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參數(shù)資料
型號: ADSP-21XX4444
廠商: Analog Devices, Inc.
英文描述: ADSP-2100 Family DSP Microcomputers
中文描述: 的ADSP - 2100系列DSP的微機
文件頁數(shù): 20/32頁
文件大小: 231K
代理商: ADSP-21XX4444
ADSP-21mod870
TIMING PARAMETERS
–20–
REV. 0
Parameter
Min
Max
Unit
Interrupts and Flags
Timing Requirements
:
t
IFS
t
IFH
Switching Characteristics
:
t
FOH
t
FOD
IRQx
, FI, or PFx Setup before CLKOUT Low
1, 2, 3, 4
IRQx
, FI, or PFx Hold after CLKOUT High
1, 2, 3, 4
0.25 t
CK
+ 15
0.25 t
CK
ns
ns
Flag Output Hold after CLKOUT Low
5
Flag Output Delay from CLKOUT Low
5
0.25 t
CK
– 7
ns
ns
0.5 t
CK
+ 6
NOTES
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, Third Edition,
for further information
on interrupt servicing.)
2
Edge-sensitive interrupts require pulsewidths 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, PF3, PF4, PF5, PF6, PF7.
5
Flag outputs = PFx, FL0, FL1, FL2, Flag_out.
t
FOD
t
FOH
t
IFS
CLKOUT
FLAG
OUTPUTS
IRQ
x
FI
PFx
t
IFH
Figure 22. Interrupts and Flags
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