PCF8833 View Datasheet(PDF) - Philips Electronics
Part Name
Description
MFG CO.
'PCF8833' PDF : 112 Pages View PDF
Philips Semiconductors
STN RGB - 132 × 132 × 3 driver
Objective speciï¬cation
PCF8833
handbook, full pagewidth
TF = 8
1 buffer row
1 unused row
BF = 8
RAM (132 x 132)
0
1
2
3
4
5
6
7
8
SEP [7:0]
121
122
123
124
125
126
127
128
129
130
131
display (132 x 130)
0
0
1
2
3
4
TF = 8
5
6
7
SEP
SA − 1 = 114
121
122
8
9
SEP − 2
124
125
126
127
128
129
130
131
131
MGU926
BF = 8
Fig.17 The non-rolling Scroll mode (TF + SA + BF = 131) for LAO = 0.
6.2.24.3 Non-rolling Scroll mode
The RAM-to-display mapping for the non-rolling Scroll
mode when a 132 × 130 (columns × rows) display is
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 × 132 display is
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).
When the non-rolling Scroll mode is used the following
sequence can be applied.
• 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.
The non-rolling Scroll mode is left when the normal Display
mode on (NORON) or the partial Display mode on
(PTLON) is selected.
2003 Feb 14
38
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