PCF2119X-2 Datasheet, PDF (33/60 Pages) NXP Semiconductors – LCD controllers/drivers

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acknowledgement
S
S 0 1 1 1 0 1 A 0 A 1 RS CONTROL BYTE A
0
DATA BYTE
slave address
R/W Co
2n 0 bytes
A 0 RS CONTROL BYTE A
DATA BYTE⁽¹⁾
A
1 byte
Co
n ≥ 0 bytes
acknowledgement
acknowledgement
no acknowledgement
S
SLAVE
ADDRESS
S
A1A
0
DATA BYTE
A
R/W Co
n bytes
update
data pointer
DATA BYTE
1P
last byte
update
data pointer MGG003
(1) Last data byte is a dummy byte (may be omitted).
Fig.23 Master reads after setting word address; writes word address, set RS; ‘read data’.