saa569x NXP Semiconductors, saa569x Datasheet - Page 69

• Manufacturer Part Number: saa569x
• Description: Enhanced Tv Microcontrollers With On-screen Display Osd
• Manufacturer: NXP Semiconductors

Philips Semiconductors
23.3
The display section has two distinct modes with different
features available in each:
In both of the above modes, the character matrix and
TV lines per row can be defined. There is an option of a
character matrix (H
12
row, respectively.
Table 27 gives the possible number of display rows for
each combination, as allowed by the hardware.
2002 May 06
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TXT: This is the WST mode with additional serial and
global attributes. A TXT window is configured as a fixed
25 rows with 40 characters per row.
CC: This is the US Closed Caption mode. A CC window
is configured as a maximum of 16 rows with a maximum
of 48 characters per row.
Enhanced TV microcontrollers with
On-Screen Display (OSD)
16, which have 9, 10, 13 and 16 TV lines per display
Display modes
Vsync
DISP FIELD
Vsync
DISP FIELD
V) of 12
Fig.28 2H/1V: basic Progressive Scan (hardware forces a notional field).
9, 12
Fig.29 2H/1V: Progressive Scan with interlace.
(A and B) Field
10, 12
13, or
69
Table 27 Maximum number of display rows
SFR TXT21 and memory mapped registers are used to
control the mode selection. The features will now be
described and their function in each of the modes given.
If the feature is different in either mode then this is stated.
CHARACTER
MATRIX
12
12
12
12
10
13
16
9
(A and B) Field
MAX NUMBER OF DISPLAY ROWS
TXT 625
25
25
21
17
SAA567x; SAA569x
Objective specification
MGW085
MGW086
TXT 525
25
23
18
14
CC
16
16
16
14