SDA55XX Datasheet, PDF (178/230 Pages) Infineon Technologies AG – Preliminary & Confidential

SDA 55xx
Preliminary & Confidential
Display
18.3.2 Flash
Bit FLASH inside character display word (CDW; see also 18.3) is used to
enable flash for a character:
FLASH
0
1
Description
steady (flash disabled)
flash
see also 18.3 / Character Display Word (CDW)
The meaning of the flash attribute is different for ROM characters and 1-bit
DRCS characters in comparison to the meaning of flash for 2-bit and 4-bit
DRCS characters.
For flash rate control see also the global attribute "FLRATE1..FLRATE0" in
chapter 18.4.5.
18.3.2.1 Flash for ROM Characters and 1-bit DRCS Characters
For ROM characters and 1-bit DRCS characters enabled flash causes the
foreground pixels to alternate between the foreground and background color
vector.
18.3.2.2 Flash for 2-bit and 4-bit DRCS Characters
For these characters enabled flash causes the DRCS pixels to alternate
between the 2-bit/ 4-bit color vector and the background color vector which is
defined by the parameters BG2..BG0 inside character display word (CDW; see
also 18.3).
18.3.3 Character Individual Double Height
Bit UH (Upper half, double height) marks the upper part of a double height
character. It is only active, if the DH bit (Double Height) is set to ’1’.
Semiconductor Group
178
User’s Manual July 99