W567CXXX Datasheet, PDF (9/13 Pages) List of Unclassifed Manufacturers – 16-CHANNEL SPEECH+MELODY PROCESSOR

W567CXXX
7. TYPICAL APPLICATION CIRCUIT
(a) Rosc with 2 Battery
(3)
4.7uF
10ohm
(2) ^{0 .1uF}
VDDSPK
VDD/ VDDOSC
VDD_BP1/ VDD1
120 pF
(4)
ROSC
OSCIN
OSCOUT
TEST
X32I
X32O
BP00
|
BP07
BP10
|
BP17
BP20
|
BP27
PWM1+/DAC
PWM1-
Reset
Switch
/ RESET
0.1uF
PWM+/DAC
CVDD ^{VSSSPK VSS}
PWM-
(1)
VDDSPK
(5)
Speaker 1
8050
Rs
Speaker1
VDDSPK
(5)
Speaker 0
8050
Rs
Speaker0
Notes:
1. The block (1): If the project is two-battery application (Voltage 3.6V~2.2V), it is necessary to connect CVDD to VDD.
2. The block (2): The low-pass filter circuit is necessary for VDD stability, in order to avoid VDDSPK noise.
3. The block (3): The capacitor, 4.7uF, shunted between VDD and GND is necessary for power stability. However, the
value of capacitor depends on the power loading of the application.
4. The typical value of Rosc is 300 K for 8MHz and 390 K for 6MHz, and the Rosc should be connected to GND
(VSS). Please refer to design guide to get typical Rosc value for each part number.
5. The block (4):The capacitor, 120pF, shunted between OSCIN and VDD is optional for Fosc stability, which can
prevent noise from happening, because it can block the affection of larger current while playing. However, the value
of capacitor depends on the application (100pF~200pF is recommended)
6. The block (5): The Rs value is suggested of 270 ~ 1K to limit large DAC output current flowing into transistor.
7. The above application circuit is for reference only. No warranty for mass production.
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