Kenwood TK-250 Service Manual page 29

TK-250
SEMICONDUCTOR DATA
PPROM : XL24C01 AF (IC220)
: BR24C01 AF(IC220)
• Bock diagram
SOA
6
I
SCL
7 I WC
8 IVCC
Data
register
ACK
STOP
Slabe word
Address register
1,024 bit E2PROM aray
Control circuit
A1
12
AG
• Pin layout
• Pin function
VCC WC SCL SDA
o
Pin No.
Pin Name 1/0 Function
1-3
AO-A 1-A2 I
Slave address setting(terminal)
4
Vss
- Referenee voltage for alil/O,OV.
5
SOA 1/0
slave and word address, serial data in-
put/output
6
SCL
I
Se rial doek input
7
WC
I
Con neet to GNO
8
VCC
-
Conneet to the power supply.
AD
A1 A2 GND
- The SOA terminal is the N eh open drain output, so use with a pull-up
resistor attaehed to the outside.
29