
2001 Nov 14
14
Philips Semiconductors
Product specification
65
×
102 pixels matrix LCD driver
OM6206
TC
1
and TC
0
00
01
10
11
00
01
10
11
V
LCD
temperature coefficient 0
V
LCD
temperature coefficient 1
V
LCD
temperature coefficient 2
V
LCD
temperature coefficient 3
2
×
voltage multiplier
3
×
voltage multiplier
4
×
voltage multiplier
5
×
voltage multiplier
bias system
V
LCD
programming
00
S
1
and S
0
00
BS
2
to BS
0
V
OP6
to V
OP0
000
0000000
BIT
BIT VALUE
DESCRIPTION
RESET STATE
8.1
Initialization
Immediately following power-on, all internal registers as
well as the RAM content are undefined. A RES pulse must
be applied.
Reset is accomplished by applying an external reset pulse
(active LOW) at pin RES. When reset occurs within the
specified time, all internal registers are reset however the
RAM is still undefined. The state after reset is described in
Section 8.2.
RES input must be
≤
0.3V
DD
when V
DD
reaches V
DD(min)
(or higher) within a maximal time t
VHRL
after V
DD
going
HIGH (see Fig.16).
8.2
Reset function
After reset the LCD driver has the following state:
Power-down mode (PD = 1)
Horizontal addressing (V = 0)
Normal instruction set (H = 0)
Display blank (E and D = 0)
Address counter X
6
to X
0
= 0, Y
3
to Y
0
= 0
Temperature control (TC
1
and TC
0
= 0)
Bias system (BS
2
to BS
0
= 0)
V
LCD
is equal to 0 V and the high-voltage generator is
switched off (V
OP6
to V
OP0
= 0 and PRS = 0)
After power-on, RAM data are undefined, the reset
signal does not change the content of the RAM
All LCD outputs at V
SS
(display off).
8.3
Function set
8.3.1
PD
When PD = 1 the chip is in Power-down mode:
All LCD outputs at V
SS
(display off)
Bias generator and V
LCD
generator off; V
LCD
can be
disconnected
Oscillator off (external clock possible)
Serial bus: command, function etc.
RAM contents not cleared; RAM data can be written
V
LCD
discharged to V
SS
in Power-down mode.
8.3.2
V
When V = 0, the horizontal addressing is selected. The
data is written into the DDRAM as shown in Fig.6.
When V = 1, the vertical addressing is selected. The data
is written into the DDRAM as shown in Fig.5.
8.3.3
H
When 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 H = 1 the others can be executed. The
commands ‘write data’ and ‘function set’ can be executed
in both cases.
8.4
Display control
8.4.1
D
AND
E
The bits D and E select the display mode (see Table 2).