参数资料
型号: 71M6541F-DB
厂商: Maxim Integrated Products
文件页数: 45/166页
文件大小: 0K
描述: DEMO BOARD 71M6541F
标准包装: 1
系列: *
71M6541D/F/G and 71M6542F/G Data Sheet
Table 33: Interrupt Enable and Flag Bits
Interrupt Enable
Name Location
Interrupt Flag
Name Location
Interrupt Description
EX0
EX1
EX2
EX3
EX4
EX5
EX6
EX_XFER
EX_RTC1S
EX_RTC1M
EX_RTCT
EX_SPI
EX_EEX
EX_XPULSE
EX_YPULSE
EX_WPULSE
EX_VPULSE
SFR 0xA8[[0]
SFR 0xA8[2]
SFR 0xB8[1]
SFR 0xB8[2]
SFR 0xB8[3]
SFR 0xB8[4]
SFR 0xB8[5]
0x2700[0]
0x2700[1]
0x2700[2]
0x2700[4]
0x2701[7]
0x2700[7]
0x2700[6]
0x2700[5]
0x2701[6]
0x2701[5]
IE0
IE1
IEX2
IEX3
IEX4
IEX5
IEX6
IE_XFER
IE_RTC1S
IE_RTC1M
IE_RTCT
IE_SPI
IE_EEX
IE_XPULSE
IE_YPULSE
IE_WPULSE
IE_VPULSE
SFR 0x88[1]
SFR 0x88[3]
SFR 0xC0[1]
SFR 0xC0[2]
SFR 0xC0[3]
SFR 0xC0[4]
SFR 0xC0[5]
SFR 0xE8[0]
SFR 0xE8[1]
SFR E0x8[2]
SFR 0xE8[4]
SFR 0xF8[7]
SFR 0xE8[7]
SFR 0xE8[6]
SFR 0xE8[5]
SFR 0xF8[6]
SFR 0xF8[5]
External interrupt 0
External interrupt 1
External interrupt 2
External interrupt 3
External interrupt 4
External interrupt 5
External interrupt 6
XFER_BUSY interrupt (int 6)
RTC_1SEC interrupt (int 6)
RTC_1MIN interrupt (int 6)
RTC_T alarm clock interrupt (int 6)
SPI interrupt
EEPROM interrupt
CE_XPULSE interrupt (int 2)
CE_YPULSE interrupt (int 2)
CE_WPULSE interrupt (int 2)
CE_VPULSE interrupt (int 2)
Interrupt Priority Level Structure
All interrupt sources are combined in groups, as shown in Table 34 .
Table 34: Interrupt Priority Level Groups
Group
Group Members
0
1
2
3
4
5
External interrupt 0
Timer 0 interrupt
External interrupt 1
Timer 1 interrupt
Serial channel 0 interrupt
Serial channel 1 interrupt
External interrupt 2
External interrupt 3
External interrupt 4
External interrupt 5
External interrupt 6
Each group of interrupt sources can be programmed individually to one of four priority levels (as shown in
Table 35) by setting or clearing one bit in the SFR interrupt priority register IP0 ( SFR 0xA9 ) and one in IP1
(SFR 0xB9) ( Table 36 ). If requests of the same priority level are received simultaneously, an internal polling
sequence as shown in Table 37 determines which request is serviced first.
Changing interrupt priorities while interrupts are enabled can easily cause software defects. It is best
to set the interrupt priority registers only once during initialization before interrupts are enabled.
Table 35: Interrupt Priority Levels
Rev 4
IP1 [x]
0
0
1
1
IP0 [x]
0
1
0
1
Priority Level
Level 0 (lowest)
Level 1
Level 2
Level 3 (highest)
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