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| 型号： | P87C770AAR |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Microcontrollers for NTSC TVs with On-Screen Display OSD and Closed Caption CC |
| 中文描述： | 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP52 |
| 文件页数： | 24/80页 |
| 文件大小： | 266K |
| 代理商： | P87C770AAR |
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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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