PCF8566 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF8566' PDF : 48 Pages View PDF
NXP Semiconductors
PCF8566
Universal LCD driver for low multiplex rates
8.3 Command decoder
The command decoder identifies command bytes that arrive on the I2C-bus. All available
commands carry a continuation bit C in their most significant bit position as shown in
Figure 18. When this bit is set, it indicates that the next byte of the transfer to arrive will
also represent a command. If this bit is reset, it indicates that the command byte is the last
in the transfer. Further bytes will be regarded as display data.
The five commands available to the PCF8566 are defined in Table 8.
MSB
C
LSB
REST OF OPCODE
(1) C = 0; last command.
(2) C = 1; commands continue.
Fig 18. General format of byte command
msa833
Table 8. Definition of PCF8566 commands
Command Opcode
Reference Description
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Mode set
C 1 0 LP E B M1 M0 Section 8.3.1 defines LCD drive mode, LCD bias
configuration, display status and
power dissipation mode
Load data
C0
0
P4 P3 P2 P1 P0 Section 8.3.2 data pointer to define one of 24
pointer
display RAM addresses
Device select C 1 1 0 0 A2 A1 A0 Section 8.3.3 define one of eight hardware
subaddresses
Bank select C 1 1 1 1 0 I
O Section 8.3.4 bit I: defines input bank selection
(storage of arriving display data);
bit O: defines output bank selection
(retrieval of LCD display data)
Blink
C 1 1 1 0 A BF1 BF0 Section 8.3.5 defines the blink frequency and blink
mode
8.3.1 Mode set command
Table 9. LCD drive mode command bit description
LCD drive mode
Bit
Drive mode
Backplane
M1
M0
static
BP0
0
1
1:2
BP0, BP1
1
0
1:3
BP0, BP1. BP2
1
1
1:4
BP0, BP1. BP2, BP3
0
0
PCF8566_7
Product data sheet
Rev. 07 — 25 February 2009
© NXP B.V. 2009. All rights reserved.
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