PCF8576DT NXP Semiconductors, PCF8576DT Datasheet - Page 21

• Manufacturer Part Number: PCF8576DT
• Manufacturer: NXP Semiconductors

Specifications of PCF8576DT

• Operating Supply Voltage (typ): 2.5/3.3/5V
• Number Of Digits: 20
• Number Of Segments: 160
• Package Type: TSSOP
• Pin Count: 56
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Frequency (max): 400KHz
• Operating Supply Voltage (min): 1.8V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Supplier Unconfirmed

NXP Semiconductors
PCF8576D_9
Product data sheet
7.16.1 Bit transfer
7.16 Characteristics of the I
In the 1:3 and 1:4 drive modes, where no alternative RAM bank is available, groups of
LCD segments 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 blink frequency by
sequentially resetting and setting the display enable bit E at the required rate using the
mode-set command (see
Table 6.
[1]
The I
The two lines are a Serial Data Line (SDA) and a Serial Clock Line (SCL). Both lines must
be connected to a positive supply via a pull-up resistor when connected to the output
stages of a device. Data transfer may be initiated only when the bus is not busy.
One data bit is transferred during each clock pulse. The data on the SDA line must remain
stable during the HIGH period of the clock pulse as changes in the data line at this time
will be interpreted as a control signal (see
Blink mode
off
1
2
3
Fig 13. Bit transfer
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
2
C-bus is for bidirectional, two-line communication between different ICs or modules.
Blinking frequencies
clk
) of 1536 Hz (see
SDA
SCL
Rev. 09 — 25 August 2009
Section
Normal operating mode ratio
-
--------- -
768
------------ -
1536
------------ -
3072
f
f
f
clk
2
clk
clk
Section
C-bus
[1]
7.17).
data valid
data line
stable;
11).
Figure
Universal LCD driver for low multiplex rates
change
allowed
of data
13).
Nominal blink frequency
blinking off
2 Hz
1 Hz
0.5 Hz
mba607
PCF8576D
© NXP B.V. 2009. All rights reserved.
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