PCF8820U Philips Semiconductors, PCF8820U Datasheet - Page 21

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

Philips Semiconductors
8.1
Table 3 Instruction set bit functions
2000 Dec 07
D
TR
H
DO
PD
V
Y
X
D, E
MX
MY
4
6
7
2
67 101 Grey-scale/ECB colour dot matrix
LCD driver
7
to Y
to X
to D
to H
to TR
BIT
Description of the bit functions
0
0
0
0
0
RESET
STATE
000
00
0
1
0
0
0
0
0
VALUE
000
001
010
011
100
00
01
10
11
0
1
0
1
0
1
0
1
0
1
data to be written to DDRAM
read-out value of sensor temperature
command page numbers
data order when written to DDRAM
operation mode
address mode
Y-address of the DDRAM points to the rows; the address range is from
0 to 16 (10H); see Section 8.1.3
X-address of the DDRAM points to the columns; the address range is from
0 to 100 (64H)
display mode
horizontal address space mirroring; see Figs 7 and 8; see Table 10
vertical address space mirroring; see Table 10
function and RAM
display setting
high voltage generator setting
grey-scale/colour
special features
normal (see Fig.6)
swapped: DB7 <-> DB0, DB6 <-> DB1, etc.
operating mode
Power-down mode; see Section 8.1.1
horizontal address mode: data is written to DDRAM (see Fig.10)
vertical address mode: data is written to DDRAM (see Fig.9)
display blank: using the value in grey-scale register 0
all display segments on: using the value in grey-scale register 3
normal mode: using the values of the four grey-scale registers appropriate to the
RAM data
inverse video: using the values in all four grey-scale registers as in normal mode
but with their values swapped (GS
values transposed)
disabled: data to DDRAM is written from left (X = 0) to right (X = 100)
enabled: data to DDRAM is written from right (X = 0) to left (X = 100)
disabled: normal display
enabled: data is immediately mirrored vertically on the LCD. The status of bit MY
takes effect when data is read from the DDRAM and when generating column
signals.
21
FUNCTION
0
and GS
3
values transposed, GS
Product specification
PCF8820
1
and GS
2