參數資料
型號: P83C270AAR
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC
中文描述: 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP52
文件頁數: 24/80頁
文件大?。?/td> 266K
代理商: P83C270AAR
1999 Jun 11
24
Philips Semiconductors
Product specification
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
P8xCx70 family
11.3.2
I
NTERRUPT
P
RIORITY
R
EGISTER
1 (IP1)
Table 28
Interrupt Priority Register 1 (SFR address F8H)
Table 29
Description of the IP1 bits
11.4
Interrupt Request Register 1 (IRQ1)
An interrupt request from the Closed Caption Data Slicer or from the OSD will be flagged by setting the related bit in the
Interrupt Request Register 1 to a logic 1. These bits must be reset to logic 0s by software.
Table 30
Interrupt Request Register 1 (SFR address 98H)
Table 31
Description of IRQ1 bits
7
6
5
4
3
2
1
0
PCC
PBUSY
BIT
SYMBOL
PCC
PBUSY
DESCRIPTION
7
6
5
This bit is not used, program to a logic 0 for future compatibility reasons.
CC interrupt priority level, fixed to a logic 1.
BUSY interrupt 7 priority level, fixed to a logic 1.
These 5 bits are not used, program to logic 0s for future compatibility reasons.
4 to 0
7
6
5
4
3
2
1
0
RCC
RBUSY
BIT
SYMBOL
RCC
RBUSY
DESCRIPTION
7
6
5
This bit is not used, program to a logic 0 for future compatibility reasons.
Request for CC interrupt, active HIGH.
Request for BUSY interrupt, active HIGH.
These 5 bits are not used, program to logic 0s for future compatibility reasons.
4 to 0
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