PCF8531U2D NXP [NXP Semiconductors], PCF8531U2D Datasheet - Page 39

• Manufacturer Part Number: PCF8531U2D
• Description: 34 x 128 pixel matrix driver Single-chip LCD controller and driver
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
15. Application information
PCF8531
Product data sheet
Fig 29. Typical system configuration
V
DD1
V
SS1
V
to V
DD(I2C)
15.1 Typical system configuration
15.2 Power supply connections for internal V
, V
RES
SDA
SCL
DD3
SS2
The host microprocessor/microcontroller and the PCF8531 are both connected to the
I
pull-up resistors. The internal oscillator requires no external components. The appropriate
intermediate biasing voltage for the multiplexed LCD waveforms are generated on-chip.
The only other connections required to complete the system are to the power supplies
(V
2
Fig 30. Recommended V
R pu
C-bus. The SDA and SCL lines must be connected to the positive power supply via
DD
, V
R pu
SS
1.8 V (1.9 V) to 5.5 V
, and V
MICROCONTROLLER
MICROPROCESSOR/
V
2.5 V to 4.5 V
SS
All information provided in this document is subject to legal disclaimers.
LCD
HOST
GND
1 μF
1 μF
) and suitable capacitors for decoupling V
Rev. 6 — 16 May 2011
DD
V
V
V
V
V
connections for internal V
DD1
DD2
DD3
SS1
SS2
V
V
013aaa354
SS1
SS2
,
PCF8531
V
LCD
LCD
128 column drivers
LCD
34 row drivers
2.5 V to 4.5 V
generation
generation
34 x 128 pixel matrix driver
GND
LCD
1 μF
and V
V
V
V
V
V
LCD PANEL
PCF8531
DD1
DD2
DD3
SS1
SS2
© NXP B.V. 2011. All rights reserved.
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DD
mgs483
.
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