ata6616 ATMEL Corporation, ata6616 Datasheet - Page 86

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

4.9.2
Figure 4-23. Timing of Pin Change Interrupts
4.9.3
4.9.3.1
86
ATA6616/ATA6617 [Preliminary]
Pin Change Interrupt Timing
PCINT[i]
External Interrupts Register Description
pin
External Interrupt Control Register A – EICRA
clk
pcint_set/flag
PCINT[i] pin
pcint_in[i]
pcint_syn
pin_sync
pin_lat
D
LE
PCIF
Q
clk
n
An example of timing of a pin change interrupt is shown in
The External Interrupt Control Register A contains control bits for interrupt sense control.
• Bit 7..4 – Res: Reserved Bits
These bits are unused bits in the ATtiny167, and will always read as zero.
• Bit 3, 2 – ISC11, ISC10: Interrupt Sense Control 1 Bit 1 and Bit 0
The External Interrupt 1 is activated by the external pin INT1 if the SREG I-flag and the corre-
sponding interrupt mask are set. The level and edges on the external INT1 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.
pin_lat
Initial Value
Read/Write
D
Bit
Q
pin_sync
R
7
–
0
(of PCMSK
PCINT[i] bit
Table
n
R
6
–
0
)
pcint_in[i]
4-20. The value on the INT1 pin is sampled before detecting
R
5
–
0
0
7
clk
R
4
–
0
DRAFT
D
ISC11
R/W
Q
3
0
pcint_sync
Figure
D
ISC10
R/W
2
0
Q
pcint_set/flag
4-23.
ISC01
D
R/W
1
0
Q
(interrupt flag)
PCIF
ISC00
R/W
n
0
0
9132A–AUTO–10/08
EICRA