SST89V54RD2 Silicon Storage Technology, Inc., SST89V54RD2 Datasheet - Page 58

• Manufacturer Part Number: SST89V54RD2
• Description: Flashflex51 Mcu
• Manufacturer: Silicon Storage Technology, Inc.

Data Sheet
11.0 INTERRUPTS
11.1 Interrupt Priority and Polling Sequence
The device supports eight interrupt sources under a four level priority scheme. Table 11-1 summarizes the polling
sequence of the supported interrupts. Note that the SPI serial interface and the UART share the same interrupt
vector. (See Figure 11-1)
TABLE 11-1: Interrupt Polling Sequence
©2007 Silicon Storage Technology, Inc.
Description
Ext. Int0
Brown-out
T0
Ext. Int1
T1
PCA
Ext. Int. 2
Ext. Int. 3
UART/SPI
T2
Interrupt Flag
TF2, EXF2
TI/RI/SPIF
CF/CCFn
TF0
TF1
IE0
IE1
IE2
IE3
-
Address
Vector
004BH
000BH
001BH
003BH
002BH
0003H
0013H
0033H
0043H
0023H
Interrupt
Enable
EBO
EX0
ET0
EX1
ET1
EX2
EX3
ET2
EC
ES
58
SST89V54RD2/RD / SST89V58RD2/RD
Interrupt
Priority
PBO/H
PX0/H
PX1/H
PX2/H
PX3/H
PT0/H
PT1/H
PPCH
PT2/H
PS/H
1(highest)
Service
Priority
10
2
4
6
7
8
9
3
5
FlashFlex MCU
S71255-10-000
Power-down
Wake-Up
yes
yes
no
no
no
no
no
no
no
no
T11-1.0 1255
12/07