PCF2119AU/2DA/2 NXP [NXP Semiconductors], PCF2119AU/2DA/2 Datasheet - Page 25
PCF2119AU/2DA/2
Manufacturer Part Number
PCF2119AU/2DA/2
Description
LCD controllers/drivers
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCF2119AU2DA2.pdf
(79 pages)
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NXP Semiconductors
PCF2119X_5
Product data sheet
10.1 Data register
10.2 Instruction register
The RS bit determines which register will be accessed and the R/W bit indicates if it is a
read or a write operation (see
Table 10.
[1]
[2]
Details of the instructions are explained in subsequent sections.
The data register temporarily stores data to be read from the DDRAM and CGRAM. Prior
to being read by the Read_data instruction, data from the DDRAM or CGRAM,
corresponding to the address in the instruction register, is written to the data register.
The instruction register stores instruction codes such as Clear_display, Curs_disp_shift,
and address information for the Display Data RAM (DDRAM) and Character Generator
RAM (CGRAM). The instruction register can be written to but not read from by the system
controller.
The instruction register is sectioned into basic, standard and extended instructions. Bit
H = 1 of the Function_set instruction (see
instruction set mode.
Symbol
RS
R/W
There is only write access to the instruction register, but read access to the busy flag (BF) and the address
counter (AC) of the BF_AC instruction (see
Write and read access.
Register access selection
Value
0
1
0
1
Rev. 05 — 13 August 2009
Description
register select
read/write
instruction register
data register
write operation
read operation
Table
10).
Section
[2]
Section
10.2.1.2).
[1]
10.2.1.1) sets the chip into extended
LCD controllers/drivers
PCF2119x
© NXP B.V. 2009. All rights reserved.
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