PCF2119X Datasheet, PDF (43/79 Pages) NXP Semiconductors – LCD controllers/drivers

NXP Semiconductors
PCF2119x
LCD controllers/drivers
• 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.
acknowledgement
from PCF2119x
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
Fig 31. Master transmits to slave receiver; write mode
A 0 RS CONTROL BYTE A
1 byte
Co
DATA BYTE
AP
n ≥ 0 bytes
update
data pointer
mgk899
acknowledgement
S
S 0 1 1 1 0 1 A 0 A 1 RSCONTROL BYTE A
0
DATA BYTE
A 0 RSCONTROL BYTE A
DATA BYTE⁽¹⁾ A
slave address
R/W Co
2n ≥ 0 bytes
1 byte
Co
n ≥ 0 bytes
acknowledgement
acknowledgement
no acknowledgement
S
SLAVE
ADDRESS
S
A1A
0
DATA BYTE
A
DATA BYTE
1P
R/W Co
n bytes
update
data pointer
last byte
update
data pointer
Last data byte is a dummy byte (may be omitted).
Fig 32. Master reads after setting word address; writes word address, set RS; Read_data
mgg003
PCF2119X_5
Product data sheet
Rev. 05 — 13 August 2009
© NXP B.V. 2009. All rights reserved.
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