pcf8534 NXP Semiconductors, pcf8534 Datasheet - Page 23

• Manufacturer Part Number: pcf8534
• Description: Universal Driver Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 8.
PCF8534_0
Preliminary datasheet
Command
Mode set
Load data pointer
Device select
Bank select
Blink
Definition of PCF8534 commands
7.9 Command decoder
The command decoder identifies command bytes that arrive on the I
commands available to the PCF8534 are defined in
0 P6 P5 P4 P3 P2 P1 P0
Table 9.
Table 10.
Table 11.
OPCODE
1 1 0 0 E B M1 M0
1 1 1 0 0 A2 A1 A0
1 1 1 1 1 0 I O
1 1 1 1 0 A BF BF
LCD drive mode
Drive mode
static
1:2
1:3
1:4
LCD bias
1
1
Display status
disabled (blank)
enabled
⁄
⁄
3
2
bias
bias
Mode set option 1
Mode set option 2
Mode set option 3
1 0
Rev. 00.05 — 20 February 2007
Backplane
1 BP
MUX (2BP)
MUX (3BP)
MUX (4BP)
Options
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Universal LCD driver for low multiplex rates
Description
defines LCD drive mode
defines LCD bias configuration
defines display status; the possibility to disable
the display allows implementation of blinking
under external control
7 bits of immediate data, bits P6 to P0, are
transferred to the data pointer to define one of 8
hardware subaddresses
3 bits of immediate data, bits A0 to A3 are
transferred to the subaddress counter to define
one of 8 hardware subaddresses
defines input bank selection (storage of arriving
display data)
defines output bank selection (retrieval of LCD
display data); the BANK SELECT command has
no effect in 1:3 or 1:4 multiplex drive modes
defines the blinking frequency
selects the blinking mode; normal operation with
frequency set by BF1, BF0 or blinking by
alteration of display RAM banks. Alteration
blinking does not apply in 1:3 or 1:4 multiplex
drive modes.
Bits
M1
0
1
1
0
Bit B
0
1
Bit E
0
1
Table
8.
M0
1
0
1
0
2
C-bus. The five
PCF8534
© NXP B.V. 2007. All rights reserved.
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