pcf8833 NXP Semiconductors, pcf8833 Datasheet - Page 38

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

Philips Semiconductors
6.2.24.3
The RAM-to-display mapping for the non-rolling Scroll
mode when a 132
connected to the PCF8833 is illustrated in Fig.18. In this
case unused rows and columns are to be left open, for
instance row 0 and 131. If a 132
connected to the PCF8833 the content of row 0 and 131
will be the same as the content which is displayed in row
1 and 130, respectively. By doing so the display data RAM
will have 2 rows in the background, whose content can be
updated when they are not displayed.
The non-rolling Scroll mode is activated when the Set
Entry Scroll Point is set; see Table Fig.37.
Figure 19 shows an example for when the PCF8833 is
working in the non-rolling Scroll mode
(TF + SA + BF = 132).
2003 Feb 14
handbook, full pagewidth
STN RGB - 132
1 unused row
1 buffer row
BF = 8
TF = 8
Non-rolling Scroll mode
130 (columns
Fig.17 The non-rolling Scroll mode (TF + SA + BF = 131) for LAO = 0.
RAM (132 x 132)
132
132 display is
rows) display is
3 driver
121
122
123
124
125
126
127
128
129
130
131
0
1
2
3
4
5
6
7
8
38
SEP [ 7:0 ]
When the non-rolling Scroll mode is used the following
sequence can be applied.
The non-rolling Scroll mode is left when the normal Display
mode on (NORON) or the partial Display mode on
(PTLON) is selected.
Fill the background memory
After the desired time interval increment the scroll
address to SEP + n for a n-line step
Keep filling the background memory and incrementing
scroll address (SEP) at regular intervals to obtain a
smooth scrolling.
display (132 x 130)
MGU926
Objective specification
SEP
SEP 2
121
122
124
125
126
127
128
129
130
131
131
0
0
1
2
3
4
5
6
7
8
9
PCF8833
TF = 8
SA
BF = 8
1 = 114