Handset Section - Sony SPP-A985 Service Manual

IC Block Digrams
r
– BASE UNIT SECTION –
U3007 CAT93C86S
– HANDSET SECTION –
U1006 CAT93C86S
1
CS
2
SK
INSTRUCTION
3
DI
REGISTER
ADDRESS
REGISTER
DECODER
EEPROM ARRAY 16384 BIT
IOF 1024
& (1024X16) or (2048X8)
(or 2048)
READ WRITE AMPS
DATA IN/OUT RESISTER
DATA OUT
DO 4
BUFFER
– BASE UNIT SECTION –
U3001 SN74HC595ADBR
16 15 14 13 12 11
VCC
1
INSTRUCTION
DECODER, CONTROL
LOGIC AND CLOCK
GENERATORS
HIGH VOLTAGE
GENERATOR
AND
PROGRAM
TIMER
16 (or 8) BITS
10 9
SHIFT REGISTER
LATCH
GND
2 3 4 5 6 7 8
PARALLEL DATA
OUTPUT
VCC
8
7 NC
6 ORG
5 VSS
– 48 –