FlashFlex51 MCU
SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2
SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2
Preliminary Specifications
Interrupt Priority (IP)
Location
7
6
5
4
3
2
1
0
Reset Value
B8H
-
PPC
PT2
PS
PT1
PX1
PT0
PX0
x0000000b
Symbol
PPC
PT2
Function
PCA interrupt priority bit
Timer 2 interrupt priority bit
Serial Port interrupt priority bit
Timer 1 interrupt priority bit
External interrupt 1 priority bit
Timer 0 interrupt priority bit
External interrupt 0 priority bit
PS
PT1
PX1
PT0
PX0
Interrupt Priority High (IPH)
Location
7
6
5
4
3
2
1
0
Reset Value
B7H
-
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
x0000000b
Symbol
PPCH
PT2H
PSH
Function
PCA interrupt priority bit high
Timer 2 interrupt priority bit high
Serial Port interrupt priority bit high
Timer 1 interrupt priority bit high
External interrupt 1 priority bit high
Timer 0 interrupt priority bit high
External interrupt 0 priority bit high
PT1H
PX1H
PT0H
PX0H
Interrupt Priority 1 (IP1)
Location
7
6
5
4
3
2
1
0
Reset Value
F8H
1
-
-
1
PBO
PX3
PX2
1
1xx10001b
Symbol
PBO
Function
Brown-out interrupt priority bit
External Interrupt 2 priority bit
External Interrupt 3 priority bit
PX2
PX3
Interrupt Priority 1 High (IP1H)
Location
7
6
5
4
3
2
1
0
Reset Value
F7H
1
-
-
1
PBOH
PX3H
PX2H
1
1xx10001b
Symbol
PBOH
PX2H
Function
Brown-out Interrupt priority bit high
External Interrupt 2 priority bit high
External Interrupt 3 priority bit high
PX3H
©2004 Silicon Storage Technology, Inc.
S71255-00-000
3/04
25
SST [ SILICON STORAGE TECHNOLOGY, INC ]
