Casio TE-3000S - Page 19

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5-3. LSI BLOCK DIAGRAM
78k4
3.3V
3.3V
or 5V
SELECTOR
232C
RS232C
buffer
FROM
M66300
buffer
3LINE-LCD
SRAM
SRAM
OPTION
PR
PR
CPU
buffer
CPUBUS
SERIAL
SERIAL
Backup
Backup
NOTE: 5.0 V unless otherwise specified
CF-CARD
E-STAMP
ARC-NET
buffer
232C
I/O
CONTROLLER
REAR
DISPLAY
SUPPER
BOARD
INTERFACE