pcf8812 NXP Semiconductors, pcf8812 Datasheet - Page 15

• Manufacturer Part Number: pcf8812
• Description: 65 X 102 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
10.3
10.3.1
When bit PD = 0:
10.3.2
When bit V = 0, the horizontal addressing is selected. The
data is written into the DDRAM as shown in Fig.5. When
bit V = 1, the vertical addressing is selected. The data is
written into the DDRAM as shown in Fig.6.
Table 3 X or Y address range (note 1)
Note
1. In bank 8 only the LSB is accessed.
10.6
The X address points to the columns. The range of X is 0 to 101 (65H).
10.7
The PCF8812 incorporates a software configurable voltage multiplier. After reset (RES) the voltage multiplier is set to
2
2004 Feb 23
All LCD outputs at V
Bias generator and V
disconnected
Oscillator off (external clock possible)
Serial bus; command; etc. function
RAM contents not cleared; RAM data can be written
V
65
Y3
0
0
0
0
0
0
0
0
1
LCD
V
DD2
Function set
Set X address of RAM
Set HV-generator stages
discharged to V
. Other voltage multiplier factors are set via the command ‘Set voltage multiplier factor’ (see Tables 1 and 2).
B
B
102 pixels matrix LCD driver
IT
IT
Y2
0
0
0
0
1
1
1
1
0
PD
V
Y1
0
0
1
1
0
0
1
1
0
SS
LCD
SS
(display off)
in Power-down mode.
generator off; V
Y0
0
1
0
1
0
1
0
1
0
bank 0 (display RAM)
bank 1 (display RAM)
bank 2 (display RAM)
bank 3 (display RAM)
bank 4 (display RAM)
bank 5 (display RAM)
bank 6 (display RAM)
bank 7 (display RAM)
bank 8 (display RAM)
LCD
can be
CONTENT
15
10.3.3
When bit H = 0 the commands ‘display control’, ‘set
Y address’, ‘set X address’ and set the PRS bit (low or high
range of the high voltage generator) can be performed,
when bit H = 1 the other commands can be executed. The
commands ‘write data’ and ‘function set’ can be executed
when bit H = 0 or 1.
10.4
10.4.1
The bits D and E select the display mode (see Table 2).
10.5
Bits Y[3:0] define the Y address vector address of the
display RAM (see Table 3).
Display control
Set Y address of RAM
B
B
IT
ITS
H
D
0 to 101
0 to 101
0 to 101
0 to 101
0 to 101
0 to 101
0 to 101
0 to 101
0 to 101
AND
E
ALLOWED X RANGE
Product specification
PCF8812