—
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 (Not used)
13
WEB
Out
Write enable signal for RAM
14,15
RA15,16
Out
Address bus (Not used)
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
Содержание SF-4300B
Страница 1: ...MAR 1994 R with price SF 4300B LX 588 SF 4300B ...
Страница 3: ... 1 1 SCHEMATIC DIAGRAM 1 1 MAIN PCB ...
Страница 4: ... 2 1 2 KEY MATRIX ...
Страница 27: ...MA0600741A ...
