PCA85233
Automotive 80 × 4 LCD driver for low multiplex rates
Rev. 4 — 6 May 2015
Product data sheet
1. General description
The PCA85233 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 and up to 80 segments and can easily
be cascaded for larger LCD applications. The PCA85233 is compatible with most
microcontrollers and communicates via the two-line bidirectional I2C-bus. Communication
overheads are minimized by a display RAM with auto-incremental addressing, by
hardware subaddressing, and by display memory switching (static and duplex drive
modes).
For a selection of NXP LCD segment drivers, see Table 28 on page 46.
2. Features and benefits
1.
AEC-Q100 compliant for automotive applications
Single-chip LCD controller and driver
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
Selectable display bias configuration: static, 1⁄2, or 1⁄3
Selectable frame frequency: 150 Hz or 220 Hz
Internal LCD bias generation with voltage-follower buffers
80 segment drives:
Up to 40 7-segment alphanumeric characters
Up to 20 14-segment alphanumeric characters
Any graphics of up to 320 segments/elements
80 4 bit RAM for display data storage
Display memory bank switching in static and duplex drive modes
Versatile blinking modes
Independent supplies possible for LCD and logic voltages
Wide power supply range: from 1.8 V to 5.5 V
Wide LCD supply range:
From 2.5 V for low-threshold LCDs
Up to 8.0 V for guest-host LCDs and high-threshold twisted nematic LCDs
Low power consumption
400 kHz I2C-bus interface
Extended temperature range up to 105 C
Backside laser marking
May be cascaded for large LCD applications (up to 2560 segments possible)
The definition of the abbreviations and acronyms used in this data sheet can be found in Section 20.
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
No external components needed
Compatible with Chip-On-Glass (COG) technology
3. Ordering information
Table 1.
Ordering information
Type number
Package
Name
Description
Version
PCA85233UG
bare die
110 bumps
PCA85233
3.1 Ordering options
Table 2.
Ordering options
Product type number
Orderable part number Sales item
(12NC)
PCA85233UG/2DA/Q1 PCA85233UG/2DA/Q1Z 935302508033
[1]
Delivery form
IC
revision
chip with hard bumps in tray[1]
1
Bump hardness see Table 25.
4. Marking
Table 3.
Marking codes
Type number
Marking code
PCA85233UG/2DA/Q1
on the rear side of the die
Line A: PCA85233UG
Line B: XXXXXX.XX WW[1]
[1]
The rear side marking has the following meaning:
XXXXXX.XX — Production and lot information
WW — wafer number
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Fig 1.
PCA85233
Product data sheet
Rear side laser marking
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Rev. 4 — 6 May 2015
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2 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
5. Block diagram
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Block diagram of PCA85233
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
3 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
6. Pinning information
'
6
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6.1 Pinning
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Viewed from active side. For mechanical details, see Figure 27.
Fig 3.
Pin configuration for PCA85233
6.2 Pin description
Table 4.
Pin description overview
Input or input/output pins must always be at a defined level (VSS or VDD) unless otherwise specified.
Symbol
Pin
Description
SDAACK
1 to 3
I2C-bus acknowledge output
SDA
4 to 6
I2C-bus serial data input
SCL
7 to 9
I2C-bus serial clock input
CLK
10
clock input and output
VDD
11 to 13
supply voltage
SYNC
14
cascade synchronization input or output; if not
used it must be left open
OSC
15
oscillator select
FF
16
frame frequency select
A0, A1
17, 18
subaddress input
T1
19
dedicated testing pin; to be tied to VSS in
application mode
20
I2C-bus slave address input
21 to 23
ground supply voltage
24 to 26
LCD supply voltage
SA0
VSS
[1]
VLCD
BP2, BP0, BP3, and BP1
27, 28, 109 and 110
LCD backplane output
S0 to S79
29 to 108
LCD segment output
D1 to D9
-
dummy pins
[1]
PCA85233
Product data sheet
The substrate (rear side of the die) is at VSS potential and should be electrically isolated.
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Rev. 4 — 6 May 2015
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7. Functional description
7.1 Commands of PCA85233
The command decoder identifies command bytes that arrive on the I2C-bus. The
commands available to the PCA85233 are defined in Table 5.
Table 5.
Definition of commands
Command
Operation code
Bit
7
6
5
4
3
2
1
Reference
mode-set
1
1
0
0
E
B
M[1:0]
load-data-pointer
0
P[6:0]
device-select
1
1
1
0
0
0
A[1:0]
bank-select
1
1
1
1
1
0
I
blink-select
1
1
1
1
0
AB
BF[1:0]
Mode-set command bit description
Bit
Symbol
Value
Description
7 to 4
-
1100
fixed value
3
E
[1]
Table 8
O
Table 9
Table 10
display status[1]
0
disabled (blank)[2]
1
enabled
LCD bias configuration[3]
B
1 to 0
Table 6
Table 7
Table 6.
2
0
0
1⁄
3
bias
1
1⁄
2
bias
M[1:0]
LCD drive mode selection
01
static; 1 backplane
10
1:2 multiplex; 2 backplanes
11
1:3 multiplex; 3 backplanes
00
1:4 multiplex; 4 backplanes
The possibility to disable the display allows implementation of blinking under external control.
[2]
The display is disabled by setting all backplane and segment outputs to VLCD.
[3]
Not applicable for static drive mode.
Table 7.
Load-data-pointer command bit description
See Section 7.3.1.
PCA85233
Product data sheet
Bit
Symbol
Value
Description
7
-
0
fixed value
6 to 0
P[6:0]
0000000 to
1001111
data pointer
7-bit binary value of 0 to 79, transferred to the data pointer to
define one of 80 display RAM addresses
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Rev. 4 — 6 May 2015
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 8.
Device-select command bit description
See Section 7.3.2.
Bit
Symbol
Value
Description
7 to 2
-
111000
fixed value
1 to 0
A[1:0]
00 to 11
device selection
2-bit binary value of 0 to 3, transferred to the subaddress
counter to define one of 4 hardware subaddresses
Table 9.
Bank-select command bit description[1]
See Section 7.3.5 and Section 7.3.6.
Bit
Symbol
Value
Description
7 to 2
-
111110
fixed value
1
I
Static
input bank selection: storage of arriving display data
0
1
0
[1]
1:2 multiplex
O
RAM row 0
RAM rows 0 and 1
RAM row 2
RAM rows 2 and 3
output bank selection: retrieval of LCD display data
0
RAM row 0
RAM rows 0 and 1
1
RAM row 2
RAM rows 2 and 3
The bank-select command has no effect in 1:3 or 1:4 multiplex drive modes.
Table 10. Blink-select command bit description
See Section 7.2.3.
Bit
Symbol
Value
Description
7 to 3
-
11110
fixed value
2
AB
1 to 0
blink mode selection[1]
0
normal blinking
1
blinking by alternating display RAM banks
blink frequency selection[2]
BF[1:0]
00
off
01
1
10
2
11
3
[1]
Normal blinking can only be selected in multiplex drive mode 1:3 or 1:4.
[2]
For the blink frequencies, see Table 12.
7.2 Clock and frame frequency
7.2.1 Oscillator
The internal logic and the LCD drive signals of the PCA85233 are timed by a frequency
fclk which either is derived from the built-in oscillator frequency fosc:
f osc
f clk = ------64
PCA85233
Product data sheet
(1)
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
or equals an external clock frequency fclk(ext):
(2)
f clk = f clk ext
7.2.1.1
Internal clock
The internal oscillator is enabled by connecting pin OSC to VSS. In this case the output
from pin CLK provides the clock signal for any cascaded PCA85233 in the system.
7.2.1.2
External clock
Connecting pin OSC to VDD enables an external clock source. Pin CLK then becomes the
external clock input.
Remark: A clock signal must always be supplied to the device; removing the clock may
freeze the LCD in a DC state, which is not suitable for the liquid crystal.
7.2.2 Frame frequency
The clock frequency fclk determines the LCD frame frequency ffr and is calculated as
follows:
f clk
f fr = ------24
(3)
The internal clock frequency fclk can be selected using pin FF. As a result 2 frame
frequencies are available: 150 Hz or 220 Hz (typical), see Table 11.
Table 11.
LCD frame frequencies
Pin FF tied to[1]
Typical clock frequency (Hz)
LCD frame frequency (Hz)
VDD
3600
150
VSS
5280
220
[1]
FF has no effect when an external clock is used but must not be left floating.
The timing of the PCA85233 organizes the internal data flow of the device. This includes
the transfer of display data from the display RAM to the display segment outputs. In
cascaded applications, the synchronization signal (SYNC) maintains the correct timing
relationship between all the PCA85233 in the system.
7.2.3 Blinking
The display blink capabilities of the PCA85233 are very versatile. The whole display can
blink at frequencies selected by the blink-select command (see Table 10). The blink
frequencies are derived from the clock frequency. The ratios between the clock and blink
frequencies depend on the blink mode selected (see Table 12).
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 12.
Blink frequencies
Blink mode
Operating mode ratio
Blink frequency with respect to fclk (typical)
fclk = 3.600 kHz
off
Unit
fclk = 5.280 kHz
-
blinking off
blinking off
Hz
1
f clk
-------768
4.7
6.9
Hz
2
f clk
----------1536
2.3
3.4
Hz
3
f clk
----------3072
1.2
1.7
Hz
An additional feature is for an arbitrary selection of LCD segments to blink. This applies to
the static and 1:2 multiplex drive modes and can be implemented without any
communication overheads. By means of the output bank selector, the displayed RAM
banks are exchanged with alternate RAM banks at the blink frequency. This mode can
also be specified by the blink-select command.
In the 1:3 and 1:4 multiplex modes, where no alternate RAM bank is available, groups of
LCD segments can blink by selectively changing the display RAM data at fixed time
intervals.
If the entire display can blink at a frequency other then the typical blink frequency. This
can be effectively performed by resetting and setting the display enable bit E at the
required rate using the mode-set command (see Table 6).
7.3 Display RAM
The display RAM is a static 80 4 bit RAM which stores LCD data.
There is a one-to-one correspondence between
• the bits in the RAM bitmap and the LCD segments/elements
• the RAM columns and the segment outputs
• the RAM rows and the backplane outputs.
A logic 1 in the RAM bitmap indicates the on-state of the corresponding LCD element;
similarly, a logic 0 indicates the off-state.
The display RAM bit map, Figure 4, shows rows 0 to 3 which correspond with the
backplane outputs BP0 to BP3, and columns 0 to 79 which correspond with the segment
outputs S0 to S79. In multiplexed LCD applications the segment data of the first, second,
third and fourth row of the display RAM are time-multiplexed with BP0,
BP1, BP2, and BP3 respectively.
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
8 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
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The display RAM bitmap shows the direct relationship between the display RAM addresses and
the segment outputs and between the bits in a RAM word and the backplane outputs.
Fig 4.
Display RAM bitmap
When display data is transmitted to the PCA85233, the received display bytes are stored
in the display RAM in accordance with the selected LCD drive mode. The data is stored as
it arrives and depending on the current multiplex drive mode the bits are stored singularly,
in pairs, triples or quadruples. To illustrate the filling order, an example of a 7-segment
display showing all drive modes is given in Figure 5; the RAM filling organization depicted
applies equally to other LCD types.
The following applies to Figure 5:
• In static drive mode the eight transmitted data bits are placed into row 0 as one byte.
• In 1:2 multiplex drive mode the eight transmitted data bits are placed in pairs into
row 0 and 1 as four successive 2-bit RAM words.
• In 1:3 multiplex drive mode the eight bits are placed in triples into row 0, 1, and 2 as
three successive 3-bit RAM words, with bit 3 of the third address left unchanged. It is
not recommended to use this bit in a display because of the difficult addressing. This
last bit may, if necessary, be controlled by an additional transfer to this address, but
care should be taken to avoid overwriting adjacent data because always full bytes are
transmitted (see Section 7.3.3).
• In 1:4 multiplex drive mode, the eight transmitted data bits are placed in quadruples
into row 0, 1, 2, and 3 as two successive 4-bit RAM words.
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
9 of 54
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Fig 5.
Relationships between LCD layout, drive mode, display RAM filling order, and display data transmitted over the I2C-bus
PCA85233
10 of 54
© NXP Semiconductors N.V. 2015. All rights reserved.
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Automotive 80 × 4 LCD driver for low multiplex rates
Rev. 4 — 6 May 2015
All information provided in this document is subject to legal disclaimers.
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NXP Semiconductors
Product data sheet
PCA85233
GULYHPRGH
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7.3.1 Data pointer
The addressing mechanism for the display RAM is realized using a data pointer. This
allows the loading of an individual display data byte, or a series of display data bytes, into
any location of the display RAM. The sequence commences with the initialization of the
data pointer by the load-data-pointer command (see Table 7). Following this command, an
arriving data byte is stored at the display RAM address indicated by the data pointer. The
filling order is shown in Figure 5. After each byte is stored, the content of the data pointer
is automatically incremented by a value dependent on the selected LCD drive mode:
•
•
•
•
In static drive mode by eight
In 1:2 multiplex drive mode by four
In 1:3 multiplex drive mode by three
In 1:4 multiplex drive mode by two
If an I2C-bus data access is terminated early then the state of the data pointer is unknown.
Consequently, the data pointer must be rewritten prior to further RAM accesses.
7.3.2 Subaddress counter
The storage of display data is determined by the content of the subaddress counter.
Storage is allowed only when the content of the subaddress counter match with the
hardware subaddress applied to A0 and A1. The subaddress counter value is defined by
the device-select command (see Table 8). If the content of the subaddress counter and
the hardware subaddress do not match, then data storage is inhibited but the data pointer
is incremented as if data storage had taken place. The subaddress counter is also
incremented when the data pointer overflows.
The storage arrangements described lead to extremely efficient data loading in cascaded
applications. When a series of display bytes are sent to the display RAM, automatic
wrap-over to the next PCA85233 occurs when the last RAM address is exceeded.
Subaddressing across device boundaries is successful even if the change to the next
device in the cascade occurs within a transmitted character.
The hardware subaddress must not be changed whilst the device is being accessed on
the I2C-bus interface.
7.3.3 RAM writing in 1:3 multiplex drive mode
In 1:3 multiplex drive mode, the RAM is written as shown in Table 13 (see Figure 5 as
well).
Table 13. Standard RAM filling in 1:3 multiplex drive mode
Assumption: BP2/S2, BP2/S5, BP2/S8 etc. are not connected to any segments/elements on the
display.
PCA85233
Product data sheet
Display RAM
bits (rows)/
backplane
outputs (BPn)
Display RAM addresses (columns)/segment outputs (Sn)
0
1
2
3
4
5
6
7
8
9
:
0
a7
a4
a1
b7
b4
b1
c7
c4
c1
d7
:
1
a6
a3
a0
b6
b3
b0
c6
c3
c0
d6
:
2
a5
a2
-
b5
b2
-
c5
c2
-
d5
:
3
-
-
-
-
-
-
-
-
-
-
:
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Rev. 4 — 6 May 2015
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
If the bit at position BP2/S2 would be written by a second byte transmitted, then the
mapping of the segment bits would change as illustrated in Table 14.
Table 14. Entire RAM filling by rewriting in 1:3 multiplex drive mode
Assumption: BP2/S2, BP2/S5, BP2/S8 etc. are connected to segments/elements on the display.
Display RAM
bits (rows)/
backplane
outputs (BPn)
Display RAM addresses (columns)/segment outputs (Sn)
0
1
2
0
a7
a4
a1/b7 b4
b1/c7 c4
1
a6
a3
a0/b6 b3
2
a5
a2
b5
b2
3
-
-
-
-
3
4
5
6
7
8
9
:
c1/d7 d4
d1/e7 e4
:
b0/c6 c3
c0/d6 d3
d0/e6 e3
:
c5
c2
d5
d2
e5
e2
:
-
-
-
-
-
-
:
In the case described in Table 14 the RAM has to be written entirely and BP2/S2, BP2/S5,
BP2/S8 etc. have to be connected to segments/elements on the display. This can be
achieved by a combination of writing and rewriting the RAM like follows:
• In the first write to the RAM, bits a7 to a0 are written.
• In the second write, bits b7 to b0 are written, overwriting bits a1 and a0 with bits b7
and b6.
• In the third write, bits c7 to c0 are written, overwriting bits b1 and b0 with bits c7 and
c6.
Depending on the method of writing to the RAM (standard or entire filling by rewriting),
some segments/elements remain unused or can be used, but it has to be considered in
the module layout process as well as in the driver software design.
7.3.4 Writing over the RAM address boundary
In all multiplex drive modes, depending on the setting of the data pointer, it is possible to
fill the RAM over the RAM address boundary. If the PCA85233 is part of a cascade the
additional bits fall into the next device that also generates the acknowledge signal. If the
PCA85233 is a single device or the last device in a cascade the additional bits will be
discarded and no acknowledge signal will be generated.
7.3.5 Output bank selector
The output bank selector (see Table 9) selects one of the four rows per display RAM
address for transfer to the display register. The actual row selected depends on the
selected LCD drive mode in operation and on the instant in the multiplex sequence.
• In 1:4 multiplex mode, all RAM addresses of row 0 are selected, these are followed by
the contents of row 1, 2, and then 3
• In 1:3 multiplex mode, rows 0, 1, and 2 are selected sequentially
• In 1:2 multiplex mode, rows 0 and 1 are selected
• In static mode, row 0 is selected
The PCA85233 includes a RAM bank switching feature in the static and 1:2 multiplex
drive modes. In the static drive mode, the bank-select command may request the contents
of row 2 to be selected for display instead of the contents of row 0. In the 1:2 multiplex
PCA85233
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PCA85233
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Automotive 80 × 4 LCD driver for low multiplex rates
mode, the contents of rows 2 and 3 may be selected instead of rows 0 and 1. This gives
the provision for preparing display information in an alternative bank and to be able to
switch to it once it is assembled.
7.3.6 Input bank selector
The input bank selector loads display data into the display RAM in accordance with the
selected LCD drive configuration. Display data can be loaded in row 2 in static drive mode
or in rows 2 and 3 in 1:2 multiplex drive mode by using the bank-select command (see
Table 9). The input bank selector functions independently to the output bank selector.
7.4 Initialization
At power-on the status of the I2C-bus and the registers of the PCA85233 is undefined.
Therefore the PCA85233 should be initialized as quickly as possible after power-on to
ensure a proper bus communication and to avoid display artifacts. The following
instructions should be accomplished for initialization:
• I2C-bus (see Section 8) initialization
– generating a START condition
– sending 0h and ignoring the acknowledge
– generating a STOP condition
• Mode-set command (see Table 6), setting
– bit E = 0
– bit B to the required LCD bias configuration
– bits M[1:0] to the required LCD drive mode
• Load-data-pointer command (see Table 7), setting
– bits P[6:0] to 0h (or any other required address)
• Device-select command (see Table 8), setting
– bits A[1:0] to the required hardware subaddress (for example, 0h)
• Bank-select command (see Table 9), setting
– bit I to 0
– bit O to 0
• Blink-select command (see Table 10), setting
– bit AB to 0 or 1
– bits BF[1:0] to 00 (or to a desired blinking mode)
• writing meaningful information (for example, a logo) into the display RAM
After the initialization, the display can be switched on by setting bit E = 1 with the
mode-set command.
7.5 Possible display configurations
The PCA85233 is a versatile peripheral device designed to interface between any
microcontroller to a wide variety of LCD segment or dot matrix displays (see Figure 6). It
can directly drive any static or multiplexed LCD containing up to four backplanes and up to
80 segments.
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
The display configurations possible with the PCA85233 depend on the required number of
active backplane outputs. A selection of display configurations is given in Table 15.
All of the display configurations given in Table 15 can be implemented in a typical system
as shown in Figure 7.
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Example of displays suitable for PCA85233
Table 15.
Selection of possible display configurations
Number of
Backplanes
PCA85233
Product data sheet
Icons
Digits/Characters
7-segment[1]
14-segment[2]
Dot matrix:
segments/
elements
4
320
40
20
320 (4 80)
3
240
30
15
240 (3 80)
2
160
20
10
160 (2 80)
1
80
10
5
80 (1 80)
[1]
7 segment display has 8 segments/elements including the decimal point.
[2]
14 segment display has 16 segments/elements including decimal point and accent dot.
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14 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
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Typical system configuration
The host microcontroller maintains the 2-line I2C-bus communication channel with the
PCA85233. The internal oscillator is enabled by connecting pin OSC to pin VSS. The
appropriate biasing voltages for the multiplexed LCD waveforms are generated internally.
The only other connections required to complete the system are the power supplies (VDD,
VSS, and VLCD) and the LCD panel chosen for the application.
7.6 LCD bias generator
Fractional LCD biasing voltages are obtained from an internal voltage divider of three
impedances connected between pins VLCD and VSS. The center impedance is bypassed
by switch if the 1⁄2 bias voltage level for the 1:2 multiplex drive mode configuration is
selected.
7.7 LCD voltage selector
The LCD voltage selector coordinates the multiplexing of the LCD in accordance with the
selected LCD drive configuration. The operation of the voltage selector is controlled by the
mode-set command from the command decoder. The biasing configurations that apply to
the preferred modes of operation, together with the biasing characteristics as functions of
VLCD and the resulting discrimination ratios (D) are given in Table 16.
Discrimination is a term which is defined as the ratio of the on and off RMS voltage across
a segment. It can be thought of as a measurement of contrast.
Table 16.
Biasing characteristics
LCD drive
mode
Number of:
LCD bias
Backplanes Levels configuration
V off RMS
------------------------V LCD
V on RMS
-----------------------V LCD
V on RMS
D = -----------------------V off RMS
static
1
2
static
0
1
3
1⁄
2
0.354
0.791
2.236
4
1⁄
3
0.333
0.745
2.236
1:3 multiplex 3
4
1⁄
3
0.333
0.638
1.915
1:4 multiplex 4
4
1⁄
3
0.333
0.577
1.732
1:2 multiplex 2
1:2 multiplex 2
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
A practical value for VLCD is determined by equating Voff(RMS) with a defined LCD
threshold voltage (Vth(off)), typically when the LCD exhibits approximately 10 % contrast. In
the static drive mode a suitable choice is VLCD > 3Vth(off).
Multiplex drive modes of 1:3 and 1:4 with 1⁄2 bias are possible but the discrimination and
hence the contrast ratios are smaller.
1
Bias is calculated by ------------- , where the values for a are
1+a
a = 1 for 1⁄2 bias
a = 2 for 1⁄3 bias
The RMS on-state voltage (Von(RMS)) for the LCD is calculated with Equation 4:
V on RMS =
V LCD
a 2 + 2a + n
-----------------------------2
n 1 + a
(4)
where the values for n are
n = 1 for static drive mode
n = 2 for 1:2 multiplex drive mode
n = 3 for 1:3 multiplex drive mode
n = 4 for 1:4 multiplex drive mode
The RMS off-state voltage (Voff(RMS)) for the LCD is calculated with Equation 5:
V off RMS =
V LCD
a 2 – 2a + n
-----------------------------2
n 1 + a
(5)
Discrimination is the ratio of Von(RMS) to Voff(RMS) and is determined from Equation 6:
V on RMS
D = ---------------------- =
V off RMS
2
a + 2a + n
--------------------------2
a – 2a + n
(6)
Using Equation 6, the discrimination for an LCD drive mode of 1:3 multiplex with
1⁄
2
bias is
1⁄
2
21
bias is ---------- = 1.528 .
3
3 = 1.732 and the discrimination for an LCD drive mode of 1:4 multiplex with
The advantage of these LCD drive modes is a reduction of the LCD full scale voltage VLCD
as follows:
• 1:3 multiplex (1⁄2 bias): V LCD =
6 V off RMS = 2.449V off RMS
4 3
- = 2.309V off RMS
• 1:4 multiplex (1⁄2 bias): V LCD = --------------------3
These compare with V LCD = 3V off RMS when 1⁄3 bias is used.
VLCD is sometimes referred as the LCD operating voltage.
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7.7.1 Electro-optical performance
Suitable values for Von(RMS) and Voff(RMS) are dependent on the LCD liquid used. The
RMS voltage, at which a pixel will be switched on or off, determine the transmissibility of
the pixel.
For any given liquid, there are two threshold values defined. One point is at 10 % relative
transmission (at Vth(off)) and the other at 90 % relative transmission (at Vth(on)), see
Figure 8. For a good contrast performance, the following rules should be followed:
V on RMS V th on
(7)
V off RMS V th off
(8)
Von(RMS) and Voff(RMS) are properties of the display driver and are affected by the selection
of a, n (see Equation 4 to Equation 6) and the VLCD voltage.
Vth(off) and Vth(on) are properties of the LCD liquid and can be provided by the module
manufacturer. Vth(off) is sometimes named Vth. Vth(on) is sometimes named saturation
voltage Vsat.
It is important to match the module properties to those of the driver in order to achieve
optimum performance.
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PCA85233
Product data sheet
Electro-optical characteristic: relative transmission curve of the liquid
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7.8 LCD drive mode waveforms
7.8.1 Static drive mode
The static LCD drive mode is used when a single backplane is provided in the LCD.
Backplane and segment drive waveforms for this mode are shown in Figure 9.
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Vstate1(t) = VSn(t) VBP0(t).
Von(RMS) = VLCD.
Vstate2(t) = V(Sn + 1)(t) VBP0(t).
Voff(RMS) = 0 V.
Fig 9.
PCA85233
Product data sheet
Static drive mode waveforms
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7.8.2 1:2 Multiplex drive mode
When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The
PCA85233 allows the use of 1⁄2 bias or 1⁄3 bias in this mode as shown in Figure 10 and
Figure 11.
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Vstate1(t) = VSn(t) VBP0(t).
Von(RMS) = 0.791VLCD.
Vstate2(t) = VSn(t) VBP1(t).
Voff(RMS) = 0.354VLCD.
Fig 10. Waveforms for the 1:2 multiplex drive mode with 1⁄2 bias
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
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19 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
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Vstate1(t) = VSn(t) VBP0(t).
Von(RMS) = 0.745VLCD.
Vstate2(t) = VSn(t) VBP1(t).
Voff(RMS) = 0.333VLCD.
Fig 11. Waveforms for the 1:2 multiplex drive mode with 1⁄3 bias
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
20 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7.8.3 1:3 Multiplex drive mode
When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies, as
shown in Figure 12.
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Vstate1(t) = VSn(t) VBP0(t).
Von(RMS) = 0.638VLCD.
Vstate2(t) = VSn(t) VBP1(t).
Voff(RMS) = 0.333VLCD.
Fig 12. Waveforms for the 1:3 multiplex drive mode with 1⁄3 bias
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
21 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7.8.4 1:4 Multiplex drive mode
When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as
shown in Figure 13.
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Vstate1(t) = VSn(t) VBP0(t).
Von(RMS) = 0.577VLCD.
Vstate2(t) = VSn(t) VBP1(t).
Voff(RMS) = 0.333VLCD.
Fig 13. Waveforms for the 1:4 multiplex drive mode with 1⁄3 bias
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
7.9 Backplane outputs
The LCD drive section includes four backplane outputs: BP0 to BP3. The backplane
output signals are generated in accordance with the selected LCD drive mode.
• In the 1:4 multiplex drive mode BP0 to BP3 must be connected directly to the LCD.
If less than four backplane outputs are required the unused outputs can be left
open-circuit.
• In 1:3 multiplex drive mode: BP3 carries the same signal as BP1; therefore, these two
adjacent outputs can be tied together to give enhanced drive capabilities.
• In 1:2 multiplex drive mode: BP0 and BP2, respectively, BP1 and BP3 carry the same
signals and can also be paired to increase the drive capabilities.
• In static drive mode: The same signal is carried by all four backplane outputs; and
they can be connected in parallel for very high drive requirements.
7.10 Segment outputs
The LCD drive section includes 80 segment outputs (S0 to S79) which must be connected
directly to the LCD. The segment output signals are generated in accordance with the
multiplexed backplane signals and with data residing in the display register. When less
than 80 segment outputs are required the unused segment outputs must be left
open-circuit.
PCA85233
Product data sheet
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
8. Characteristics of the I2C-bus
The I2C-bus is for bidirectional, two-line communication between different ICs or modules.
The two lines are a Serial DAta line (SDA) and a Serial CLock line (SCL). Both lines must
be connected to a positive supply via a pull-up resistor when connected to the output
stages of a device. Data transfer may be initiated only when the bus is not busy.
By connecting pin SDAACK to pin SDA on the PCA85233, the SDA line becomes fully
I2C-bus compatible. In COG applications where the track resistance from the SDAACK
pin to the system SDA line can be significant, possibly a voltage divider is generated by
the bus pull-up resistor and the Indium Tin Oxide (ITO) track resistance. As a
consequence it may be possible that the acknowledge generated by the PCA85233 can’t
be interpreted as logic 0 by the master. In COG applications where the acknowledge cycle
is required, it is therefore necessary to minimize the track resistance from the SDAACK
pin to the system SDA line to guarantee a valid LOW level.
By separating the acknowledge output from the serial data line (having the SDAACK open
circuit) design efforts to generate a valid acknowledge level can be avoided. However, in
that case the I2C-bus master has to be set up in such a way that it ignores the
acknowledge cycle.2
The following definition assumes SDA and SDAACK are connected and refers to the pair
as SDA.
8.1 Bit transfer
One data bit is transferred during each clock pulse. The data on the SDA line must remain
stable during the HIGH period of the clock pulse as changes in the data line at this time
will be interpreted as a control signal (see Figure 14).
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Fig 14. Bit transfer
8.2 START and STOP conditions
Both data and clock lines remain HIGH when the bus is not busy.
A HIGH-to-LOW change of the data line, while the clock is HIGH, is defined as the START
condition (S).
A LOW-to-HIGH change of the data line, while the clock is HIGH, is defined as the STOP
condition (P).
2.
For further information, please consider the NXP application note: Ref. 1 “AN10170”.
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
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PCA85233
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Automotive 80 × 4 LCD driver for low multiplex rates
The START and STOP conditions are shown in Figure 15.
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Fig 15. Definition of START and STOP conditions
8.3 System configuration
A device generating a message is a transmitter, a device receiving a message is the
receiver. The device that controls the message is the master; and the devices which are
controlled by the master are the slaves. The system configuration is shown in Figure 16.
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Fig 16. System configuration
8.4 Acknowledge
The number of data bytes transferred between the START and STOP conditions from
transmitter to receiver is unlimited. Each byte of eight bits is followed by an acknowledge
cycle.
• A slave receiver, which is addressed, must generate an acknowledge after the
reception of each byte.
• A master receiver must generate an acknowledge after the reception of each byte that
has been clocked out of the slave transmitter.
• The device that acknowledges must pull-down the SDA line during the acknowledge
clock pulse, so that the SDA line is stable LOW during the HIGH period of the
acknowledge related clock pulse (set-up and hold times must be taken into
consideration).
• A master receiver must signal an end of data to the transmitter by not generating an
acknowledge on the last byte that has been clocked out of the slave. In this event, the
transmitter must leave the data line HIGH to enable the master to generate a STOP
condition.
Acknowledgement on the I2C-bus is shown in Figure 17.
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
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25 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
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Fig 17. Acknowledgement on the I2C-bus
8.5 I2C-bus controller
The PCA85233 acts as an I2C-bus slave receiver. It does not initiate I2C-bus transfers or
transmit data to an I2C-bus master receiver. The only data output from the PCA85233 are
the acknowledge signals from the selected devices. Device selection depends on the
I2C-bus slave address, on the transferred command data, and on the hardware
subaddress.
In single device applications, the hardware subaddress inputs A0 and A1 are normally tied
to VSS which defines the hardware subaddress 0. In multiple device applications A0
and A1 are tied to VSS or VDD using a binary coding scheme, so that no two devices with a
common I2C-bus slave address have the same hardware subaddress.
8.6 Input filters
To enhance noise immunity in electrically adverse environments, RC low-pass filters are
provided on the SDA and SCL lines.
8.7 I2C-bus protocol
Two I2C-bus slave addresses (0111 000 and 0111 001) are used to address the
PCA85233. The entire I2C-bus slave address byte is shown in Table 17.
Table 17.
I2C slave address byte
Slave address
Bit
7
6
5
4
3
2
1
MSB
0
0
LSB
1
1
1
0
0
SA0
R/W
The PCA85233 is a write-only device and will not respond to a read access, therefore bit 0
should always be logic 0. Bit 1 of the slave address byte that a PCA85233 will respond to,
is defined by the level tied to its SA0 input (VSS for logic 0 and VDD for logic 1).
PCA85233
Product data sheet
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PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Having two reserved slave addresses allows the following on the same I2C-bus:
• Up to 8 PCA85233 on the same I2C-bus for very large LCD applications
• The use of two types of LCD multiplex drive modes on the same I2C-bus
The I2C-bus protocol is shown in Figure 18. The sequence is initiated with a START
condition (S) from the I2C-bus master which is followed by one of the available PCA85233
slave addresses. All PCA85233 with the same SA0 level acknowledge in parallel to the
slave address. All PCA85233 with the alternative SA0 level ignore the whole I2C-bus
transfer.
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Fig 18. I2C-bus protocol
After acknowledgement, the control byte is sent, defining if the next byte is a RAM or
command information. The control byte also defines if the next byte is a control byte or
further RAM or command data (see Figure 19 and Table 18). In this way it is possible to
configure the device and then fill the display RAM with little overhead.
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Fig 19. Control byte format
PCA85233
Product data sheet
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PCA85233
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Automotive 80 × 4 LCD driver for low multiplex rates
Table 18.
Control byte description
Bit
Symbol
7
CO
6
Value
Description
continue bit
0
last control byte
1
control bytes continue
RS
register selection
0
command register
1
5 to 0
-
data register
not relevant
The command bytes and control bytes are also acknowledged by all addressed
PCA85233 connected to the bus.
The display bytes are stored in the display RAM at the address specified by the data
pointer and the subaddress counter. Both data pointer and subaddress counter are
automatically updated.
The acknowledgement after each byte is made only by the (A0 and A1) addressed
PCA85233. After the last display byte, the I2C-bus master issues a STOP condition (P).
Alternatively a START may be asserted to RESTART an I2C-bus access.
9. Internal circuitry
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Fig 20. Device protection diagram
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
28 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
10. Safety notes
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Observe precautions for handling
electrostatic sensitive devices.
Such precautions are described in the ANSI/ESD S20.20, IEC/ST 61340-5, JESD625-A or
equivalent standards.
CAUTION
Static voltages across the liquid crystal display can build up when the LCD supply voltage
(VLCD) is on while the IC supply voltage (VDD) is off, or vice versa. This may cause unwanted
display artifacts. To avoid such artifacts, VLCD and VDD must be applied or removed together.
CAUTION
Semiconductors are light sensitive. Exposure to light sources can cause the IC to
malfunction. The IC must be protected against light. The protection must be applied to all
sides of the IC.
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
29 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
11. Limiting values
Table 19. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).[1]
Symbol
Parameter
Conditions
Min
VDD
supply voltage
VLCD
LCD supply voltage
0.5
+9.0
V
Vi(n)
voltage on any input
VDD related inputs
0.5
+6.5
V
Vo(n)
voltage on any output
VLCD related outputs
0.5
+9.0
V
II
input current
10
+10
mA
IO
output current
10
+10
mA
IDD
supply current
50
+50
mA
ISS
ground supply current
50
+50
mA
IDD(LCD)
LCD supply current
50
+50
mA
0.5
Max
+6.5
Unit
V
Ptot
total power dissipation
-
400
mW
P/out
power dissipation per
output
-
100
mW
VESD
electrostatic discharge
voltage
HBM
[2]
-
4000
V
MM
[3]
-
250
V
latch-up current
[4]
-
100
mA
Tstg
storage temperature
[5]
65
+150
C
Tamb
ambient temperature
40
+105
C
Ilu
[1]
operating device
Stresses above these values listed may cause permanent damage to the device.
[2]
Pass level; Human Body Model (HBM) according to Ref. 8 “JESD22-A114”.
[3]
Pass level; Machine Model (MM), according to Ref. 9 “JESD22-A115”.
[4]
Pass level; latch-up testing, according to Ref. 10 “JESD78” at maximum ambient temperature (Tamb(max)).
[5]
According to the store and transport requirements (see Ref. 13 “UM10569”) the devices have to be stored at a temperature of +8 C to
+45 C and a humidity of 25 % to 75 %.
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
30 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
12. Static characteristics
Table 20. Static characteristics
VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 8.0 V; Tamb = 40 C to +105 C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
supply voltage
VLCD 6.5 V
1.8
-
5.5
V
VLCD > 6.5 V
2.5
-
5.5
V
VDD < 2.5 V
2.5
-
6.5
V
Supplies
VDD
VLCD
LCD supply voltage
VDD 2.5 V
IDD
supply current
fclk(ext) = 1536 Hz;
VDD = 5.5 V; see Figure 21
[1]
IDD(LCD)
LCD supply current
fclk(ext) = 1536 Hz;
VDD = 5.5 V;VLCD = 8.0 V;
see Figure 21
[1]
2.5
-
8.0
V
-
3
6
A
-
22
45
A
VSS 0.5
-
VDD + 0.5
V
Logic
VI
input voltage
VIH
HIGH-level input voltage
on pins CLK, SYNC, OSC,
A0, A1, T1, SA0, FF
0.7VDD
-
VDD
V
VIL
LOW-level input voltage
on pins CLK, SYNC, OSC,
A0, A1, T1, SA0, FF
VSS
-
0.3VDD
V
VOH
HIGH-level output voltage
0.8VDD
-
-
V
VOL
LOW-level output voltage
-
-
0.2VDD
V
IOH
HIGH-level output current
output source current;
on pin CLK;
VOH = 4.6 V; VDD = 5 V
1
-
-
mA
IOL
LOW-level output current
output sink current;
on pin CLK, SYNC;
VOL = 0.4 V; VDD = 5 V
1
-
-
mA
IL
leakage current
on pins OSC, CLK, SCL,
SDA, A0, A1, T1, SA0, FF;
VI = VDD or VSS
1
-
+1
A
CI
input capacitance
-
-
7
pF
[3]
I2C-bus[2]
Input on pins SDA and SCL
VI
input voltage
VSS 0.5
-
5.5
V
VIH
HIGH-level input voltage
0.7VDD
-
5.5
V
VIL
LOW-level input voltage
VSS
-
0.3VDD
V
-
-
7
pF
3
-
-
mA
CI
input capacitance
IOL(SDA)
LOW-level output current
on pin SDA
PCA85233
Product data sheet
[3]
output sink current;
VOL = 0.4 V; VDD = 5 V
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
31 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 20. Static characteristics …continued
VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 8.0 V; Tamb = 40 C to +105 C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
on pins BP0 to BP3; Cbpl =
35 nF
100
-
+100
mV
on pins S0 to S79; Csgm = 5
nF
100
-
+100
mV
LCD outputs
VO
output voltage variation
output resistance
RO
VLCD = 5 V
on pins BP0 to BP3
[4]
-
1.5
10
k
on pins S0 to S79
[4]
-
6.0
13.5
k
[1]
LCD outputs are open-circuit; inputs at VSS or VDD; external clock with 50 % duty factor; I2C-bus inactive.
[2]
The I2C-bus interface of PCA85233 is 5 V tolerant.
[3]
Not tested, design specification only.
[4]
Outputs measured individually and sequentially.
DDD
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Conditions: VDD = 5.5 V; VLCD = 8 V; Tamb = 27 C; all RAM filled with 0.
(1) IDD(LCD).
(2) IDD.
Fig 21. Current consumption with respect to external clock frequency
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
32 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
13. Dynamic characteristics
Table 21. Dynamic characteristics
VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 8.0 V; Tamb = 40 C to +105 C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Clock
Internal: output pin CLK
fclk
clock frequency
FF = VDD
[1][2]
2630
3600
4680
Hz
FF = VSS
[1][2]
3855
5280
6865
Hz
150
-
Hz
ffr
frame frequency
FF = VDD
-
FF = VSS
-
220
-
Hz
ffr
frame frequency variation
FF = VDD; see Figure 22
110
150
195
Hz
FF = VSS; see Figure 22
161
220
286
Hz
External: input pin CLK
[2]
fclk(ext)
external clock frequency
800
-
7000
Hz
tclk(H)
HIGH-level clock time
90
-
-
s
tclk(L)
LOW-level clock time
90
-
-
s
-
30
-
ns
1
-
-
s
-
-
30
s
Synchronization: input pin SYNC
tPD(SYNC_N) SYNC propagation delay
tSYNC_NL
SYNC LOW time
Outputs: pins BP0 to BP3 and S0 to S79
tPD(drv)
I2C-bus:
driver propagation delay
VLCD = 5 V
timing[3]
Pin SCL
fSCL
SCL clock frequency
-
-
400
kHz
tHIGH
HIGH period of the SCL
clock
0.6
-
-
s
tLOW
LOW period of the SCL
clock
1.3
-
-
s
tSU;DAT
data set-up time
100
-
-
ns
tHD;DAT
data hold time
0
-
-
ns
Pin SDA
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
33 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 21. Dynamic characteristics …continued
VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 8.0 V; Tamb = 40 C to +105 C; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Pins SCL and SDA
tBUF
bus free time between a
STOP and START
condition
1.3
-
-
s
tSU;STO
set-up time for STOP
condition
0.6
-
-
s
tHD;STA
hold time (repeated)
START condition
0.6
-
-
s
tSU;STA
set-up time for a repeated
START condition
0.6
-
-
s
tr
rise time of both SDA and
SCL signals
fSCL = 400 kHz
-
-
0.3
s
fSCL < 125 kHz
-
-
1.0
s
tf
fall time of both SDA and
SCL signals
-
-
0.3
s
Cb
capacitive load for each
bus line
-
-
400
pF
tw(spike)
spike pulse width
-
-
50
ns
[1]
[2]
[3]
on bus
Typical output duty cycle of 50 %.
f clk
The corresponding frame frequency is f fr = -------.
24
All timing values are valid within the operating supply voltage and ambient temperature range and are referenced to VIL and VIH with an
input voltage swing of VSS to VDD. For I2C-bus timings see Figure 24.
DDD
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7DPE&
(1) VDD = 5.5 V; FF = VSS.
(2) VDD = 5.5 V; FF = VDD.
(3) VDD = 1.8 V; FF = VSS.
(4) VDD = 1.8 V; FF = VDD.
Fig 22. Frame frequency with respect to temperature
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
34 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
I&/.
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Fig 23. Driver timing waveforms
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Fig 24. I2C-bus timing waveforms
14. Application information
14.1 Cascaded operation
In large display configurations up to 8 PCA85233 can be recognized on the same I2C-bus
by using the 2-bit hardware subaddress (A0 and A1) and the programmable I2C-bus slave
address (SA0).
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
35 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 22.
Addressing cascaded PCA85233
Cluster
Bit SA0
Pin A1
Pin A0
Device
1
0
0
0
0
0
1
1
1
0
2
1
1
3
0
0
4
0
1
5
1
0
6
1
1
7
2
1
When cascaded PCA85233 are synchronized, they can share the backplane signals from
one of the devices in the cascade. Such an arrangement is cost-effective in large LCD
applications since the backplane outputs of only one device need to be through-plated to
the backplane electrodes of the display. The other PCA85233 of the cascade contribute
additional segment outputs. The backplanes can either be connected together to enhance
the drive capability or some can be left open-circuit (such as the ones from the slave in
Figure 25) or just some of the master and some of the slave will be taken to facilitate the
layout of the display.
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(1) Is master (OSC connected to VSS).
(2) Is slave (OSC connected to VDD).
Fig 25. Cascaded PCA85233 configuration
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
36 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
For display sizes that are not multiple of 320 segments/elements, a mixed cascaded
system can be considered containing only devices like PCA85233 and PCA85132.
Depending on the application, one must take care of the software command and pin
connection compatibility.
Only one master but multiple slaves are allowed in a cascade. All devices in the cascade
have to use the same clock whether it is supplied externally or provided by the master.
The SYNC line is provided to maintain the correct synchronization between all cascaded
PCA85233. The only time that SYNC is likely to be needed is if synchronization is
accidentally lost (e.g. by noise in adverse electrical environments or by the definition of a
multiplex drive mode when PCA85233 with different SA0 levels are cascaded).
SYNC is organized as an input/output pin; The output selection is realized as an
open-drain driver with an internal pull-up resistor. A PCA85233 asserts the SYNC line at
the onset of its last active backplane signal and monitors the SYNC line at all other times.
If synchronization in the cascade is lost, it is restored by the first PCA85233 to assert
SYNC. The timing relationships between the backplane waveforms and the SYNC signal
for the various drive modes of the PCA85233 are shown in Figure 26.
7IU
IIU
%3
6<1&
DVWDWLFGULYHPRGH
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ELDV
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ELDV
6<1&
EPXOWLSOH[GULYHPRGH
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ELDV
6<1&
FPXOWLSOH[GULYHPRGH
%3
ELDV
6<1&
GPXOWLSOH[GULYHPRGH
PJO
Fig 26. Synchronization of the cascade for the various PCA85233 drive modes
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
37 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
The contact resistance between the SYNC pins of cascaded devices must be controlled. If
the resistance is too high, then the device will not be able to synchronize properly. This is
particularly applicable to COG applications.
15. Test information
15.1 Quality information
This product has been qualified in accordance with the Automotive Electronics Council
(AEC) standard Q100 - Failure mechanism based stress test qualification for integrated
circuits, and is suitable for use in automotive applications.
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
38 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
16. Bare die outline
%DUHGLHEXPSV
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Fig 27. Bare die outline of PCA85233UG
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
39 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 23. Dimensions of PCA85233UG
Original dimensions are in mm.
Unit (mm)
A
A1
A2
b
D
E
e
e1
L
max
-
0.018
-
-
-
-
-
-
-
nom
0.40
0.015
0.38
0.03
4.16
1.07
0.054
0.203
0.09
min
-
0.012
-
-
-
-
-
-
-
Table 24. Bump locations of PCA85233UG
All x/y coordinates represent the position of the center of each bump with respect to the center
(x/y = 0) of the chip; see Figure 27.
Symbol
PCA85233
Product data sheet
Bump
X (m)
Y (m)
Description
SDAACK
1
1022.67 436.5
SDAACK
2
968.67
436.5
SDAACK
3
914.67
436.5
SDA
4
712.17
436.5
SDA
5
658.17
436.5
SDA
6
604.17
436.5
SCL
7
433.17
436.5
SCL
8
379.17
436.5
SCL
9
325.17
436.5
CLK
10
173.52
436.5
clock input/output
VDD
11
61.47
436.5
supply voltage
VDD
12
7.47
436.5
VDD
13
46.53
436.5
[1]
I2C-bus acknowledge output
[1]
I2C-bus serial data input
I2C-bus serial clock input
SYNC
14
149.58
436.5
cascade synchronization input/output
OSC
15
262.08
436.5
oscillator select
FF
16
345.78
436.5
frame frequency select
A0
17
429.48
436.5
subaddress input
A1
18
513.18
436.5
T1
19
596.88
436.5
test pin
SA0
20
680.58
436.5
I2C-bus slave address input; bit 0
VSS
21
765.63
436.5
ground supply voltage
VSS
22
819.63
436.5
VSS
23
873.63
436.5
VLCD
24
979.83
436.5
VLCD
25
1033.83
436.5
VLCD
26
1087.83
436.5
BP2
27
1176.03
436.5
BP0
28
1230.03
436.5
S0
29
1284.03
436.5
S1
30
1338.03
436.5
S2
31
1392.03
436.5
S3
32
1446.03
436.5
LCD supply voltage
LCD backplane output
LCD segment output
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
40 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 24. Bump locations of PCA85233UG
All x/y coordinates represent the position of the center of each bump with respect to the center
(x/y = 0) of the chip; see Figure 27.
PCA85233
Product data sheet
Symbol
Bump
X (m)
Y (m)
Description
S4
33
1500.03
436.5
LCD segment output
S5
34
1554.03
436.5
S6
35
1608.03
436.5
S7
36
1662.03
436.5
S8
37
1716.03
436.5
S9
38
1770.03
436.5
S10
39
1824.03
436.5
S11
40
1878.03
436.5
S12
41
1423.53
436.5
S13
42
1369.53
436.5
S14
43
1315.53
436.5
S15
44
1261.53
436.5
S16
45
1207.53
436.5
S17
46
1153.53
436.5
S18
47
1099.53
436.5
S19
48
1045.53
436.5
S20
49
991.53
436.5
S21
50
937.53
436.5
S22
51
883.53
436.5
S23
52
829.53
436.5
S24
53
714.06
436.5
S25
54
660.06
436.5
S26
55
606.06
436.5
S27
56
552.06
436.5
S28
57
498.06
436.5
S29
58
444.06
436.5
S30
59
390.06
436.5
S31
60
336.06
436.5
S32
61
282.06
436.5
S33
62
228.06
436.5
S34
63
112.59
436.5
S35
64
58.59
436.5
S36
65
4.59
436.5
S37
66
49.41
436.5
S38
67
103.41
436.5
S39
68
157.41
436.5
S40
69
211.41
436.5
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
41 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 24. Bump locations of PCA85233UG
All x/y coordinates represent the position of the center of each bump with respect to the center
(x/y = 0) of the chip; see Figure 27.
PCA85233
Product data sheet
Symbol
Bump
X (m)
Y (m)
Description
S41
70
265.41
436.5
LCD segment output
S42
71
319.41
436.5
S43
72
373.41
436.5
S44
73
427.41
436.5
S45
74
481.41
436.5
S46
75
596.88
436.5
S47
76
650.88
436.5
S48
77
704.88
436.5
S49
78
758.88
436.5
S50
79
812.88
436.5
S51
80
866.88
436.5
S52
81
920.88
436.5
S53
82
974.88
436.5
S54
83
1028.88 436.5
S55
84
1082.88 436.5
S56
85
1136.88 436.5
S57
86
1252.35 436.5
S58
87
1306.35 436.5
S59
88
1360.35 436.5
S60
89
1414.35 436.5
S61
90
1468.35 436.5
S62
91
1522.35 436.5
S63
92
1576.35 436.5
S64
93
1630.35 436.5
S65
94
1684.35 436.5
S66
95
1738.35 436.5
S67
96
1792.35 436.5
S68
97
1876.05 436.5
S69
98
1822.05 436.5
S70
99
1768.05 436.5
S71
100
1714.05 436.5
S72
101
1660.05 436.5
S73
102
1606.05 436.5
S74
103
1552.05 436.5
S75
104
1498.05 436.5
S76
105
1444.05 436.5
S77
106
1390.05 436.5
S78
107
1336.05 436.5
S79
108
1282.05 436.5
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
42 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 24. Bump locations of PCA85233UG
All x/y coordinates represent the position of the center of each bump with respect to the center
(x/y = 0) of the chip; see Figure 27.
Symbol
Bump
X (m)
Y (m)
BP3
109
1228.05 436.5
BP1
110
1174.05 436.5
D1
-
1932.03
436.5
D2
-
1909.53
436.5
D3
-
1801.53
436.5
D4
-
1693.53
436.5
D5
-
1585.53
436.5
D6
-
1477.53
436.5
D7
-
1846.35 436.5
D8
-
1953
D9
-
1930.05 436.5
Description
LCD backplane output
[2]
dummy pad
436.5
[1]
For most applications SDA and SDAACK are shorted together; see Section 8.
[2]
The dummy pads are connected to VSS but are not tested.
Table 25.
Gold bump hardness
Type number
Min
Max
Unit[1]
PCA85233UG/2DA/Q1
60
120
HV
[1]
Pressure of diamond head: 10 g to 50 g.
5()
5()
6
&
DDK
The approximate positions of the alignment marks are shown in Figure 27.
Fig 28. Alignment marks of PCA85233
Table 26. Alignment mark locations
All x/y coordinates represent the position of the REF point (see Figure 28) with respect to the center
(x/y = 0) of the chip; see Figure 27.
PCA85233
Product data sheet
Symbol
Size (m)
X (m)
Y (m)
S1
81 81
1916.1
45
C1
81 81
1855.8
45
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
43 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
17. Handling information
All input and output pins are protected against ElectroStatic Discharge (ESD) under
normal handling. When handling Metal-Oxide Semiconductor (MOS) devices ensure that
all normal precautions are taken as described in JESD625-A, IEC 61340-5 or equivalent
standards.
18. Packing information
18.1 Packing information on the tray
-
$
+
%
$
$
[
;
.
)
GLH
(
GHWDLO;
'
\
\
[
*
)
(
&
2
1
/
0
6(&7,21$$
<
'LPHQVLRQVLQPP
GHWDLO<
DDD
Schematic drawing, not drawn to scale. Top side view. For dimensions, see Table 27. Tray has pockets on both, top side and
bottom side. The IC is stored with the active side up. To get the active side down, turn the tray.
Fig 29. Tray details of PCA85233UG
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
44 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
Table 27. Specification of 3 inch tray details
Tray details are shown in Figure 29. Nominal values without production tolerances.
Tray details
Dimensions
A
B
C
D
E
F
G
H
J
K
L
M
N
O
Unit
6.0
2.5
4.26
1.17
76.0
68.0
60.0
6.75
8.0
62.5
4.2
2.6
3.2
0.48
mm
Number of pockets
x direction
y direction
11
26
SLQ
DDD
The orientation of the IC in a pocket with active side up is indicated by the position of pin 1 with
respect to the chamfer on the upper left corner of the tray.
Fig 30. Die alignment in the tray
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
45 of 54
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
NXP Semiconductors
Product data sheet
PCA85233
19. Appendix
19.1 LCD segment driver selection
Table 28.
Selection of LCD segment drivers
Type name
Number of elements at MUX
ffr (Hz)
Interface Package
AECQ100
PCA8553DTT
40
80
120 160 -
-
-
1.8 to 5.5 1.8 to 5.5 32 to 256[1]
N
N
40 to 105 I2C / SPI
TSSOP56 Y
PCA8546ATT
-
-
-
176 -
-
-
1.8 to 5.5 2.5 to 9
60 to 300[1]
N
N
40 to 95
I2C
TSSOP56 Y
PCA8546BTT
-
-
-
176 -
-
-
1.8 to 5.5 2.5 to 9
60 to 300[1]
N
N
40 to 95
SPI
TSSOP56 Y
1.8 to 5.5 2.5 to 9
60 to
300[1]
Y
40 to 95
I2C
TQFP64
Y
60 to
300[1]
Y
Y
40 to 95
SPI
TQFP64
Y
N
N
40 to 85
I2C
LQFP80
N
N
40 to 95
I2C
LQFP80
Y
Y
40 to 105
I2C
LQFP80
Y
TSSOP56 N
88
-
-
-
44
88
176 -
-
-
1.8 to 5.5 2.5 to 9
PCF85134HL
60
120 180 240 -
-
-
1.8 to 5.5 2.5 to 6.5 82
PCA8543AHL
60
60
120 180 240 120 -
240 -
-
-
1.8 to 5.5 2.5 to 8
2.5 to 5.5 2.5 to 9
82
Y
N
60 to
300[1]
300[1]
Y
PCF8545ATT
-
-
-
176 252 320 -
1.8 to 5.5 2.5 to 5.5 60 to
N
N
40 to 85
I2C
PCF8545BTT
-
-
-
176 252 320 -
1.8 to 5.5 2.5 to 5.5 60 to 300[1]
N
N
40 to 85
SPI
TSSOP56 N
PCF8536AT
-
-
-
176 252 320 -
1.8 to 5.5 2.5 to 9
60 to 300[1]
N
N
40 to 85
I2C
TSSOP56 N
1.8 to 5.5 2.5 to 9
60 to
300[1]
N
N
40 to 85
SPI
TSSOP56 N
300[1]
TSSOP56 Y
PCF8536BT
-
-
-
176 252 320 -
PCA8536AT
-
-
-
176 252 320 -
1.8 to 5.5 2.5 to 9
60 to
N
N
40 to 95
I2C
PCA8536BT
-
-
-
176 252 320 -
1.8 to 5.5 2.5 to 9
60 to 300[1]
N
N
40 to 95
SPI
TSSOP56 Y
PCF8537AH
44
88
-
176 276 352 -
1.8 to 5.5 2.5 to 9
60 to 300[1]
Y
Y
40 to 85
I2C
TQFP64
N
1.8 to 5.5 2.5 to 9
60 to
300[1]
Y
Y
40 to 85
SPI
TQFP64
N
300[1]
PCF8537BH
44
88
-
176 276 352 -
44
88
-
176 276 352 -
1.8 to 5.5 2.5 to 9
60 to
Y
Y
40 to 95
TQFP64
Y
PCA8537BH
44
88
-
176 276 352 -
1.8 to 5.5 2.5 to 9
60 to 300[1]
Y
Y
40 to 95
SPI
TQFP64
Y
PCA9620H
60
120 -
240 320 480 -
2.5 to 5.5 2.5 to 9
60 to 300[1]
Y
Y
40 to 105 I2C
LQFP80
Y
2.5 to 5.5 2.5 to 9
300[1]
Y
40 to 105
I2C
Bare die
Y
PCA9620U
60
120 -
240 320 480 -
60 to
Y
PCF8576DU
40
80
120 160 -
-
-
1.8 to 5.5 2.5 to 6.5 77
N
N
40 to 85
I2C
Bare die
N
PCF8576EUG
40
80
120 160 -
-
-
1.8 to 5.5 2.5 to 6.5 77
N
N
40 to 85
I2C
Bare die
N
N
40 to 105
I2C
Bare die
Y
N
40 to 85
I2C
Bare die
N
N
40 to 95
I2C
Bare die
Y
PCA8576FUG
PCF85133U
PCA85133U
40
80
80
80
120 160 -
160 240 320 160 240 320 -
-
-
1.8 to 5.5 2.5 to 8
200
N
1.8 to 5.5 2.5 to 6.5 82,
110[2]
1.8 to 5.5 2.5 to 8
110[2]
82,
N
N
PCA85233
46 of 54
© NXP Semiconductors N.V. 2015. All rights reserved.
PCA8537AH
I2C
Automotive 80 × 4 LCD driver for low multiplex rates
Rev. 4 — 6 May 2015
All information provided in this document is subject to legal disclaimers.
PCA8547BHT
PCA85134H
-
176 -
1:9
VLCD (V) VLCD (V)
Tamb (C)
charge temperature
pump
compensat.
1:2 1:3
44
1:6 1:8
VLCD (V)
1:1
PCA8547AHT
1:4
VDD (V)
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Selection of LCD segment drivers …continued
Type name
Number of elements at MUX
ffr (Hz)
VLCD (V) VLCD (V)
Tamb (C)
charge temperature
pump
compensat.
AECQ100
PCA85233UG
80
160 240 320 -
-
-
1.8 to 5.5 2.5 to 8
150, 220[2]
N
N
40 to 105 I2C
Bare die
Y
PCF85132U
160 320 480 640 -
-
-
1.8 to 5.5 1.8 to 8
60 to 90[1]
N
N
40 to 85
I2C
Bare die
N
Y
40 to 105
I2C
Bare die
Y
N
40 to 95
I2C
Bare die
Y
N
N
40 to 95
I2C
Bare die
Y
Y
Y
40 to 85
I2C / SPI
Bare die
N
Y
40 to 105
I2C
Bare die
Y
PCA85132U
408 -
160 320 480 640 -
PCA85232U
160 320 480 640 -
PCF8538UG
102 204 -
PCA8538UG
102 204 -
Software programmable.
[2]
Hardware selectable.
-
-
2.5 to 5.5 4 to 12
1.8 to 5.5 1.8 to 8
1.8 to 5.5 1.8 to 8
45 to
300[1]
60 to
90[1]
117 to
176[1]
408 612 816 918 2.5 to 5.5 4 to 12
45 to 300[1]
408 612 816 918 2.5 to 5.5 4 to 12
300[1]
45 to
Y
N
Y
/ SPI
/ SPI
PCA85233
47 of 54
© NXP Semiconductors N.V. 2015. All rights reserved.
Automotive 80 × 4 LCD driver for low multiplex rates
Rev. 4 — 6 May 2015
All information provided in this document is subject to legal disclaimers.
[1]
-
1:9
Interface Package
1:2 1:3
102 204 -
1:6 1:8
VLCD (V)
1:1
PCA8530DUG
1:4
VDD (V)
NXP Semiconductors
Product data sheet
PCA85233
Table 28.
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
20. Abbreviations
Table 29.
Abbreviations
Acronym
Description
CMOS
Complementary Metal-Oxide Semiconductor
COG
Chip-On-Glass
DC
Direct Current
HBM
Human Body Model
I2C
Inter-Integrated Circuit
IC
Integrated Circuit
ITO
Indium Tin Oxide
LCD
Liquid Crystal Display
MM
Machine Model
RAM
Random Access Memory
RC
Resistance-Capacitance
RMS
Root Mean Square
21. References
[1]
AN10170 — Design guidelines for COG modules with NXP monochrome LCD
drivers
[2]
AN10706 — Handling bare die
[3]
AN10853 — ESD and EMC sensitivity of IC
[4]
AN11267 — EMC and system level ESD design guidelines for LCD drivers
[5]
AN11494 — Cascading NXP LCD segment drivers
[6]
IEC 60134 — Rating systems for electronic tubes and valves and analogous
semiconductor devices
[7]
IEC 61340-5 — Protection of electronic devices from electrostatic phenomena
[8]
JESD22-A114 — Electrostatic Discharge (ESD) Sensitivity Testing Human Body
Model (HBM)
[9]
JESD22-A115 — Electrostatic Discharge (ESD) Sensitivity Testing Machine Model
(MM)
[10] JESD78 — IC Latch-Up Test
[11] JESD625-A — Requirements for Handling Electrostatic-Discharge-Sensitive
(ESDS) Devices
[12] UM10204 — I2C-bus specification and user manual
[13] UM10569 — Store and transport requirements
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
48 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
22. Revision history
Table 30.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
PCA85233 v.4
20150506
Product data sheet
-
PCA85233 v.3
Modifications:
•
Added rear side laser marking
PCA85233 v.3
20140926
Product data sheet
-
PCA85233 v.2
PCA85233 v.2
20140327
Product data sheet
-
PCA85233 v.1
PCA85233 v.1
20130917
Product data sheet
-
-
PCA85233
Product data sheet
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Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
49 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
23. Legal information
23.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
23.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
23.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
PCA85233
Product data sheet
Suitability for use in automotive applications — This NXP
Semiconductors product has been qualified for use in automotive
applications. Unless otherwise agreed in writing, the product is not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer's own
risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
50 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Bare die — All die are tested on compliance with their related technical
specifications as stated in this data sheet up to the point of wafer sawing and
are handled in accordance with the NXP Semiconductors storage and
transportation conditions. If there are data sheet limits not guaranteed, these
will be separately indicated in the data sheet. There are no post-packing tests
performed on individual die or wafers.
NXP Semiconductors has no control of third party procedures in the sawing,
handling, packing or assembly of the die. Accordingly, NXP Semiconductors
assumes no liability for device functionality or performance of the die or
systems after third party sawing, handling, packing or assembly of the die. It
is the responsibility of the customer to test and qualify their application in
which the die is used.
All die sales are conditioned upon and subject to the customer entering into a
written die sale agreement with NXP Semiconductors through its legal
department.
23.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
I2C-bus — logo is a trademark of NXP Semiconductors N.V.
24. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
51 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
25. Tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Table 28.
Table 29.
Table 30.
Ordering information . . . . . . . . . . . . . . . . . . . . .2
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . .2
Marking codes . . . . . . . . . . . . . . . . . . . . . . . . . .2
Pin description overview . . . . . . . . . . . . . . . . . .4
Definition of commands . . . . . . . . . . . . . . . . . . .5
Mode-set command bit description . . . . . . . . . .5
Load-data-pointer command bit description . . .5
Device-select command bit description . . . . . . .6
Bank-select command bit description[1] . . . . . . .6
Blink-select command bit description . . . . . . . .6
LCD frame frequencies . . . . . . . . . . . . . . . . . . .7
Blink frequencies . . . . . . . . . . . . . . . . . . . . . . . .8
Standard RAM filling in 1:3 multiplex drive
mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Entire RAM filling by rewriting in 1:3 multiplex
drive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Selection of possible display configurations . . .14
Biasing characteristics . . . . . . . . . . . . . . . . . . .15
I2C slave address byte . . . . . . . . . . . . . . . . . . .26
Control byte description . . . . . . . . . . . . . . . . . .28
Limiting values . . . . . . . . . . . . . . . . . . . . . . . . .30
Static characteristics . . . . . . . . . . . . . . . . . . . .31
Dynamic characteristics . . . . . . . . . . . . . . . . . .33
Addressing cascaded PCA85233 . . . . . . . . . .36
Dimensions of PCA85233UG . . . . . . . . . . . . .40
Bump locations of PCA85233UG . . . . . . . . . . .40
Gold bump hardness . . . . . . . . . . . . . . . . . . . .43
Alignment mark locations . . . . . . . . . . . . . . . .43
Specification of 3 inch tray details. . . . . . . . . . .45
Selection of LCD segment drivers . . . . . . . . . .46
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . .48
Revision history . . . . . . . . . . . . . . . . . . . . . . . .49
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
52 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
26. Figures
Fig 1.
Fig 2.
Fig 3.
Fig 4.
Fig 5.
Fig 6.
Fig 7.
Fig 8.
Fig 9.
Fig 10.
Fig 11.
Fig 12.
Fig 13.
Fig 14.
Fig 15.
Fig 16.
Fig 17.
Fig 18.
Fig 19.
Fig 20.
Fig 21.
Fig 22.
Fig 23.
Fig 24.
Fig 25.
Fig 26.
Fig 27.
Fig 28.
Fig 29.
Fig 30.
Rear side laser marking . . . . . . . . . . . . . . . . . . . . .2
Block diagram of PCA85233 . . . . . . . . . . . . . . . . .3
Pin configuration for PCA85233 . . . . . . . . . . . . . .4
Display RAM bitmap . . . . . . . . . . . . . . . . . . . . . . .9
Relationships between LCD layout, drive mode,
display RAM filling order, and display data
transmitted over the I2C-bus . . . . . . . . . . . . . . . .10
Example of displays suitable for PCA85233 . . . .14
Typical system configuration . . . . . . . . . . . . . . . .15
Electro-optical characteristic: relative
transmission curve of the liquid . . . . . . . . . . . . . .17
Static drive mode waveforms . . . . . . . . . . . . . . . .18
Waveforms for the 1:2 multiplex drive mode
with 1⁄2 bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Waveforms for the 1:2 multiplex drive mode
with 1⁄3 bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Waveforms for the 1:3 multiplex drive mode
with 1⁄3 bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Waveforms for the 1:4 multiplex drive mode
with 1⁄3 bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Definition of START and STOP conditions. . . . . .25
System configuration . . . . . . . . . . . . . . . . . . . . . .25
Acknowledgement on the I2C-bus . . . . . . . . . . . .26
I2C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . .27
Control byte format . . . . . . . . . . . . . . . . . . . . . . .27
Device protection diagram . . . . . . . . . . . . . . . . . .28
Current consumption with respect to external
clock frequency . . . . . . . . . . . . . . . . . . . . . . . . . .32
Frame frequency with respect to temperature . . .34
Driver timing waveforms . . . . . . . . . . . . . . . . . . .35
I2C-bus timing waveforms . . . . . . . . . . . . . . . . . .35
Cascaded PCA85233 configuration. . . . . . . . . . .36
Synchronization of the cascade for the various
PCA85233 drive modes . . . . . . . . . . . . . . . . . . . .37
Bare die outline of PCA85233UG . . . . . . . . . . . .39
Alignment marks of PCA85233 . . . . . . . . . . . . . .43
Tray details of PCA85233UG. . . . . . . . . . . . . . . .44
Die alignment in the tray . . . . . . . . . . . . . . . . . . .45
PCA85233
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 6 May 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
53 of 54
PCA85233
NXP Semiconductors
Automotive 80 × 4 LCD driver for low multiplex rates
27. Contents
1
2
3
3.1
4
5
6
6.1
6.2
7
7.1
7.2
7.2.1
7.2.1.1
7.2.1.2
7.2.2
7.2.3
7.3
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.4
7.5
7.6
7.7
7.7.1
7.8
7.8.1
7.8.2
7.8.3
7.8.4
7.9
7.10
8
8.1
8.2
8.3
8.4
8.5
8.6
8.7
9
10
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 2
Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
Functional description . . . . . . . . . . . . . . . . . . . 5
Commands of PCA85233 . . . . . . . . . . . . . . . . . 5
Clock and frame frequency. . . . . . . . . . . . . . . . 6
Oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Internal clock . . . . . . . . . . . . . . . . . . . . . . . . . . 7
External clock . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Frame frequency . . . . . . . . . . . . . . . . . . . . . . . 7
Blinking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Display RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Data pointer . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Subaddress counter . . . . . . . . . . . . . . . . . . . . 11
RAM writing in 1:3 multiplex drive mode. . . . . 11
Writing over the RAM address boundary . . . . 12
Output bank selector . . . . . . . . . . . . . . . . . . . 12
Input bank selector . . . . . . . . . . . . . . . . . . . . . 13
Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Possible display configurations . . . . . . . . . . . 14
LCD bias generator . . . . . . . . . . . . . . . . . . . . 15
LCD voltage selector . . . . . . . . . . . . . . . . . . . 15
Electro-optical performance . . . . . . . . . . . . . . 17
LCD drive mode waveforms . . . . . . . . . . . . . . 18
Static drive mode . . . . . . . . . . . . . . . . . . . . . . 18
1:2 Multiplex drive mode. . . . . . . . . . . . . . . . . 19
1:3 Multiplex drive mode. . . . . . . . . . . . . . . . . 21
1:4 Multiplex drive mode. . . . . . . . . . . . . . . . . 22
Backplane outputs . . . . . . . . . . . . . . . . . . . . . 23
Segment outputs. . . . . . . . . . . . . . . . . . . . . . . 23
Characteristics of the I2C-bus . . . . . . . . . . . . 24
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
START and STOP conditions . . . . . . . . . . . . . 24
System configuration . . . . . . . . . . . . . . . . . . . 25
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 25
I2C-bus controller . . . . . . . . . . . . . . . . . . . . . . 26
Input filters . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
I2C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . 26
Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 28
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11
12
13
14
14.1
15
15.1
16
17
18
18.1
19
19.1
20
21
22
23
23.1
23.2
23.3
23.4
24
25
26
27
Limiting values . . . . . . . . . . . . . . . . . . . . . . . .
Static characteristics . . . . . . . . . . . . . . . . . . .
Dynamic characteristics. . . . . . . . . . . . . . . . .
Application information . . . . . . . . . . . . . . . . .
Cascaded operation. . . . . . . . . . . . . . . . . . . .
Test information . . . . . . . . . . . . . . . . . . . . . . .
Quality information . . . . . . . . . . . . . . . . . . . . .
Bare die outline . . . . . . . . . . . . . . . . . . . . . . . .
Handling information . . . . . . . . . . . . . . . . . . .
Packing information . . . . . . . . . . . . . . . . . . . .
Packing information on the tray . . . . . . . . . . .
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LCD segment driver selection . . . . . . . . . . . .
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . .
References. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision history . . . . . . . . . . . . . . . . . . . . . . .
Legal information . . . . . . . . . . . . . . . . . . . . . .
Data sheet status . . . . . . . . . . . . . . . . . . . . . .
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . .
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact information . . . . . . . . . . . . . . . . . . . .
Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
31
33
35
35
38
38
39
44
44
44
46
46
48
48
49
50
50
50
50
51
51
52
53
54
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP Semiconductors N.V. 2015.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 6 May 2015
Document identifier: PCA85233