PCF85132U/2DA/1,02 NXP Semiconductors, PCF85132U/2DA/1,02 Datasheet - Page 21

• Manufacturer Part Number: PCF85132U/2DA/1,02
• Description: IC LCD DISPLAY DRVR UNCASED
• Manufacturer: NXP Semiconductors

Specifications of PCF85132U/2DA/1,02

• Display Type: LCD
• Configuration: Multiple
• Interface: I²C
• Digits Or Characters: Any Digit Type
• Current - Supply: 60µA
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
PCF85132
Product data sheet
7.14 Input bank selector
7.15 Blinker
The PCF85132 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 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 PCF85132 are very versatile. The whole display
can blink at frequencies selected by the blink-select command (see
The blink frequencies are fractions of the clock frequency. The ratios between the clock
and blink frequencies depend on the blink mode in which the device is operating (see
Table
Table 6.
Assuming that f
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 (see
In the 1:3 and 1:4 multiplex modes, where no alternate RAM bank is available, groups of
LCD elements can blink selectively by changing the display RAM data at fixed time
intervals.
The entire display can blink at a frequency other than the nominal blinking 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
Blink mode
off
1
2
3
14). The input bank selector functions independently to the output bank selector.
6).
Blink frequencies
clk
All information provided in this document is subject to legal disclaimers.
= 1.800 kHz.
Rev. 1 — 23 November 2010
Operating mode ratio
-
f
f
f
blink
blink
blink
=
=
=
----------- -
1536
-------- -
768
----------- -
3072
f
f
f
clk
clk
clk
Table
Table
LCD driver for low multiplex rates
10).
Blink frequency
blinking off
~2.34 Hz
~1.17 Hz
~0.59 Hz
15).
Table 15 on page
PCF85132
© NXP B.V. 2010. All rights reserved.
21 of 54
28).