Pin Function Grouping

0:39

Consulting project materials.

Analyzing the schematic.

Yes — for a motor driver like this, the cleanest way is to put each pin in exactly one functional group, with no duplicates. That matches the recommended grouping rule for non-MCU ICs: group by function such as Power, Ground, Input, Output, and Control

Pin groups

Group	Pins
Power	VCC (20), VM1 (24), VM2 (13), VM3 (14)
Ground	GND (18), PGND1 (3, 4), PGND2 (9, 10)
Control / Logic Inputs	STBY (19), PWMA (23), PWMB (15), AIN1 (21), AIN2 (22), BIN1 (17), BIN2 (16)
Motor Outputs - Channel A	AO1 (1, 2), AO2 (5, 6)
Motor Outputs - Channel B	BO1 (11, 12), BO2 (7, 8)

Same data as a flat pin map

Pin	Name	Group
1	AO1	Motor Outputs - Channel A
2	AO1	Motor Outputs - Channel A
3	PGND1	Ground
4	PGND1	Ground
5	AO2	Motor Outputs - Channel A
6	AO2	Motor Outputs - Channel A
7	BO2	Motor Outputs - Channel B
8	BO2	Motor Outputs - Channel B
9	PGND2	Ground
10	PGND2	Ground
11	BO1	Motor Outputs - Channel B
12	BO1	Motor Outputs - Channel B
13	VM	Power
14	VM	Power
15	PWMB	Control / Logic Inputs
16	BIN2	Control / Logic Inputs
17	BIN1	Control / Logic Inputs
18	GND	Ground
19	STBY	Control / Logic Inputs
20	VCC	Power
21	AIN1	Control / Logic Inputs
22	AIN2	Control / Logic Inputs
23	PWMA	Control / Logic Inputs
24	VM	Power

Recommended common-function names

If you want to normalize the names for the part symbol, I’d use:

Table

Common Function	Pins
Power	VCC, VM1, VM2, VM3
Ground	GND, PGND1, PGND1, PGND2, PGND2
Input	AIN1, AIN2, BIN1, BIN2
PWM Control	PWMA, PWMB
Standby Control	STBY
Output A	AO1, AO1, AO2, AO2
Output B	BO1, BO1, BO2, BO2

If you want, I can next turn this into exact Flux Section and Pin Group values for every terminal so you can apply it directly.

Group the pins

Use function names

Flag ambiguous pins

13 days

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