pcf8814 NXP Semiconductors, pcf8814 Datasheet - Page 25

• Manufacturer Part Number: pcf8814
• Description: Pcf8814 65 X 96 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
10.3
The command decoder identifies command words that
arrive on the I
The most-significant bit of a control byte is the continuation
bit CO. If CO = 1, it indicates that only one data byte, either
command or RAM data, will follow. If CO = 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 D/C = 1, it indicates that a
Table 6 ID2, ID1 and VM
Note
1. X = undefined.
Table 7 Temperature sensor
Note
1. X = undefined.
2003 Mar 13
Pairs of bytes: the first byte determines whether
information is display or instruction data; the second
byte holds the information
Stream of information bytes after CO = 0: display or
instruction data depending on the last D/C state.
65
D7
D7
X
X
Command decoder
96 pixels matrix LCD driver
2
C-bus:
TD6
D6
D6
X
TD5
D5
D5
X
TD4
D4
D4
X
25
RAM data byte will be transferred next. If D/C = 0, it
indicates that a command byte will be transferred next.
10.4
The I
interfaces. Two different status bytes can be read back
and are selected by first sending a Read instruction. A
RE-START or STOP-START must then be generated
followed by the slave address with the R/W bit set to read
in order to read the status register.
Sending the instruction to read ID1, ID2 or VM will select
the status byte shown in Table 6.
Sending the instruction to read back the temperature
sensor will select the status byte shown in Table 7.
TD3
D3
D3
2
X
C-bus read mode operates differently from the other
Read mode
TD2
VM
D2
D2
TD1
ID2
D1
D1
Objective specification
PCF8814
TD0
ID1
D0
D0