PCF2119VU-2-F2 Ver la hoja de datos (PDF) - NXP Semiconductors.
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PCF2119VU-2-F2 Datasheet PDF : 79 Pages
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NXP Semiconductors
PCF2119x
LCD controllers/drivers
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).
Table 10.
Symbol
RS
R/W
Register access selection
Value
Description
register select
0
instruction register[1]
1
data register[2]
read/write
0
write operation
1
read operation
[1] 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 Section 10.2.1.2).
[2] Write and read access.
Details of the instructions are explained in subsequent sections.
10.1 Data register
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.
10.2 Instruction 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 Section 10.2.1.1) sets the chip into extended
instruction set mode.
PCF2119X_5
Product data sheet
Rev. 05 — 13 August 2009
© NXP B.V. 2009. All rights reserved.
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