參數(shù)資料
型號(hào): ADSP-21020
廠商: Analog Devices, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: 32/40-Bit IEEE Floating-Point DSP Microprocessor(浮點(diǎn)型DSP處理器)
中文描述: 32/40 IEEE浮點(diǎn)DSP微處理器(浮點(diǎn)型DSP的處理器)
文件頁(yè)數(shù): 14/32頁(yè)
文件大?。?/td> 424K
代理商: ADSP-21020
ADSP-21020
REV. C
–14–
Interrupts
K/B/T Grade K/B/T Grade B/T Grade
K Grade
20 MHz
Min
25 MHz
Min
30 MHz
33.3 MHz Frequency Dependency*
Max Min Max Min
Parameter
Max
Max Min
Max
Unit
Timing Requirement:
t
SIR
IRQ
3-0 Setup before CLKIN High 38
t
HIR
IRQ
3-0 Hold after CLKIN High
t
IPW
IRQ
3-0 Pulse Width
31
0
45
25
0
38
23
0
35
38 + 3DT/4
ns
0
55
ns
t
CK
+ 5
ns
NOTE
*DT = t
CK
– 50 ns
Meeting setup and hold guarantees interrupts will be latched in that cycle. Meeting the pulse width is not necessary if the setup and hold is met. Likewise, meeting the
setup and hold is not necessary if the pulse width is met. See the Hardware Configuration chapter of the
ADSP-21020 User’s Manual
for interrupt servicing informa-
tion.
CLKIN
t
SIR
IRQ3-0
t
HIR
t
IPW
Figure 5. Interrupts
Timer
K/B/T Grade
K/B/T Grade
B/T Grade
K Grade
20 MHz
Min
25 MHz
Min
30 MHz
Min
33.3 MHz Frequency Dependency*
Max Min
Max
Min
Parameter
Max
Max
Max
Unit
Switching Characteristic:
t
DTEX
CLKIN High to TIMEXP
24
24
24
24
ns
NOTE
*DT = t
CK
– 50 ns
CLKIN
t
DTEX
TIMEXP
t
DTEX
Figure 6. TIMEXP
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