Chapter 2
eSL/eSLS Series (+ eSLZ000) User’s Manual
Architecture
••••
57
2.11 External Interrupt
ELAN eSL Series support external interrupt with wake-up function. The I/O
pins are PortA-10 and 11. The external interrupts can wake-up both in GREEN
and SLEEP modes. Refer to Section 2.7.3,
CPU Control Register
for wake-up
time selection.
The External Interrupt Attributes and Resources:
Item
Resource
Usage register
EICON
Interrupt sources
EXINTIF0, EXINTIF1
I/O function pin
EXINT0, EXINT1
Operation mode
Rising edge, Falling edge, Low level, Both edge
Wakeup
2.11.1 External Interrupt Control Register
The External Interrupt Control Register Attributes and Definitions:
EICON
Bit
DIR.
Description
Reset
Value
[1:0]
R/W
00
= Rising edge triggered
01
= Falling edge triggered
10
= Low level interrupt
11
= Both edge triggered
00
EXINT0
[2]
R/W
EXINT0 Wake-up Enable Control
*
0
= Wake-up Disable
1
= Wake-up Enable
0
[4:3]
R/W
00
= Rising edge triggered
01
= Falling edge triggered
10
= Low level interrupt
11
= Both edge triggered
00
EXINT1
[5]
R/W
EXINT1 Wake-up Enable Control
*
0
= Wake-up Disable
1
= Wake-up Enable
0
NOTE
*
When eSL is in the sleep mode and EXINT wake-up is enable, both rising and falling
edge will make eSL iC wake-up.
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