SNC21300A
1-CH H.Q. Speech Controller
8.2 Motor application
Separate CPU power path with
power path of large current
application
C3
104
R2
10Ω
M
C4
104
R1
220KΩ
M
+
VDDIO
CVDD
Rb1
100Ω
OSC
8050
IO1
IO2
8050
C1
104
C2
Rb2
100Ω
Battery
Box
104
IO3
IO4
IO5
RST
GNDIO
CGND
Separate CPU GND with large
current application GND
There are some suggestions about PCB layout when user use
SNC21XXXA 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 (10Ω)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.
11
Ver1.1
November 6, 2009
SONIX [ SONIX TECHNOLOGY COMPANY ]
