/0[V] Off: "H"/6[V])
56 DEBUG - Test for manufacturer
57 ON Out Data communication enable
58 CRCKI In GND/0[V]
59 SOUTB Out Transmission data output
60 SIN In Transmission data input
61 VDD In Power supply/5.3[V]
62 TEST - Test for manufacturer
63 VTM - Not used
6. LSI, IC (Pin function)
6-1. CPU
No.1