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参数资料
型号： ST72F324K2B6
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
封装： 0.400 INCH, PLASTIC, SDIP-32
文件页数： 86/156页
文件大小： 1027K
代理商： ST72F324K2B6
ST72324J/K
35/156
INTERRUPTS (Cont’d)
Table 8. Interrupt Mapping
Notes:
1. Valid for HALT and ACTIVE-HALT modes except for the MCC/RTC or CSS interrupt source which exits
from ACTIVE-HALT mode only.
7.6 EXTERNAL INTERRUPTS
7.6.1 I/O Port Interrupt Sensitivity
The external interrupt sensitivity is controlled by
the IPA, IPB and ISxx bits of the EICR register
(Figure 22). This control allows to have up to 4 fully
independent external interrupt source sensitivities.
Each external interrupt source can be generated
on four (or five) different events on the pin:
s
Falling edge
s
Rising edge
s
Falling and rising edge
s
Falling edge and low level
s
Rising edge and high level (only for ei0 and ei2)
To guarantee correct functionality, the sensitivity
bits in the EICR register can be modified only
when the I1 and I0 bits of the CC register are both
set to 1 (level 3). This means that interrupts must
be disabled before changing sensitivity.
The pending interrupts are cleared by writing a dif-
ferent value in the ISx[1:0], IPA or IPB bits of the
EICR.
N
°
Source
Block
Description
Register
Label
Priority
Order
Exit
from
HALT1)
Address
Vector
RESET
Reset
N/A
yes
FFFE h-FFFFh
TRAP
Software interrupt
no
FFFCh-FFFDh
0
Not used
FFFA h-FFFBh
1
MCC/RTC
CSS
Main clock controller time base interrupt
Safe oscillator activation interrupt
MCCSR
SICSR
Higher
Priority
yes
FFF8h-FFF9h
2
ei0
External interrupt port A3..0
N/A
yes
FFF6h-FFF7h
3
ei1
External interrupt port F2..0
yes
FFF4h-FFF5h
4
ei2
External interrupt port B3..0
yes
FFF2h-FFF3h
5
ei3
External interrupt port B7..4
yes
FFF0h-FFF1h
7
SPI
SPI peripheral interrupts
SPICSR
yes
FFECh-FFE Dh
8
TIMER A
TIMER A peripheral interrupts
TASR
no
FFEAh-FFEBh
9
TIMER B
TIMER B peripheral interrupts
TBSR
no
FFE8h-FFE 9h
10
SCI
SCI Peripheral interrupts
SCISR
Lower
Priority
no
FFE6h-FFE 7h
11
AVD
Auxiliary Voltage detector interrupt
SICSR
no
FFE4h-FFE 5h
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