Casio QT-2100 Service Manual page 17

5-2. LSI BLOCK DIAGRAM
5 V Backup
V-RAM
IC 1
CONTROLLER
LCDC
IC4
EP-ROM
IC 10
DALLAS RDISP
5 V
SERIAL
CPU (SH3)
3.3 V
SERIAL
5 V
1.9 V + 3.3 V
back up Vrtc only
MCR
I/O
BUZZER
IC11
KEY
MENU
DRAWER
3.3V unless otherwise specified
— 15 —
RS232C
CPUBUS
IC7
FROM
IC 9
3.3 V Backup
EDORAM
IC 8, 12
EDORAM
(OPTION)
CF-CARD
buf
3.3 V or 5 V
buf PCMCIA
GA
ARC-NET
IC 15
232C
232C
232C
232C
232C
5 V