pcf8814 NXP Semiconductors, pcf8814 Datasheet - Page 31

• Manufacturer Part Number: pcf8814
• Description: Pcf8814 65 X 96 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
11.7
L[5:0] is used to select the display line address of the
display RAM to be displayed on the initial row (R0). L[5:0]
must not be set higher than the current multiplex system,
i.e. if P[2:0] = 010 (MUX 1 : 48), then L[5:0] must be in the
range 0 to 47.
The initial row is set by C[2:0] and can only be defined in
steps of 8. C[2:0] should not be set such that it causes the
visible display area to be wrapped from the bottom of the
screen to the top, i.e.
Figure 31 shows the mapping from the RAM content to the
display. The content of the RAM is not modified. This
allows for screen scrolling, without the need to rewrite the
RAM. Figure 32 shows some example screen shots.
2003 Mar 13
handbook, full pagewidth
65
Set display start line
96 pixels matrix LCD driver
Row 24
C[2:0] 8
Fig.30 Valid values for ‘p’ (MUX mode) and C (initial row selection).
MUX 32 and C = Row 24
32
VALID MODE
+
MUX rate 65.
24
32
65 valid
31
Table 18 Initial row selection
MBL588
C2
Row 48
0
0
0
0
1
1
1
1
MUX 32 and C = Row 48
32
INVALID MODE
C1
0
0
1
1
0
0
1
1
48
65 not valid
C0
0
1
0
1
0
1
0
1
Objective specification
PCF8814
Row 16
Row 24
Row 32
Row 40
Row 48
Row 56
Row 0
Row 8
ROW