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PCF8578H датащи(PDF) 21 Page - NXP Semiconductors

номер детали PCF8578H
подробное описание детали  LCD row/column driver for dot matrix graphic displays
PDF  48 Pages
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF8578H датащи(HTML) 21 Page - NXP Semiconductors

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2003 Apr 14
21
Philips Semiconductors
Product specification
LCD row/column driver for
dot matrix graphic displays
PCF8578
8.1
Command decoder
The command decoder identifies command bytes that
arrive on the I2C-bus. The most-significant bit of a
command is the continuation bit C (see Fig.14). When this
bit is set, it indicates that the next byte to be transferred will
also be a command. If the bit is reset, it indicates the
conclusion of the command transfer. Further bytes will be
regarded as display data. Commands are transferred in
WRITE mode only.
The five commands available to the PCF8578 are defined
in Tables 5 and 6.
Fig.14 General information of command byte.
MSA833
REST OF OPCODE
C
MSB
LSB
C = 0; last command.
C = 1; commands continue.
Table 5
Summary of commands
Note
1. C = command continuation bit. D = may be a logic 1 or 0.
COMMAND
OPCODE(1)
DESCRIPTION
SET MODE
C
1
0
D
D
D
D
D
multiplex rate, display status, system type
SET START BANK
C
1
1
1
1
1
D
D
defines bank at top of LCD
DEVICE SELECT
C
1
1
0
D
D
D
D
defines device subaddress
RAM ACCESS
C
1
1
1
D
D
D
D
graphic mode, bank select (D D D D
≥ 12 is not
allowed; see SET START BANK opcode)
LOAD X-ADDRESS
C
0
D
D
D
D
D
D
0 to 39



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