FlashFlex51 MCU
SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2
SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2
Preliminary Specifications
External Interrupt Control (XICON)
Location
7
6
5
4
3
2
1
0
Reset Value
AEH
0
EX3
IE3
IT3
0
EX2
IE2
IT2
00H
Symbol
Function
EX2
External Interrupt 2
Enable bit if set
IE2
Interrupt Enable
If IT2=1, IE2 is set/cleared automatically by hardware when interrupt is detected/
serviced.
IT2
External Interrupt 2 is falling-edge/low-level triggered when this bit is cleared by
software.
EX3
IE3
External Interrupt 3
Enable bit if set
Interrupt Enable
If IT3=1, IE3 is set/cleared automatically by hardware when interrupt is detected/
serviced.
IT3
External Interrupt3 is falling-edge/low-level triggered when this bit is cleared by
software.
©2004 Silicon Storage Technology, Inc.
S71255-00-000
3/04
34
SST [ SILICON STORAGE TECHNOLOGY, INC ]
