Casio SF-7900E Service Manual & Parts List

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Pin No. Name In/Out Status Status Description
of OFF of ON
1~14,16,17 A0~A15 Out L Pulse Address Bus line
15,39, 100 VSS In GND GND GND terminal
24 WE Out H Pulse Write signal
25 OE Out H Pulse Read signal
26 FE Out H Pulse Chip select signal for Gate array
27 CS1 Out H H Chip select signal
28 CS2 Out H H Chip select signal
29 CS3 Out H Pulse Chip select signal
30 E0 Out L Pulse Chip enable signal (Not used)
31 E1 Out L H Chip enable signal (Not used)
32 E2 Out L H Chip enable signal (Not used)
33 E3 Out L H Chip enable signal (Not used)
34 BCON Out H H BCN signal (Not used)
35 MDP2 Out H L MDP signal (Not used)
36 SW In L L Switch signal (When switches are at ON position)
37 ONMK In H H Battery detection
38 TEST In L L TEST terminal (connect to GND)
40,41 OSC O/I In L Pulse Clock input
42 VDSC In L H Power input for Clock
43, 91 VDD1 In H H VDD input terminal
44 VDD2 In H H VDD input terminal
45 V2ON Out L H Power on output signal
46~53 KI7~KI0 In H H Key input signal
54 KAC Out L Pulse Power on switch signal output
55~65,67 KC0~KC11 Out H Pulse Key common signal output
66 GND In L L GND terminal
68 INT2 In H H Interrupt signal from Gate array
69 INT1 In L H Interrupt signal for transmission
70 INT0 In H H Interrupt signal for Power down
71 BRK In H H VDD input terminal
72 P0 Out H H Transmission data output
73 P1 In L H Reception data input
74 P2 In H H Card lock switch input (Not used)
75 P3 In L H IC card detection signal input (Not used)
76 P4 Out H Pulse Not used
77 P5 Out H Pulse Not used
78 P6 In H H Memory back-up battery detection input (Not used)
79 P7 In H H Battery detection input (Not used)
80 H1 Out H H Not used
81 WENL In L L GND terminal
82 H2 Out H H Not used
83 L1 Out L H Not used
84 L2 Out L L Not used
85 DT Out H Pulse DT signal output
86 PRO Out L H LCD driver mode selection signal
87 FR Out L Pulse LCD driver synchronous signal
88 LP Out H Pulse LCD driver latch pulse signal
89 GC Out H Pulse GC signal output
90 DE Out H Pulse LCD driver data latch clock signal
92~99 IO7~IO0 In/Out L Pulse Data bus line
18~23 RA14~19 Out L Pulse Address line (Not used)
CPU pin description (HD62076C03)

Casio SF-7900E Specifications

General

Brand	Casio
Model	SF-7900E
Category	Organizer
Language	English