SNC26041

One Channel Speech Controller

Ver: 1.7

October 14, 2009

10

8.2 Motor application

+

Separate CPU power path with

power path of large current

application

Battery

Box

Separate CPU GND with large

current application GND

IO1

8050

8050

IO2

IO3

IO4

There are some suggestions about PCB layout when user use SNC26000

series IC with motor applications.

(1) The capacitor C1 (104) C2 (104)is strongly suggested to be as close to the chip

as possible.

(2) It had better let OSC components (R) get close to IC chip.

(3) OSC components had better get far away large current applications.

(4) Separate IC power path with large current application power path to avoid affect

IC working by power drop from large current application.

Ω

Ω

Ω

)separate VDDIO and CVDD.

(6) Let power cable thicker, especially for large current application.

(7) C3 and C4 (104) are connected at the positive point and negative point of the

motor.