PCF2119AU/2DA/2 NXP [NXP Semiconductors], PCF2119AU/2DA/2 Datasheet - Page 58

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

NXP Semiconductors
Table 38.
Table 39.
PCF2119X_5
Product data sheet
Step
1
2
3
4
5
6
Step
1
2
3
Instruction
RS
power supply on
Function_set
0
Function_set
0
0
Display_ctl
0
0
Entry_mode_set
0
0
Write_data to CGRAM/DDRAM
1
1
Instruction
RS
power supply on
Function_set
0
Display_ctl
0
4-bit operation, 1-line display example; using external reset (character set ‘A’)
8-bit operation, 1-line display example; using external reset (character set ‘A’)
16.10 8-bit operation, 1-line display using external reset
R/W DB7 DB6 DB5 DB4
0
0
0
0
0
0
0
0
0
R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
0
16.9 4-bit operation, 1-line display using external reset
0
0
0
0
1
0
0
0
0
0
0
The program must set functions prior to a 4-bit operation (see
turned on, 8-bit operation is automatically selected and the PCF2119x attempts to
perform the first write as an 8-bit operation. Since nothing is connected to ports
DB0 to DB3, a rewrite is then required. However, since one operation is completed in two
accesses of 4-bit operation, a rewrite is required to set the functions (see
Thus, DB4 to DB7 of the Function_set are written twice.
Table 39
PCF2119x functions must be set by the Function_set instruction prior to display. Since the
DDRAM can store data for 80 characters, the RAM can be used for advertising displays
when combined with display shift operation. Since the display shift operation changes
display position only and the DDRAM contents remain unchanged, display data entered
first can be displayed when the Return_home operation is performed.
0
0
0
0
1
0
1
1
0
0
0
1
1
0
0
1
0
1
0
0
1
0
and
Table 40
0
0
0
0
0
0
0
1
0
1
0
Display
P
0
1
Rev. 05 — 13 August 2009
show an example of a 1-line display in 8-bit operation. The
0
1
0
1
Operation
initialized by the external reset; no display appears
sets to 4-bit operation; in this instance operation is handled as
8-bit by initialization and only this instruction completes with
one write
sets to 4-bit operation, selects 1-line display and V
4-bit operation starts from this point and resetting is needed
turns display and cursor on; entire display is blank after
initialization
sets mode to increment the address by 1 and to shift the cursor
to the right at the time of write to the DDRAM or CGRAM;
display is not shifted
writes ‘P’; the DDRAM has already been selected by
initialization at power-on; the cursor is incremented by 1 and
shifted to the right
0
0
Display
Operation
initialized by the external reset; no
display appears
sets to 8-bit operation, selects 1-line
display and V
turns on display and cursor; entire
display is blank after initialization
Table
LCD controllers/drivers
LCD
PCF2119x
38). When power is
= V
© NXP B.V. 2009. All rights reserved.
Table 38
0
LCD
= V
step 3).
58 of 79
0
;