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T84C5112-RKREV Fiches technique(PDF) 65 Page - ATMEL Corporation

No de pièce T84C5112-RKREV
Description  8-bit Microcontroller with A/D converter
PDF  97 Pages
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Fabricant  ATMEL [ATMEL Corporation]
Site Internet  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T84C5112-RKREV Fiches technique(HTML) 65 Page - ATMEL Corporation

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Rev. B - November 10, 2000
65
Preliminary
T80C5112
15. Interrupt System
The T80C5112 has a total of 8 interrupt vectors: two external interrupts (INT0 and INT1), two timer interrupts
(timers 0, 1), serial port interrupt, PCA, SPI and A/D. These interrupts are shown in Figure 32..
Figure 32. Interrupt Control System
Each of the interrupt sources can be individually enabled or disabled by setting or clearing a bit in the Interrupt
Enable register (See Table 42.). This register also contains a global disable bit, which must be cleared to disable
all interrupts at once.
Each interrupt source can also be individually programmed to one of four priority levels by setting or clearing a
bit in the Interrupt Priority register (See Table 44.) and in the Interrupt Priority High register (See Table 46.).
Table 40. shows the bit values and priority levels associated with each combination.
IE1
0
3
High priority
interrupt
Interrupt
polling
sequence
Low priority
interrupt
Global
disable
Individual
enable
TI
RI
TF0
INT0
INT1
TF1
IPH, IP
IE0
0
3
0
3
0
3
0
3
0
3
NC
SPI
0
3
ADC
0
3
0
3
CF
CCFx
PCA



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