24
Data Sheet
FlashFlex51 MCU
SST89E52RD2/RD / SST89E54RD2/RD / SST89E58RD2/RD
SST89V52RD2/RD / SST89V54RD2/RD / SST89V58RD2/RD
©2006 Silicon Storage Technology, Inc. S71255-05-000 5/06
Symbol Function
PPC PCA interrupt priority bit
PT2 Timer 2 interrupt priority bit
PS Serial Port interrupt priority bit
PT1 Timer 1 interrupt priority bit
PX1 External interrupt 1 priority bit
PT0 Timer 0 interrupt priority bit
PX0 External interrupt 0 priority bit
Symbol Function
PPCH PCA interrupt priority bit high
PT2H Timer 2 interrupt priority bit high
PSH Serial Port interrupt priority bit high
PT1H Timer 1 interrupt priority bit high
PX1H External interrupt 1 priority bit high
PT0H Timer 0 interrupt priority bit high
PX0H External interrupt 0 priority bit high
Symbol Function
PBO Brown-out interrupt priority bit
PX2 External Interrupt 2 priority bit
PX3 External Interrupt 3 priority bit
Symbol Function
PBOH Brown-out Interrupt priority bit high
PX2H External Interrupt 2 priority bit high
PX3H External Interrupt 3 priority bit high
Interrupt Priority (IP)
Location76543210Reset Value
B8H - PPC PT2 PS PT1 PX1 PT0 PX0 x0000000b
Interrupt Priority High (IPH)
Location76543210Reset Value
B7H - PPCH PT2H PSH PT1H PX1H PT0H PX0H x0000000b
Interrupt Priority 1 (IP1)
Location76543210Reset Value
F8H 1 - - 1 PBO PX3 PX2 1 1xx10001b
Interrupt Priority 1 High (IP1H)
Location76543210Reset Value
F7H 1 - - 1 PBOH PX3H PX2H 1 1xx10001b
