saa5547ps NXP Semiconductors, saa5547ps Datasheet - Page 27
saa5547ps
Manufacturer Part Number
saa5547ps
Description
Saa550x; Saa554x Tv Microcontrollers With Closed Captioning Cc And On-screen Display Osd
Manufacturer
NXP Semiconductors
Datasheet
1.SAA5547PS.pdf
(84 pages)
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Philips Semiconductors
8.5
Features available on the OSD only devices are reflected in a specific area of the Character ROM. These sections of the
Character ROM are mapped to two Special Function Registers: TXT22 and TXT12. Character ROM address 09FEH is
mapped to SFR TXT22 as shown in Table 4. Character ROM address 09FFH is mapped to SFR TXT12 as shown in
Table 6.
Table 4 Character ROM - TXT22 mapping
U = used; X = reserved
Table 5 Description of Character ROM address 09FEH bits
Table 6 Character ROM - TXT12 mapping
U = used; X = reserved
Table 7 Description of Character ROM address 09FFH bits
2000 Feb 23
Character ROM
address 09FEH
Mapped to TXT22
Character ROM
address 09FFH
Mapped to TXT12
MAPPED ITEMS
MAPPED ITEMS
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
Character set feature bits
4 to 11
0 to 11
0 to 1
BIT
BIT
2
3
reserved; normally all set to logic 1
1 = enable CC acquisition
0 = disable CC acquisition
1 = PWM0, PWM1, PWM2 and PWM3 output routed to Port 2.1 to Port 2.4 respectively
0 = PWM0, PWM1, PWM2 and PWM3 output routed to Port 3.0 to Port 3.3 respectively
reserved; normally all set to logic 1
reserved; normally all set to logic 1
11
11
X
X
10
10
X
X
X
X
9
9
X
X
8
8
X
X
7
7
7
27
DESCRIPTION
DESCRIPTION
X
X
6
6
6
X
X
5
5
5
X
X
4
4
4
6
U
X
3
3
3
5
Preliminary specification
U
X
2
2
2
4
SAA55xx
X
X
1
1
1
3
X
X
0
0
0
2
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