Figure 10-1. Interrupt Control System
Highest
Priority
00
01
10
11
External
Interrupt 0
Interrupts
INT0
EX0
IEN0.0
00
01
10
11
Timer 0
ET0
IEN0.1
00
01
10
11
External
Interrupt 1
INT1
EX1
IEN0.2
00
01
10
11
Timer 1
ET1
IEN0.3
00
01
10
11
TXD
Serial
Port
RXD
ES
IEN0.4
00
01
10
11
Audio
Interface
EAUD
IEN0.6
00
01
10
11
MCLK
MDAT
MMC
Controller
MCMD
EMMC
IEN1.0
00
01
10
11
SCL
Two-wire
Controller
SDA
EI2C
IEN1.1
00
01
10
11
SCK
SI
SPI
Controller
SO
ESPI
IEN1.2
00
01
10
11
A to D
Converter
AIN1:0
EADC
IEN1.3
00
01
10
11
KIN3:0
Keyboard
EKB
IEN1.4
00
01
10
11
D+
D-
USB
Controller
EUSB
IEN1.6
EA
IEN0.7
IPH/L
Interrupt Enable
Priority Enable
Lowest Priority Interrupts
36
AT89C5132
4173E–USB–09/07
ATMEL [ ATMEL ]
