(No.49875)1-25
SECTION 6
DESCRIPTION OF MAJOR ICs
6.1 BR24L16F-W-X (IC771) : EEPROM
• Pin layout
• Pin function
• Block diagram
6.2
IC-PST600M/G/-W (IC702) : System reset
6.3
LB1641 (IC402) : DC Motor driver
• Pin layout
• Truth table
VCC
WP
SCL
SDA
A0
A1
A2
GND
Symbol
I/O
Function
VCC
-
Power supply.
GND
-
GND
A0,A1,A2
I
No use connect to GND.
SCL
I
Serial clock input.
SDA
I/O Serial data I/O of slave and ward address.
WP
I
Write protect terminal.
8 Vcc
7 WP
6 SCL
5 SDA
A0 1
A1 2
A2 3
GND 4
16kbit EEPROM allay
11bit
11bit
8bit
Address
decoder
Slave Ward
Address resister
Data
resister
START
STOP
ACK
Control circuit
High voltage osc circuit
Power supply
voltage det.
IN
Vout
GND
1
3
2
OP1
Co1
1
2
3
4
5
6
7
8
9
10
GND OUT1 P1
VZ
IN1
IN2
VCC1 VCC2 P2
OUT2
Input
Output
Mode
IN1
IN2
OUT1
OUT2
0
0
0
0
Brake
1
0
1
0
CLOCKWISE
0
1
0
1
COUNTER-CLOCKWISE
1
1
0
0
Brake