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AT89C5131A-RDTIL Datasheet(PDF) 76 Page - ATMEL Corporation

Part # AT89C5131A-RDTIL
Description  8-bit Flash Microcontroller with Full Speed USB Device
PDF  185 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5131A-RDTIL Datasheet(HTML) 76 Page - ATMEL Corporation

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AT89C5131A-L
4338E–USB–06/06
Interrupt System
Overview
The AT89C5131A-L has a total of 11 interrupt vectors: two external interrupts (INT0 and
INT1), three timer interrupts (timers 0, 1 and 2), the serial port interrupt, SPI interrupt,
Keyboard interrupt, USB interrupt and the PCA global interrupt. These interrupts are
shown in Figure 38.
Figure 38. Interrupt Control System
IE1
0
3
High priority
interrupt
Interrupt
Polling
Sequence, Decreasing From
High-to-Low Priority
Low Priority
Interrupt
Global Disable
Individual Enable
EXF2
TF2
TI
RI
TF0
INT0
INT1
TF1
IPH, IPL
IE0
0
3
0
3
0
3
0
3
0
3
0
3
PCA IT
KBD IT
SPI IT
0
3
0
3
0
3
UEPINT
USBINT
0
3
TWI IT
1
1
0
0
IT0
TCON.0
IT1
TCON.2



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