PCF2119AU/2DA/2 NXP [NXP Semiconductors], PCF2119AU/2DA/2 Datasheet - Page 43

• Manufacturer Part Number: PCF2119AU/2DA/2
• Description: LCD controllers/drivers
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF2119X_5
Product data sheet
Fig 31. Master transmits to slave receiver; write mode
Fig 32. Master reads after setting word address; writes word address, set RS; Read_data
S
0 1 1 1 0 1
slave address
S
0 1 1 1 0 1
Last data byte is a dummy byte (may be omitted).
slave address
acknowledgement
from PCF2119x
S
A
0
acknowledgement
R/W
0 A
S
A
0
R/W
0 A
•
•
Co
1
Arbitration: procedure to ensure that if more than one master simultaneously tries to
control the bus, only one is allowed to do so and the message is not corrupted.
Synchronization: procedure to synchronize the clock signals of two or more devices.
RS
Co
S
1
RS
CONTROL BYTE A
CONTROL BYTE A
ADDRESS
SLAVE
2n
acknowledgement
2n
S
A
0
R/W
0 bytes
1 A
0 bytes
Rev. 05 — 13 August 2009
Co
DATA BYTE
DATA BYTE
DATA BYTE
n bytes
acknowledgement
data pointer
A
A
update
Co
0
A
Co
RS
0
RS
CONTROL BYTE A
CONTROL BYTE A
1 byte
1 byte
DATA BYTE
last byte
no acknowledgement
data pointer
DATA BYTE
update
LCD controllers/drivers
1
n
P
PCF2119x
DATA BYTE
0 bytes
n
© NXP B.V. 2009. All rights reserved.
(1)
0 bytes
mgg003
A
data pointer
A
update
mgk899
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P