Casio CE-6800 Service Manual page 6

2-2. BLOCK DIAGRAM (CE-6800)
COM3
COM2
COM1
IN-Line
Option I/O PB14
Address bus A8 - A19
Address
Latch
A0 -A7
RAM1
HY628100A
LLG-70
(128 K bytes)
RAM2
HY628100A
LLG-70
(128 K bytes)
MAIN PCB E457-1 C
Printer
Driver
M-U420-031
Driver
ARCNET Printer driver
driver
CPU
uPD784215GC201-8EU
Data bus D0 -D7
RAM3
(Option)
HM628512ALP-7
512 K bytes
(RAM-610)
RAM4
(Option)
HM628512ALP-7
512 K bytes
(RAM-610)
— 4 —
Main display Customer
(Dot & segment)
display
Display driver and Key control circuit
I/O selector
Flash ROM 1
LH28F016SCT-L95
(2 M bytes)
Keyboard
Data buffer