PCF8813 View Datasheet(PDF) - Philips Electronics
Part Name
Description
MFG CO.
'PCF8813' PDF : 72 Pages View PDF
Philips Semiconductors
(67 + 1) × 102 pixels matrix LCD driver
Product speciï¬cation
PCF8813
handbook, full pagewidth
acknowledge
from PCF8813
acknowledge
from PCF8813
acknowledge
from PCF8813
acknowledge
from PCF8813
acknowledge
from PCF8813
SS
Sr 0 1 1 1 1 A A 0 A 1 D/C control byte A
10
data byte
slave address
R/W CO
2n ≥ 0 bytes
A 0 D/C control byte A
data byte
AP
1 byte
CO
n ≥ 0 bytes
MSB . . . . . . . . . . . LSB
MGU634
Fig.31 Master transmits in Hs-mode to slave receiver; write mode.
handbook, full pagewidth
acknowledgement
from PCF8813
NOT acknowledgement
from Master
SS
Sr 0 1 1 1 1 A A 1 A status information A P
10
slave address
R/W
STOP condition
MGU635
Fig.32 Master receives from slave transmitter (status register is read); read mode.
10.3 Command decoder
The command decoder identifies command words that
arrive on the I2C-bus.
• Pairs of bytes
– first byte determines whether information is display
or instruction data
– second byte contains information.
• Stream of information bytes after CO = 0; display or
instruction data depending on last D/C-bit.
The most significant bit of a control byte is the continuation
bit CO. If this bit is logic 1, it indicates that only one data
byte, either command or RAM data, will follow. If the bit is
logic 0, it indicates that a series of data bytes, either
command or RAM data, may follow. The DB6 bit of a
control byte is the RAM data/command bit D/C. When this
bit is logic 1, it indicates that a RAM data byte will be
transferred next. If the bit is at logic 0, it indicates that a
command byte will be transferred next.
2004 Mar 05
27
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