參數(shù)資料
型號(hào): SAA5541PS
廠商: NXP Semiconductors N.V.
英文描述: TV Microcontrollers with Closed Captioning (CC) and On-Screen Display (OSD)(帶關(guān)閉字幕和全屏顯示的TV控制器)
中文描述: 電視微控制器與隱藏字幕(CC)和屏幕顯示(OSD)(帶關(guān)閉字幕和全屏顯示的電視控制器)
文件頁(yè)數(shù): 27/84頁(yè)
文件大?。?/td> 318K
代理商: SAA5541PS
2000 Feb 23
27
Philips Semiconductors
Preliminary specification
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
SAA55xx
8.5
Character set feature bits
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
U = used; X = reserved
Character ROM - TXT22 mapping
Table 5
Description of Character ROM address 09FEH bits
Table 6
U = used; X = reserved
Character ROM - TXT12 mapping
Table 7
Description of Character ROM address 09FFH bits
MAPPED ITEMS
Character ROM
address 09FEH
Mapped to TXT22
11
X
10
X
9
X
8
X
7
X
6
X
5
X
4
X
3
U
2
U
1
X
0
X
7
6
5
4
3
2
1
0
BIT
0 to 1
2
DESCRIPTION
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
3
4 to 11
MAPPED ITEMS
Character ROM
address 09FFH
Mapped to TXT12
11
X
10
X
9
X
8
X
7
X
6
X
5
X
4
X
3
X
2
X
1
X
0
X
6
5
4
3
2
BIT
0 to 11
DESCRIPTION
reserved; normally all set to logic 1
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