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參數(shù)資料
型號: 71M6541D-IGT/F
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 模擬信號調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP64
封裝: LEAD FREE, LQFP-64
文件頁數(shù): 106/165頁
文件大小: 2208K
代理商: 71M6541D-IGT/F
v1.1
2008–2011 Teridian Semiconductor Corporation
45
Interrupt Enable
Interrupt Flag
Interrupt Description
Name
Location
Name
Location
EX_SPI
EX_EEX
EX_XPULSE
EX_YPULSE
EX_WPULSE
EX_VPULSE
0x2701[7]
0x2700[7]
0x2700[6]
0x2700[5]
0x2701[6]
0x2701[5]
IE_SPI
IE_EEX
IE_XPULSE
IE_YPULSE
IE_WPULSE
IE_VPULSE
SFR 0xF8[7]
SFR 0xE8[7]
SFR 0xE8[6]
SFR 0xE8[5]
SFR 0xF8[4]
SFR 0xF8[3]
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
External interrupt 0
Serial channel 1 interrupt
1
Timer 0 interrupt
External interrupt 2
2
External interrupt 1
External interrupt 3
3
Timer 1 interrupt
External interrupt 4
4
Serial channel 0 interrupt
External interrupt 5
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
IP1[x]
IP0[x]
Priority Level
0
Level 0 (lowest)
0
1
Level 1
1
0
Level 2
1
Level 3 (highest)
Table 36: Interrupt Priority Registers (IP0 and IP1)
Register
Address
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
IP0
SFR 0xA9
IP0[5]
IP0[4]
IP0[3]
IP0[2]
IP0[1]
IP0[0]
IP1
SFR 0xB9
IP1[5]
IP1[4]
IP1[3]
IP1[2]
IP1[1]
IP1[0]
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