PCF8576CH NXP Semiconductors, PCF8576CH Datasheet - Page 9

• Manufacturer Part Number: PCF8576CH
• Manufacturer: NXP Semiconductors

Specifications of PCF8576CH

• Operating Supply Voltage (typ): 2.5/3.3/5V
• Number Of Digits: 20
• Number Of Segments: 160
• Package Type: LQFP
• Pin Count: 64
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Frequency (max): 315KHz
• Operating Supply Voltage (min): 2V
• Operating Supply Voltage (max): 6V
• Lead Free Status / Rohs Status: Compliant

NXP Semiconductors
7. Functional description
PCF8576C_9
Product data sheet
7.1 Power-on-reset
The PCF8576C is a versatile peripheral device designed to interface any
microprocessor or microcontroller to a wide variety of LCDs. It can directly drive any static
or multiplexed LCD containing up to 4 backplanes and up to 40 segments.
The display configurations possible with the PCF8576C depend on the number of active
backplane outputs required. Display configuration selection is shown in
display configurations given in
Figure
Table 4.
The host microprocessor or microcontroller maintains the 2-line I
channel with the PCF8576C.
Biasing voltages for the multiplexed LCD waveforms are generated internally, removing
the need for an external bias generator. The internal oscillator is selected by connecting
pin OSC to V
power supplies (pins V
At power-on the PCF8576C resets to the following starting conditions:
Number of:
Backplanes Elements
4
3
2
1
Fig 6.
•
•
•
•
All backplane and segment outputs are set to V
The selected drive mode is 1:4 multiplex with
Blinking is switched off
Input and output bank selectors are reset (as defined in
6.
V
V
DD
SS
CONTROLLER
PROCESSOR/
Typical system configuration
Display configurations
MICRO-
MICRO-
HOST
160
120
80
40
SS
. The only other connections required to complete the system are the
R
2C
t
r
B
DD
Rev. 09 — 9 July 2009
, V
7 segment numeric
Digits
20
15
10
5
SS
Table 4
and V
OSC
SDA
SCL
LCD
can be implemented in the typical system shown in
A0
Indicator
symbols
20
15
10
5
) and the LCD panel selected for the application.
V
PCF8576C
DD
A1
Universal LCD driver for low multiplex rates
A2
V
LCD
SA0 V
1
3
DD
14-segment numeric
Characters
10
8
5
2
bias
SS
40 segment drives
4 backplanes
Table
Indicator
symbols
20
8
10
12
2
C-bus communication
8)
PCF8576C
© NXP B.V. 2009. All rights reserved.
LCD PANEL
Table
(up to 160
elements)
013aaa098
Dot matrix
160 (4
120 (3
80 (2
40 (1
4. All of the
9 of 56
40)
40)
40)
40)