p87c770aar NXP Semiconductors, p87c770aar Datasheet - Page 22

• Manufacturer Part Number: p87c770aar
• Description: Microcontrollers Ntsc With On-screen Display Closed Caption
• Manufacturer: NXP Semiconductors

Philips Semiconductors
11.2
Each interrupt source can be individually enabled or disabled by setting or clearing its associated bit in the Interrupt
Enable Registers (IEN0 and IEN1). All interrupt sources can also be globally disabled by clearing the EA bit in SFR IEN0.
The Interrupt Enable Registers are described in Sections 11.2.1 and 11.2.2.
11.2.1
Table 21 Interrupt Enable Register 0 (SFR address A8H)
Table 22 Description of the IEN0 bits
11.2.2
Table 23 Interrupt Enable Register 1 (SFR address E8H)
Table 24 Description of the IEN1 bits
1999 Jun 11
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
4 to 0
BIT
BIT
EA
7
7
6
5
4
3
2
1
0
7
7
6
5
Interrupt enable structure
I
I
NTERRUPT
NTERRUPT
SYMBOL
SYMBOL
EBUSY
ECC
ECC
E
ES1
ET1
EX1
ET0
EX0
E
EA
NABLE
6
NABLE REGISTER
6
R
EGISTER
General enable/disable control. When EA = 0, no interrupt is enabled. When EA = 1,
any individually enabled interrupt will be accepted.
This bit is not used; program to a logic 0 for future compatibility reasons.
Enable I
This bit is not used; program to a logic 0 for future compatibility reasons.
Enable Timer 1 interrupt.
Enable external interrupt 1.
Enable Timer 0 interrupt.
Enable external interrupt 0.
This bit is not used; program to a logic 0 for future compatibility reasons.
Enable external interrupt 8 (CC data ready).
Enable external interrupt 7 (BUSY interrupt).
These 5 bits are not used; program to logic 0s for future compatibility reasons.
EBUSY
ES1
5
5
1 (IEN1)
0 (IEN0)
2
C-bus SIO interrupt.
4
4
22
ET1
3
3
DESCRIPTION
DESCRIPTION
EX1
2
2
P8xCx70 family
ET0
1
1
Product specification
EX0
0
0