参数资料
型号: 951200201
厂商: ATMEL CORP
元件分类: 数字信号处理外设
英文描述: 40-BIT, DSP-FLOATING POINT PROCESSOR, QFP256
封装: MQFP-256
文件页数: 28/50页
文件大小: 702K
代理商: 951200201
34
TSC21020F
4153H–AERO–04/07
Bus Request/Bus Grant
Figure 8. Bus Request/Bus Grant
Parameter
20 MHz
Frequency
Dependency(1)
Unit
Min
Max
Min
Max
tHBR BR Hold after CLKIN High
0
ns
t
SBR BR Setup before CLKIN High
18
18+5DT/16
ns
t
DMDBGL Memory Interface Disable
to BG Low(2)
-2
ns
t
DME CLKIN High to Memory
Interface Enable
25
25 + DT/2
ns
t
DBGL CLKIN High to BG Low
22
ns
tDBGH CLKIN High to BG High
22
ns
Notes:
1. DT = t
CK - 50 ns
Memory Interface = PMA23-0, PMD47-0, PMS1-0, PMRD, PMWR, PMPAGE,
DMA31-0, DMD39-0, DMS3-0, DMRD, DMWR, DMPAGE.
Buses are not granted until completion of current memory access.
See the Memory Interface chapter of the ADSP-21020 User's Manual from
Analog Devices for BG, BR cycle relationships.
2. Guaranteed by design.
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