W536A031 Datasheet, PDF (14/16 Pages) Winbond – VOICE/MELODY/LCD CONTROLLER

W536A031
6. TYPICAL APPLICATION CIRCUITS
6.1 Sub Clock with RC Mode
VDDP
(*2)
SWITCH ^R5
C4
RA0~3
RB0~3
RC0~3
RD0
RE0~3
RF0~3
___
RES
VDDP
C1
R4
C2 C3
VDD
Rosc
R1
XIN
R3
C5
(*4)
X32IN
R2
X32IO
40SEG*16COM
LCD Panel
VLCD>VDD-0.5V
W536QXXX
VDDP
SPEAKER
Q1
8050
470
Ω
(*3)
PWM1/DAC
C6
(*4)
PWM2
SPEAKER
VDDP
ADDR/RD1
DATA/RD2
CLK/RD3
W55MXX
DH2
DH1
C14
V6
C13
V5
C12
V4
C11
V3
C10
V2
C9
(*1)
When 1/4 Bias,
V4=V5, C11 can Skip
VSSP
VSS
(*5)
COMPONENT C1 C2~C4 C5, C6 C7, C8 C9~C14
R1
R2
Value
4.7uF 0.1uF 100pF 15~ 30pF 0.1~1uF 680KΩ 680KΩ
R3
650KΩ/1MHz
350KΩ/2MHz
225KΩ/3MHz
160KΩ/4MHz
R4
100Ω
Notes:
(1) C9~C14 depends on LCD panel dot size.
(2) Option R5 equals to 100Ω if high noise immunity is needed.
(3) For DAC option application.
(4) To ensure that three batteries function well in W536F20 demo board. C₆ should stay close to pad PWM/PWM2 at its
best. Under the mask ROM version, C₅ and C₆ can be skipped.
(5) Sure chip operation properly, please bond all V_DDP, V_DD, V_SSP and V_SS; and connect V_SSP pad to V_SS from external PCB
circuit.
(6) Main clock with Ring type, the frequency deviation is depended on VDD and resistor
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