PCF8576DT/S400/2,1 NXP Semiconductors, PCF8576DT/S400/2,1 Datasheet - Page 23

• Manufacturer Part Number: PCF8576DT/S400/2,1
• Description: LCD Drivers 2.64KHz 50mA 400mW
• Manufacturer: NXP Semiconductors

Specifications of PCF8576DT/S400/2,1

• Rohs: yes
• Maximum Clock Frequency: 2.64 kHz
• Operating Supply Voltage: 1.8 V to 5.5 V
• Package / Case: TSSOP-56
• Maximum Power Dissipation: 400 mW
• Maximum Supply Current: 50 mA
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 2000

NXP Semiconductors
PCF8576D
Product data sheet
7.10.6 Input bank selector
7.11 Blinking
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.
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
The display blinking capabilities of the PCF8576D are very versatile. The whole display
can blink at frequencies selected by the blink-select command (see
frequencies are derived from the clock frequency. The ratio between the clock and blink
frequencies depends on the blink mode selected (see
An additional feature is for an arbitrary selection of LCD elements 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 alternative RAM bank is available, groups of
LCD elements can blink by selectively changing the display RAM data at fixed time
intervals.
The entire display can blink at a frequency other than the nominal 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 8.
[1]
Blink mode
off
1
2
3
Blink modes 1, 2 and 3 and the nominal blink frequencies 0.5 Hz, 1 Hz and 2 Hz correspond to an oscillator
frequency (f
14). The input bank selector functions independently to the output bank selector.
Blinking frequencies
clk
) of 1536 Hz (see
All information provided in this document is subject to legal disclaimers.
Rev. 13 — 10 May 2012
Normal operating mode ratio
-
--------- -
768
------------ -
1536
------------ -
3072
f
f
f
clk
clk
clk
Section
[1]
12).
Universal LCD driver for low multiplex rates
Table
Table
11).
Nominal blink frequency
blinking off
2 Hz
1 Hz
0.5 Hz
15).
PCF8576D
Table
© NXP B.V. 2012. All rights reserved.
15). The blink
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