Description Of Major Ics - JVC XV-521BK Service Manual

XV-521BK/523GD/525BK/421BK

Description of major ICs

AK93C45AF-W (IC791) : CMOS EEPROM
1.Pin Layout
AK93C45AF
1
NC
2
YCC
3
CS
SK 4
2.Pin Functions
Symbol
CS
SK
DI
DO
Vcc
GND
NC
3.Block Diagram
DI
INSTRUCTION
REGISTER
CS
SK
1-16
NC
8
GND
7
DO
6
5 DI
Function
Chip Select
Serial Clock Input
Serial Data Input
Serial Data Output
Power Supply
Ground
Non connection
DATA
REGISTER
INSTRUCTION
DECODE.
CONTROL
ADD.
AND
BUFFERS
CLOCK
GENERATION
R/W AMPS
16
16
AND
AUTO ERASE
DECODER
VPP SW
VPP
VREF
GENERATOR
DO
EEPROM
1024bit
64 X 16