參數(shù)資料
型號(hào)： 935200540557
廠商： NXP SEMICONDUCTORS
元件分類： 顯示驅(qū)動(dòng)器
英文描述： LIQUID CRYSTAL DISPLAY DRIVER, PQFP64
封裝： PLASTIC, LQFP-64
文件頁數(shù)： 14/46頁
文件大?。?/td> 287K
代理商： 935200540557
1998 Sep 08
21
Philips Semiconductors
Product specication
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
DDDDD
multiplex rate, display status, system type
SET START BANK
C
11111
D
denes bank at top of LCD
DEVICE SELECT
C
1
0
DDDD
denes device subaddress
RAM ACCESS
C
1
DDDD
graphic mode, bank select (D D D D
≥ 12 is not
allowed; see SET START BANK opcode)
LOAD X-ADDRESS
C
0
D
DDDDD
0 to 39
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