Block Diagram - Casio QT-2100 Service Manual

5-5-2. BLOCK DIAGRAM

PWD
RESET
from HardReset
from CPU PORT
RTS
CTS
DTR
TXD/RXD
3.3 V 5 V
LOAD × 2
CLOCK × 2
I/O
DATA × 2
CONTROLLER
BUZZ
KC × 12
KI × 14
12.5 MHz
Menu Sheet x 4
Drawer drive x 2
Drawer x 2
TXD (RS-232C)
INPUT
OUTPUT
BackLight ON/OFF
BUS outside WAIT
— 22 —
MCR
BUZZER
KEY
×
12 14
MENU
SHEET
DRAWER
×
2
REAR
DISP
DALLAS
KEY
OPTION
iButton: 1Wired Line
LCD
LCDC
6 MHz
VRAM
256 Kbit
Back up power for 1/4 VGA VRAM only
EPROM
BUS
4 Mbit
For Character Generator