參數(shù)資料
型號: ADSP-2185
廠商: Analog Devices, Inc.
元件分類: 數(shù)字信號處理
英文描述: DSP Microcomputer
中文描述: DSP微機
文件頁數(shù): 18/31頁
文件大?。?/td> 223K
代理商: ADSP-2185
REV. A
ADSP-2185L
TIMING PARAMETERS
(See page 15, Frequency Depending for Timing Specifications, for timing definitions.)
–18–
Parameter
Min
Max
Unit
Clock Signals and Reset
Timing Requirements
:
t
CKI
t
CKIL
t
CKIH
CLKIN External Clock Period
CLKIN Width Low
CLKIN Width High
38
15
15
100
ns
ns
ns
Switching Characteristics
:
t
CKL
t
CKH
t
CKOH
CLKOUT Width Low
CLKOUT Width High
CLKIN High to CLKOUT High
0.5t
CK
– 7
0.5t
CK
– 7
0
ns
ns
ns
20
Control Signals
Timing Requirement
:
t
RSP
t
MS
t
MH
RESET
Width Low
Mode Setup before
RESET
High
Mode Hold after
RESET
High
5t
CK1
2
5
ns
ns
ns
NOTE
1
Applies after power-up sequence is complete. Internal phase lock loop requires no more than 2000 CLKIN cycles assuming stable CLKIN (not including crystal
oscillator start-up time).
t
CKOH
t
CKH
t
CKI
t
CKIH
t
CKIL
t
CKL
t
MH
t
MS
CLKIN
CLKOUT
PF(3:0)
*
RESET
*
PF3 IS MODE D, PF2 IS MODE C, PF1 IS MODE B, PF0 IS MODE A
Figure 19. Clock Signals
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