TS80C32X2 ATMEL Corporation, TS80C32X2 Datasheet - Page 18

• Manufacturer Part Number: TS80C32X2
• Description: 8-bit Microcontroller ROMless
• Manufacturer: ATMEL Corporation

TS80C31X2
6.4 Interrupt System
The TS80C31X2 has a total of 5 interrupt vectors: two external interrupts (INT0 and INT1), two timer interrupts
(timers 0 and 1) and the serial port interrupt. These interrupts are shown in Figure 7.
Each of the interrupt sources can be individually enabled or disabled by setting or clearing a bit in the Interrupt
Enable register (See Table 8.). 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 out of four priority levels by setting or clearing
a bit in the Interrupt Priority register (See Table 9.) and in the Interrupt Priority High register (See Table 10.).
shows the bit values and priority levels associated with each combination.
18
INT0
INT1
TF0
TF1
RI
TI
Individual Enable
IE0
IE1
Figure 7. Interrupt Control System
IPH, IP
3
0
3
0
3
0
3
0
3
0
Global Disable
High priority
interrupt
Interrupt
polling
sequence, decreasing
from high to low priority
Low priority
interrupt
Rev. C - 15 January, 2001