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PDF W538A806 Data sheet ( Hoja de datos )

Número de pieza W538A806
Descripción 8-Ch Speech/Melody/LCD Controller
Fabricantes Nuvoton 
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W538A8XX Data Sheet
8-Ch Speech/Melody/LCD Controller
(ViewTalk TM Series)
1. General description ........................................................................................................................................ 2
2. Features ......................................................................................................................................................... 3
3. PIN description ............................................................................................................................................... 5
4. Electrical Characteristics ................................................................................................................................ 7
4.1. ABSOLUTE MAXIMUM RATINGS....................................................................................................... 7
4.2. D.C. Characteristics ............................................................................................................................. 7
4.3. AC CHARATERISTICS........................................................................................................................ 9
4.4. Main-Clock oscillation Freq Vs. Resistor ........................................................................................... 10
4.5. Sub-Clock oscillation Freq Vs. Resistor............................................................................................. 10
5. Typical Application circuit ............................................................................................................................. 11
5.1 Main clock: Ring type........................................................................................................................... 11
5.2 Main clock: Crystal type ..................................................................................................................... 12
6. Revision History............................................................................................................................................ 13
Publication Release Date: Jul, 2008
- 1 - Revision A5

1 page




W538A806 pdf
W538A8XX Data Sheet
3. PIN DESCRIPTION
Name
BP0.0 – BP0.7
BP1.0 – BP1.7
BP2.0 – BP2.72
DAC/PWM+
PWM-
TEST
XIN
XOUT
XSEL
X32I
X32O
DH1-DH2
I/O Description
I/O Bi-direction port 0.
As an input pin, it can be pulled-high or float. As an output port, it can be an
inverter or open drain type output. The configuration is controlled by the
associated bits in BP0D and BP0M registers.
BP0.7 share with the IR carrier output.
Each BP0 port can detect SEG strobe queuing signal in BP0V register.
I/O Bi-direction port 1.
As an input port, it can be pulled-high or float. As an output port, it can be
an inverter or open drain type output. The configuration is controlled by the
associated bits in the BP1D and BP1M registers.
If the SIM is enabled, the BP1.0 pin shares with the DATA pin, BP1.1
shares with the ADDR pin, and BP1.2 shares with the CLK pin to access
data from the external serial flash (W55FXX) or mask ROM (W551Cxx).
I/O Bi-direction port 2.
As an input port, it can be pulled-high or float. As an output port, it can be
an inverter or open drain type output. The configuration is controlled by the
associated bits in the BP2D and BP2M registers.
O DAC output / PWM driver positive output
O PWM driver negative output
I Test pin, internally pulled low. It is pulled high in TEST mode.
I Input pin for the main-oscillator. When XSEL is high, connect a resister
between RXIN and VSS to generate the main clock. When XSEL is low,
connect 4MHz to 10MHz crystal between XIN and XOUT.
O Output pin for the main-oscillator. Connect a 4MHz to 10MHz crystal
between XIN and XOUT.
I Main clock select pin. When XSEL is high, the ring oscillator is used; when
XSEL is low, the crystal oscillator is used. This is a floating input.
I Input pin for the sub-oscillator. When mask option set RC type, connect RS
to X32O to generate the sub clock. When mask option set crystal, connect
a 32KHz crystal between X32I and X32O.
O Output pin for the sub-oscillator. Connect a 32KHz crystal between X32I
and X32O.
I Connection terminals the voltage doubling capacitor used in the LCD driver.
Notes:
2 @ W538A802 and W538A801: BP2.4 ~ BP2.7
-5-
Publication Release Date: Jul, 2008
Revision A5

5 Page





W538A806 arduino
W538A8XX Data Sheet
5. TYPICAL APPLICATION CIRCUIT
Main clock: Ring type
VDDP
(*2)
R5
Switch
64Seg x 16COM LCD Panel
VLCD> (VDD-0.5v)
COM0~15
SEG0~63
Battery
/RESET
R3
C1
C4
VDDP
VDD
C2
XSEL
VDD1
PWM+/DAC
PWM-
VDDP
VDD1_SPK
VSS1_SPK
C3
VSS2_SPK
R1
C5
(*4)
VDDP
W55Fxx
/W551CXX
XIN DH1
W538A8xx DH2
X32I
C14
R2 V6 C13
X32O
V5 C12
BP0 V4 C11
DATA/BP1.0
CLK/BP1.1
ADDR/BP1.2
BP1.3 ~ BP1.7
BP2
V3
V2
VSS2
VSS1
C10
C9
(*5)
VDDP
Q1
8050
R4
(*3)
(*1)
When 1/4 Bias,
V4=V5, C11
can Skip
COMPONENT C1 C2~C4 C5 C9~C14
R1
R2 R3
R4
Value
4.7uF 0.1uF 100pF 0.1~1uF 300K/4MHz 1.1M1 ~ 10 470 ~560
200K/6MHz
150K/8MHz
120K/10MHz
Note:
1. C9~C14 depends on LCD panel dot size.
2. Optional R5 equals 100Ω if high noise immunity is needed.
3. For optional DAC application.
4. Depending on the mask ROM version (e.g., demo, mass production, …), C5 can be skipped. If use W538A802 body, C5 is
needed.
5. To be sure chip operation properly, please bond VDD_PWM and VDD together, bond VSS_PWM1, VSS_PWM2 and VSS
together; and connect VSS as closely as possible to battery ground.
6. Main clock with Ring type, the frequency deviation depends on VDD and the resistor value
- 11 -
Publication Release Date: Jul, 2008
Revision A5

11 Page







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