PCF8566T NXP Semiconductors, PCF8566T Datasheet - Page 7

• Manufacturer Part Number: PCF8566T
• Manufacturer: NXP Semiconductors

Specifications of PCF8566T

• Operating Supply Voltage (typ): 3.3/5V
• Number Of Digits: 12
• Number Of Segments: 96
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: VSO
• Pin Count: 40
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Frequency (max): 315KHz
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 6V
• Lead Free Status / Rohs Status: Not Compliant

NXP Semiconductors
PCF8566_7
Product data sheet
7.1 Power-on reset
7.2 LCD bias generator
7.3 LCD voltage selector
At power-on the PCF8566 resets to the following starting conditions:
Do not transfer data on the I
action to complete.
The full-scale LCD voltage (V
temperature compensated externally through the V
Fractional LCD biasing voltages are obtained from an internal voltage divider comprising
three series resistors connected between V
switched out of the circuit to provide a
configuration.
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
mode-set commands from the command decoder. The biasing configurations that apply to
the preferred modes of operation, together with the biasing characteristics as functions of
V
Fig 4. Typical system configuration
•
•
•
•
•
•
•
LCD
All backplane outputs are set to V
All segment outputs are set to V
Drive mode 1:4 multiplex with
Blinking is switched off
Input and output bank selectors are reset (as defined in
The I
The data pointer and the subaddress counter are cleared
and the resulting discrimination ratios (D), are given in
V
V
DD
SS
2
C-bus interface is initialized
CONTROLLER
PROCESSOR/
MICRO-
MICRO-
HOST
R
2 C
Rev. 07 — 25 February 2009
t
rise
bus
2
C-bus after a power-on for at least 1 ms to allow the reset
oper
) is obtained from V
OSC
SDA
1
SCL
3
DD
bias is selected
DD
1
2
6
1
7
2
A0
5
bias voltage level for the 1:2 multiplex
Universal LCD driver for low multiplex rates
V
8
DD
DD
PCF8566
A1
and V
9
A2
12
V
10
17 to 40
13 to 16
LCD
LCD
SA0
DD
LCD
11
supply to pin 12.
V
. The center resistor can be
SS
V
24 segment drives
LCD
4 backplanes
Table
Table
. The LCD voltage may be
8)
5.
PCF8566
© NXP B.V. 2009. All rights reserved.
LCD PANEL
(up to 96
elements)
mgg385
7 of 48