PCF8533U PHILIPS [NXP Semiconductors], PCF8533U Datasheet - Page 5

• Manufacturer Part Number: PCF8533U
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
5
Note
1. For most applications SDA and SDAACK will be shorted together; see Chapter 7.
6
The PCF8533 is a versatile peripheral device designed to interface any microprocessor/microcontroller to a wide variety
of LCDs. It can directly drive any static or multiplexed LCD containing up to four backplanes and up to 80 segments.
The display configurations possible with the PCF8533 depend on the number of active backplane outputs required; a
selection of display configurations is given in Table 1.
All of the display configurations given in Table 1 can be implemented in the typical system shown in Fig.2.
The host microprocessor/microcontroller maintains the 2-line I
The internal oscillator is selected by connecting pad OSC to V
LCD waveforms are generated internally. The only other connections required to complete the system are to the power
supplies (V
Table 1 Selection of display configurations
1999 Jul 30
SDAACK
SDA
SCL
CLK
V
SYNC
OSC
A0, A1 and A2
SA0
V
V
BP0, BP1, BP2 and BP3
S0 to S79
BACKPLANES SEGMENTS
DD
SS
LCD
Universal LCD driver for low multiplex rates
PINNING
FUNCTIONAL DESCRIPTION
4
3
2
1
NUMBER OF
DD
SYMBOL
, V
SS
and V
320
240
160
80
LCD
) and the LCD panel selected for the application.
7-SEGMENTS NUMERIC
DIGITS
40
30
20
10
17, 99, 16 and 98
10, 11 and 12
18 to 97
2 and 3
4 and 5
PAD
13
14
15
1
6
7
8
9
INDICATOR
SYMBOLS
40
30
20
10
5
2
SS
C-bus communication channel with the PCF8533.
. The appropriate biasing voltages for the multiplexed
I
I
I
external clock input/output
supply voltage
cascade synchronization input/output
internal oscillator enable input
subaddress inputs
I
logic ground
LCD supply voltage
LCD backplane outputs
LCD segment outputs
CHARACTERS
2
2
2
2
C-bus acknowledge output; note 1
C-bus serial data input; note 1
C-bus serial clock input
C-bus slave address input; bit 0
ALPHANUMERIC
20
16
10
5
14-SEGMENTS
DESCRIPTION
INDICATOR
SYMBOLS
40
16
20
10
Product specification
320 dots (4
240 dots (3
160 dots (2
80 dots (1
PCF8533
DOT MATRIX
80)
80)
80)
80)