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1-32 (No.49793)
SECTION 4
Description of major ICs
4.1 BA6956AN (IC830, IC831) : Reversible motor driver
• Block diagram
• Pin function • Truth table
TSD
CONTROL LOGIC
1 2 3 4 5 6 7 8 9
V
REF
OUT2
RNF
OUT1
VM
Vcc
FIN
GND
RIN
Pin No. Symbol Function
1 VREF Output high voltage level control terminal
2 OUT2 Output terminal for motor
3 RNF GND of driver division
4 OUT1 Output terminal for motor
5 VM Power supply for driver division
6 Vcc Power supply for signal division
7 FIN Input terminal for control logic
8GNDGND
9 RIN Input terminal for control logic
FIN RIN OUT1 OUT2 MODE
H L H L Forward rotation mode
L H L H Reverse rotation mode
H H L L Break Mode
L L OPEN OPEN Stand-by mode