pcf2113du/f4 NXP Semiconductors, pcf2113du/f4 Datasheet - Page 23

• Manufacturer Part Number: pcf2113du/f4
• Description: Pcf2113x Lcd Controllers/drivers
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8
Only two PCF2113x registers, the Instruction Register (IR)
and the Data Register (DR) can be directly controlled by
the microcontroller. Before internal operation, control
information is stored temporarily in these registers, to
allow interfacing to various types of microcontrollers which
operate at different speeds or to allow interface to
peripheral control ICs.
The instruction set for I
Table 4.
The PCF2113x operation is controlled by the instructions
shown in Table 5 together with their execution time.
Details are explained in subsequent sections.
Instructions are of 4 types, those that:
1. Designate PCF2113x functions such as display
2. Set internal RAM addresses
3. Perform data transfer with internal RAM
4. Others.
Table 4 Instruction set for I
Note
1. R/W is set together with the slave address.
2001 Dec 19
Co RS 0
LCD controllers/drivers
format, data length, etcetera.
INSTRUCTIONS
CONTROL BYTE
0
0
2
C-bus commands is given in
0
2
C-bus commands
0
0
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 note 1
COMMAND BYTE
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In normal use, category 3 instructions are used most
frequently. However, automatic incrementing by 1
(or decrementing by 1) of internal RAM addresses after
each data write lessens the microcontroller program load.
The display shift in particular can be performed
concurrently with display data write, enabling the designer
to develop systems in minimum time with maximum
programming efficiency.
During internal operation, no instructions other than the
‘read busy flag’ and ‘read address’ instructions will be
executed. Because the busy flag is set to a logic 1 while an
instruction is being executed, check to ensure it is a logic 0
before sending the next instruction or wait for the
maximum instruction execution time, as given in Table 5.
An instruction sent while the busy flag is logic 1 will not be
executed.
I
2
C-BUS COMMANDS
Product specification
PCF2113x