ATA6602-EK Atmel, ATA6602-EK Datasheet - Page 77

• Manufacturer Part Number: ATA6602-EK
• Manufacturer: Atmel

Specifications of ATA6602-EK

• Lead Free Status / Rohs Status: Supplier Unconfirmed

4.9
4921E–AUTO–09/09
Interrupts
Table 4-25.
T h i s s e c t i o n d e s c r i b e s t h e s p e c i f i c s o f t h e i n t e r r u p t h a n d l i n g a s p e r f o r m e d i n
ATA6602/ATA6603. For a general explanation of the AVR interrupt handling, refer to
Interrupt Handling” on page
The interrupt vectors in ATA6602 and ATA6603 are generally the same, with the following
differences:
• Bit 5, 2..0 - WDP3..0: Watchdog Timer Prescaler 3, 2, 1 and 0
• Each Interrupt Vector occupies two instruction words in ATA6603, and one instruction word in
• In ATA6602 and ATA6603, the Reset Vector is affected by the BOOTRST fuse, and the
WDP3
ATA6602.
Interrupt Vector start address is affected by the IVSEL bit in MCUCR.
The WDP3..0 bits determine the Watchdog Timer prescaling when the Watchdog Timer is
running. The different prescaling values and their corresponding time-out periods are shown
in
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Table
WDP2
4-25.
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Watchdog Timer Prescale Select
WDP1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
37.
WDP0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Number of WDT Oscillator
1024K (1048576) cycles
128K (131072) cycles
256K (262144) cycles
512K (524288) cycles
16K (16384) cycles
32K (32768) cycles
64K (65536) cycles
2K (2048) cycles
4K (4096) cycles
8K (8192) cycles
Cycles
ATA6602/ATA6603
Reserved
Typical Time-out at
V
CC
0.125 s
16 ms
32 ms
64 ms
0.25 s
0.5 s
1.0 s
2.0 s
4.0 s
8.0 s
= 5.0V
“Reset and
77