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參數(shù)資料
型號(hào): ADSP-21MOD980N
廠(chǎng)商: Analog Devices, Inc.
英文描述: MultiPort Internet Gateway Processor
中文描述: 通寶互聯(lián)網(wǎng)網(wǎng)關(guān)處理器
文件頁(yè)數(shù): 27/42頁(yè)
文件大小: 566K
代理商: ADSP-21MOD980N
27
REV. PrB
6/2001
For current information contact Analog Devices at (800) ANALOGD
ADSP-21mod980N
PRELIMINARY TECHNICAL DATA
Interrupts and Flags
Table 10. Interrupts and Flags
Parameter
Description
Min.
Max
Unit
Timing Requirements:
t
IFS
IRQx, FI, or PFx Setup before CLKOUT Low
1,
2, 3, 4
0.25t
CK
+ 10
ns
t
IFH
IRQx, FI, or PFx Hold after CLKOUT High
1, 2, 3, 4
0.25t
CK
ns
Switching Characteristics:
t
FOH
Flag Output Hold after CLKOUT Low
5
0.5t
CK
- 5
ns
t
FOD
Flag Output Delay from CLKOUT Low
5
0.5t
CK
+ 4
ns
1
If IRQx and FI inputs meet t
IFS
and t
IFH
setup/hold requirements, they will be recognized during the current clock cycle; otherwise the signals will be
recognized on the following cycle. (Refer to Interrupt Controller Operation in the Program Control chapter of the
ADSP-2100 Family User
s Manual
for
further information on interrupt servicing.)
2
Edge-sensitive interrupts require pulse widths greater than 10 ns; level-sensitive interrupts must be held low until serviced.
3
IRQx = IRQ0, IRQ1, IRQ2, IRQL0, IRQL1, IRQE.
4
PFx = PF0, PF1, PF2, PF4, PF5, PF6, PF7.
5
Flag Outputs = PFx, Flag_out
4
.
Figure 20. Interrupts and Flags
t
IFH
t
IFS
CLKOUT
IRQ
x
FI
PFx
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