參數(shù)資料
型號: DSP1627
英文描述: TVS 400W 6.5V BIDIRECT SMA
中文描述: DSP1627數(shù)字信號處理器
文件頁數(shù): 82/154頁
文件大?。?/td> 2365K
代理商: DSP1627
Data Sheet
March 2000
DSP1627 Digital Signal Processor
82
Lucent Technologies Inc.
10 Timing Characteristics for 5 V Operation
(continued)
10.7 External Memory Interface
The following timing diagrams, characteristics, and requirements do not apply to interactions with delayed external
memory enables unless so stated. See the DSP1611/17/18/27 Digital Signal Processor Information Manualfor a
detailed description of the external memory interface including other functional diagrams.
*
W = number of wait-states.
Figure 18. Enable Transition Timing
Table 78. Timing Characteristics for External Memory Enables (EROM, ERAMHI, IO, ERAMLO)
Abbreviated Reference
t33
t34
Parameter
Min
0
–1
Max
7
6
Unit
ns
ns
CKO to ENABLE Active (low to low)
CKO to ENABLE Inactive (low to high)
Table 79. Timing Characteristics for Delayed External Memory Enables (ioc = 0x000F)
Abbreviated Reference
t33
Parameter
Min
T/2 – 2
Max
T/2 + 7
Unit
ns
CKO to Delayed ENABLE Active (low to low)
CKO
ENABLE
t34
t33
W
*
= 0
V
OH
V
OL
V
OH
V
OL
5-4020 (F).b
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