SNC26031
One Channel Speech Controller
8.2 Motor application
Separate CPU power path with
power path of large current
application
+
IO1
IO2
8050
8050
Battery
Box
IO3
IO4
Separate CPU GND with large
current application GND
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.
(5) R2 (10
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.
Ver: 1.7
10
October 14, 2009
SONIX [ SONIX TECHNOLOGY COMPANY ]
