PCF8820U Philips Semiconductors, PCF8820U Datasheet - Page 37

• Manufacturer Part Number: PCF8820U
• Description: 67 x 101 Grey-scale/ECB colour dot matrix LCD driver
• Manufacturer: Philips Semiconductors

Philips Semiconductors
13 APPLICATION INFORMATION
13.1
It should be noted that only a part of the LCD is shown in the LCD column of Table 9.
Table 9 Programming example
2000 Dec 07
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
STEP
67 101 Grey-scale/ECB colour dot matrix
LCD driver
Programming example for the PCF8820
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
SERIAL BUS BYTE
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
SA1 SA0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
1
0
37
LCD
start slave address, R/W = 0
control byte: Co = 1, RS = 0
H
select function and RAM command
page (H
control byte: Co = 1, RS = 0
function and RAM command page:
select display setting command
page (H
control byte: Co = 1, RS = 0
display setting command page: set
normal display mode (D = 1, E = 0)
control byte: Co = 1, RS = 0
display setting command page: set
bias system =
(BS
control byte: Co = 1, RS = 0
display setting command page:
select first 8 rows for partial screen
mode (DP
control byte: Co = 1, RS = 0
H
select function and RAM command
page (H
control byte: Co = 1, RS = 0
function and RAM command page:
select Power-down mode (PD = 1)
and vertical address mode (V = 1)
control byte: Co = 1, RS = 0
function and RAM command page:
select special feature command
page (H
control byte: Co = 1, RS = 0
special feature command page:
enable display (DOF = 0) and
enable direct drive (DM = 1) to
pre-charge the charge pump
control byte: Co = 1, RS = 0
2
2
to H
to H
2
to BS
0
0
2
2
2
2
independent command:
independent command:
to H
to H
to H
to H
2
0
OPERATION
to DP
= 010)
0
0
0
0
1
= 000)
= 001)
= 000)
= 100)
/
Product specification
9
0
= 000)
PCF8820