11. Block Diagram
12. Wiring Connection Diagram
13. Terminal Functions of ICs
13.1. IC901 (M38B57M6141F) System Microprocessor
Pin /
No.
Mark I/O /
Division
Function
1-2 KEY2-KEY1 I Key input 1-2
3 THERM/
OVLD
I Thermal/Over load input
4 KEY4 I Key input 4
5
OVERLOAD2
I Over load input 2
6 FMST I Stereo signal detect
terminal
7 WAKW - Wake up timer LED /
(Not used, open)
8 RDS DI - Control of RDS IC / (Not
used, open)
9 REMOTE I Remote control terminal
10 RESET I Reset detect terminal
11 RDS CK - Control of RDS IC (CK)
clock / signal (Not used,
open)
12 RDS DT - Control of RDS IC (DT)
data signal / (Not used,
open)
13 GND - GND terminal
14 XIN I Crystal oscillator
terminal (4 MHz)
15 XOUT O Crystal oscillator
terminal (4 MHz)
16 VDD (+5V) - Power supply terminal +
5V
17 LED CK O LED driver IC (CK) clock
signal
18 LED DATA O LED driver IC (DT) data
signal
19 SFC1 I SFC mode encoder input
1
20 SFC2 I SFC mode encoder input
2