pcf8833 NXP Semiconductors, pcf8833 Datasheet - Page 15

• Manufacturer Part Number: pcf8833
• Description: Stn Rgb - 132 X 132 X 3 Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
6.2.3
The software reset (SWRESET) has exactly the same effect as the hardware reset; see Section 6.2.2.
After sending SWRESET any command can be sent immediately without any additional delay in between, for instance:
Sleep_OUT, BSTRON and DISPON, etc.
Table 5 Software reset register bits
6.2.4
The DC-to-DC converters are turned off and pins
V
In order to avoid any optical effect on the display, the
sequence given in Fig.2 must be used before the internal
display supply generation circuits are turned off.
The external LCD supply input voltages (V
V
generation (BSTROFF) is off. When BSTROFF, DISPON
and Sleep_OUT are set, the external LCD supply input
voltages (V
the display outputs will be undefined.
Table 6 Booster voltage off register bits
2003 Feb 14
LCDOUT1
LCDIN2
STN RGB - 132
D/C
D/C
0
0
) can be applied while the display voltage
S
B
and V
OFTWARE RESET
OOSTER VOLTAGE OFF
LCDIN1
LCDOUT2
7
0
7
0
and V
LCDIN2
become 3-state.
6
0
6
0
) must be applied, otherwise
132
handbook, halfpage
3 driver
5
0
5
0
Fig.2 Booster voltage off flow chart.
LCDIN1
and
send BSTROFF (02H)
send DISPOFF (28H)
4
0
4
0
start
15
end
Command Sleep_IN does not effect the setting of
BSTRON/BSTROFF or DISPON/DISPOFF, but switches
off the DC-to-DC converter (booster) and ties the display
outputs to V
For the effect of possible combinations of commands
Sleep_IN/Sleep_OUT and BSTRON/BSTROFF; see
Table 17 and Fig.4. Figure 7 shows the effects of the
combination of commands BSTRON and BSTROFF with
DISPON and DISPOFF.
MGU911
3
0
3
0
SS1
.
2
0
2
0
1
0
1
1
Objective specification
0
1
0
0
PCF8833
DEFAULT
DEFAULT
01H
02H