Datasheet

136
A/T89C51CC01
4129N–CAN–03/08
Interrupt System
Introduction The CAN Controller has a total of 10 interrupt vectors: two external interrupts (INT0 and
INT1), three timer interrupts (timers 0, 1 and 2), a serial port interrupt, a PCA, a CAN
interrupt, a timer overrun interrupt and an ADC. These interrupts are shown below.
Figure 63. Interrupt Control System
ECAN
IEN1.0
EX0
IEN0.0
00
01
10
11
External
Interrupt 0
INT0#
EA
IEN0.7
EX1
IEN0.2
External
Interrupt 1
INT1#
ET0
IEN0.1
Timer 0
EC
IEN0.6
PCA
ET1
IEN0.3
Timer 1
ES
IEN0.4
UART
EADC
IEN1.1
A to D
Converter
ETIM
IEN1.2
CAN Timer
CAN
Interrupt Enable Lowest Priority Interrupts
Highest
Priority Enable
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
Priority
Interrupts
TxDC
RxDC
AIN1:0
IPH/L
controller
Timer 2
00
01
10
11
ET2
IEN0.5
TxD
RxD
CEX0:5