PCF8531U NXP [NXP Semiconductors], PCF8531U Datasheet - Page 35

• Manufacturer Part Number: PCF8531U
• Description: 34 x 128 pixel matrix driver
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
15. Application information
PCF8531_4
Product data sheet
Fig 28. Typical system configuration
V
DD1
V
SS1
V
to V
DD(I2C)
15.1 Typical system configuration
, 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
C-bus. The SDA and SCL lines must be connected to the positive power supply via
R pu
DD
, V
R pu
SS
and V
MICROCONTROLLER
MICROPROCESSOR/
V
SS
LCD
HOST
) and suitable capacitors for decoupling V
Rev. 04 — 13 June 2008
V
V
SS1
SS2
,
PCF8531
V
LCD
128 column drivers
34 row drivers
34 x 128 pixel matrix driver
LCD
and V
LCD PANEL
PCF8531
© NXP B.V. 2008. All rights reserved.
DD
.
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