ata6616 ATMEL Corporation, ata6616 Datasheet - Page 87

• Manufacturer Part Number: ata6616
• Description: Microcontroller With Lin Transceiver, 5v Regulator And Watchdog
• Manufacturer: ATMEL Corporation

4.9.3.2
9132A–AUTO–10/08
DRAFT
External Interrupt Mask Register – EIMSK
• Bit 1, 0 – ISC01, ISC00: Interrupt Sense Control 0 Bit 1 and Bit 0
The External Interrupt 0 is activated by the external pin INT0 if the SREG I-flag and the corre-
sponding interrupt mask are set. The level and edges on the external INT0 pin that activate the
interrupt are defined in
edges. If edge or toggle interrupt is selected, pulses that last longer than one clock period will
generate an interrupt. Shorter pulses are not guaranteed to generate an interrupt. If low level
interrupt is selected, the low level must be held until the completion of the currently executing
instruction to generate an interrupt.
Table 4-20.
• Bit 7, 2 – Res: Reserved Bits
These bits are unused bits in the ATtiny167, and will always read as zero.
• Bit 1 – INT1: External Interrupt Request 1 Enable
When the INT1 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), the exter-
nal pin interrupt is enabled. The Interrupt Sense Control1 bits 1/0 (ISC11 and ISC10) in the
External Interrupt Control Register A (EICRA) define whether the external interrupt is activated
on rising and/or falling edge of the INT1 pin or level sensed. Activity on the pin will cause an
interrupt request even if INT1 is configured as an output. The corresponding interrupt of External
Interrupt Request 1 is executed from the INT1 Interrupt Vector.
• Bit 0 – INT0: External Interrupt Request 0 Enable
When the INT0 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), the exter-
nal pin interrupt is enabled. The Interrupt Sense Control0 bits 1/0 (ISC01 and ISC00) in the
External Interrupt Control Register A (EICRA) define whether the external interrupt is activated
on rising and/or falling edge of the INT0 pin or level sensed. Activity on the pin will cause an
interrupt request even if INT0 is configured as an output. The corresponding interrupt of External
Interrupt Request 0 is executed from the INT0 Interrupt Vector.
Read/Write
Initial Value
ISCn1
0
0
1
1
Bit
Interrupt Sense Control
ISCn0
R
7
–
0
0
1
0
1
Table
Description
The low level of INTn generates an interrupt request.
Any logical change on INTn generates an interrupt request.
The falling edge of INTn generates an interrupt request.
The rising edge of INTn generates an interrupt request.
R
6
–
0
4-20. The value on the INT0 pin is sampled before detecting
ATA6616/ATA6617 [Preliminary]
R
5
–
0
R
4
–
0
R
3
–
0
R
2
–
0
INT1
R/W
1
0
INT0
R/W
0
0
EIMSK
87