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PDF PCA8543 Data sheet ( Hoja de datos )
| Número de pieza | PCA8543 | |
| Descripción | 4 x 60 automotive LCD segment driver | |
| Fabricantes | NXP Semiconductors | |
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PCA8543
4 x 60 automotive LCD segment driver with integrated charge
pump
Rev. 1 — 21 January 2014
Product data sheet
1. General description
The PCA8543 is a peripheral device which interfaces to almost any Liquid Crystal Display
(LCD)1 with low multiplex rates. It generates the drive signals for any static or multiplexed
LCD containing up to four backplanes, 60 segments, and up to 240 elements. The
PCA8543 is compatible with most microcontrollers and communicates via the two-line
bidirectional I2C-bus. Communication overheads are minimized using a display RAM with
auto-incremented addressing and display memory switching. The PCA8543 features an
internal charge pump with internal capacitors for on-chip generation of the LCD driving
voltages.
For a selection of NXP LCD segment drivers, see Table 40 on page 59.
2. Features and benefits
AEC Q100 grade 2 compliant for automotive applications
Low power consumption
Extended operating temperature range from 40 C to +105 C
60 segments and 4 backplanes allowing to drive:
up to 30 7-segment alphanumeric characters
up to 15 14-segment alphanumeric characters
any graphics of up to 240 elements
Selectable backplane drive configuration: static, 2, or 4 backplane multiplexing
Programmable internal charge pump for on-chip LCD voltage generation up to
3 VDD2
400 kHz I2C-bus interface
Selectable linear temperature compensation of VLCD
Selectable display bias configuration
Wide range for digital and analog power supply: from 2.5 V to 5.5 V
Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 9.0 V for high
threshold (automobile) twisted nematic LCDs
On-chip RAM for display data storage arranged in two banks
Display memory bank switching
Programmable frame frequency in steps of 10 Hz in the range of 60 Hz to 300 Hz;
factory calibrated with a tolerance of 15 % covering the whole temperature and
voltage range
Selectable inversion scheme for LCD driving waveforms: frame or line inversion
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 19 on page 62.
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NXP Semiconductors
PCA8543
4 x 60 automotive LCD segment driver with integrated charge pump
7.2 Pin description
Table 4. Pin description
Input or input/output pins must always be at a defined level (VSS or VDD) unless otherwise specified.
Symbol
Pin
Type
Description
S0 to S59
61 to 80 and output
1 to 40
LCD segment
BP0 to BP3 41 to 44
output
LCD backplane
n.c.
45 to 48
-
not connected; do not connect and do not use as
feed through
VLCD
VDD2
VDD1
VSS
T1 to T3
CLK
49
50
51
52
53 to 55
56
supply/output[1] LCD supply voltage
supply
supply voltage 2 (charge pump)
supply
supply voltage 1 (analog and digital)
supply
ground supply voltage
input
input/output
test pins; must be tied to VSS in applications
internal oscillator output, external oscillator input
A0, A1
57, 58
input
I2C-bus slave address selection bit
SCL 59
input
I2C-bus serial clock
SDA
60
input/output
I2C-bus serial data
[1] When the internal VLCD generation is used, this pin drives the VLCD voltage. In this case pin VLCD
is an output. When the external supply is requested, then pin VLCD is an input and VLCD can be
supplied to it. In this case, the internal charge pump must be disabled (see Table 9 on page 8).
PCA8543
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 21 January 2014
© NXP B.V. 2014. All rights reserved.
5 of 70
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NXP Semiconductors
PCA8543
4 x 60 automotive LCD segment driver with integrated charge pump
8.1.12.1 Command: input-bank-select
Table 19. Input-bank-select - input bank select command bit description
Bit Symbol
Value
Description
7 to 3 -
0000 1
fixed value
2 IB
selects RAM bank to write to
0[1] bank 0
1 bank 1
1 to 0 -
00 fixed value
[1] Default value.
8.1.12.2 Command: output-bank-select
Table 20. Output-bank-select - output bank select command bit description
Bit Symbol
Value
Description
7 to 3 -
0001 0
fixed value
2 OB
selects RAM bank to read from to the LCD
0[1] bank 0
1 bank 1
1 to 0 -
00 fixed value
[1] Default value.
8.1.13 Command: write-RAM-data
The write-RAM-data command writes data byte-wise to the RAM. After Power-On Reset
(POR) the RAM content is random and should be brought to a defined status by clearing it
(setting it logic 0).
Table 21. Write-RAM-data - write RAM data command bit description[1]
Bit Symbol
Value
Description
7 to 0 B[7:0]
00000000 to writing data byte-wise to RAM
11111111
[1] For this command bit RS of the control byte has to be set logic 1 (see Table 34 on page 46).
More information about the display RAM can be found in Section 8.9 on page 37.
8.1.14 Command: temp-read
The temp-read command allows reading out the temperature values measured by the
internal temperature sensor.
Table 22. Temp-read - temperature readout command bit description[1]
For further information, see Table 10 on page 8 and Section 8.4.7 on page 32.
Bit Symbol
Value
Description
7 to 0 TD[7:0]
00000000 to readout representing the digital temperature
11111111
[1] For this command bit R/W of the I2C-bus slave address byte has to be set logic 1 (see Table 33 on
page 45).
PCA8543
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 21 January 2014
© NXP B.V. 2014. All rights reserved.
11 of 70
Free Datasheet http://www.0PDF.com
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