pcf8833 NXP Semiconductors, pcf8833 Datasheet - Page 35

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

Philips Semiconductors
6.2.24.1
The RAM-to-display mapping for the rolling Scroll mode
when a 132
to the PCF8833 is illustrated in Fig.14. In this case rows
0 and 131 must be left open. When a 132
connected, there will be a one-to-one mapping between
the RAM and the display, and there will be no unused
rows.
The rolling Scroll mode is activated when the Set Entry
Scroll Point (SEP) is set; see Table 35.
Table 35 Set entry scroll point register bits
2003 Feb 14
handbook, full pagewidth
STN RGB - 132
D/C
0
1
2 unused
rows
SA [ 7:0 ]
TF [ 7:0 ]
BF [ 7:0 ]
Rolling Scroll mode
Fig.14 RAM to display mapping for the rolling Scroll mode (TF + SA + BF = 130) for LAO = 0.
130 (columns
SEP7
7
0
RAM (132 x 132)
SEP6
D6
0
132
rows) display is connected
SEP5
3 driver
5
1
132 display is
121
122
123
124
125
126
127
128
129
130
131
0
1
2
3
4
5
6
7
8
SEP4
4
1
35
Figure 15 gives an example for when the PCF8833 is
working in the rolling Scroll mode.
When the rolling Scroll mode is used the following
sequence can be applied:
The rolling Scroll mode is left when the normal Display
mode on (NORON) or the partial Display mode on
(PTLON) is selected.
SEP3
After the desired time interval increment the scroll
address to SEP + n for a n-line step
Keep incrementing the scroll address (SEP) at regular
intervals.
3
0
display (132 x 130)
SEP2
2
1
SEP1
1
1
MGU923
Objective specification
SEP0
120
121
124
125
126
127
128
129
130
131
131
0
0
1
2
3
4
5
6
7
8
0
1
PCF8833
TF [ 7:0 ]
SA [ 7:0 ]
BF [ 7:0 ]
DEFAULT
37H
00H