參數(shù)資料
型號: SAF-C513A-HN
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, EEPROM, 8 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 122/128頁
文件大?。?/td> 1837K
代理商: SAF-C513A-HN
Semiconductor Group
7-6
Interrupt System
If two interrupt requests of different priority level are received simultaneously, the request of higher
priority is serviced. If requests of the same priority are received simultaneously, an internal polling
sequence determines which request is serviced. Thus within each priority level there is a second
priority structure determined by the polling sequence as shown in table 7-1.
A low-priority interrupt in service can itself be interrupted by a high-priority interrupt, but not by
another low-priority interrupt. A high-priority interrupt in service cannot be interrupted by any other
interrupt source.
The interrupt request flags are located in bit-addressable SFR’s as listed in table 7-2.
Table 7-1
Priority-within-Level Structure
Interrupt Source
Priority
External Interrupt 0,
IE0
Synchronous Serial Channel SSC
Timer 0 Interrupt,
TF0
External Interrupt 1,
IE1
Timer 1 Interrupt,
TF1
Universal Serial Channel,
RI or TI
Timer 2 Interrupt,
TF2 or EXF2
High
Low
Table 7-2
Location of Interrupt Sources Request Flags
Interrupt Request Flag
SFR
Address
Bit-Addr.
External Interrupt 0,
IE0
Timer 0 Interrupt,
TF0
External Interrupt 1,
IE1
Timer 1 Interrupt,
TF1
Universal Serial Channel,
RI (C513/C513A/
C513A-H only)
Universal Serial Channel,
TI (C513/C513A/
C513A-H only)
Timer 2 Interrupt,
TF2
Timer 2 Interrupt,
EXF2
Synchr. Serial Channel
TC
Synchr. Serial Channel
WCOL
TCON
SCON
T2CON
SCF
88H
98H
C8H
F8H
89H
8DH
8BH
8FH
98H
99H
CFH
CEH
F8H
F9H
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