Casio DT-700, Service Manual, Page: 8 / 42

Page 6
5. Block Diagram
SH7020
Bus Controller Laser Unit
CPU Interrupt Controller
Buzzer
Ram 1k Watching Timer
LED (Red/Green)
M Rom 16k Timer Pulse Unit
I/O Port
DMA Controler Serial Controler
IR I/F
Sd/Rd/Ctrl
3 pin I/F
Bios 256k Sd/Rd/Gnd
Flash Rom
GA
CMOS I/F
Sd/Rd/Er/Dr
Bios 512k Clock Unit
Mask Rom 4.9/2.5/1.2 MHz
9.8304M Hz
Bios/KCG 512k
Mask Rom
Key Register On Key
Trigger Key
Real Time Clock Stroke Key:23Key
Main Ram 512k/1M Init Sw,
PS Ram
32.768M Hz
AM3 Box Sw,
I/O Box Sw,Frst
Contrl Unit
Back Light LED
Power Unit
LCDD
AM3X2 CR2032 Segment: 102 ch
Main Li Common: 48+1ch
Ram 10k bit
LCD
96 X 48 dots