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ASDP-21060LCW-160 Datasheet(Hoja de datos) 27 Page - Analog Devices

No. de Pieza. ASDP-21060LCW-160
Descripción  SHARC Processor
Descarga  64 Pages
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Fabricante  AD [Analog Devices]
Página de inicio  http://www.analog.com
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ADSP-21060/ADSP-21060L/ADSP-21062/ADSP-21062L/ADSP-21060C/ADSP-21060LC
Rev. F
|
Page 27 of 64
|
March 2008
Synchronous Read/Write—Bus Master
Use these specifications for interfacing to external memory sys-
tems that require CLKIN—relative timing or for accessing a
slave ADSP-2106x (in multiprocessor memory space). These
synchronous switching characteristics are also valid during
asynchronous memory reads and writes except where noted (see
Memory Read—Bus Master on Page 25 and Memory Write—
Bus Master on Page 26). When accessing a slave ADSP-2106x,
these switching characteristics must meet the slave’s timing
requirements for synchronous read/writes (see Synchronous
Read/Write—Bus Slave on Page 29). The slave ADSP-2106x
must also meet these (bus master) timing requirements for data
and acknowledge setup and hold times.
Table 16. Synchronous Read/Write—Bus Master
5 V and 3.3 V
Unit
Parameter
Min
Max
Timing Requirements
tSSDATI
Data Setup Before CLKIN
3 + DT/8
ns
tHSDATI
Data Hold After CLKIN
3.5 – DT/8
ns
tDAAK
ACK Delay After Address, Selects1, 2
14 + 7DT/8 + W
ns
tSACKC
ACK Setup Before CLKIN2
6.5 + DT/4
ns
tHACK
ACK Hold After CLKIN
–1 – DT/4
ns
Switching Characteristics
tDADRO
Address, MSx, BMS, SW Delay After CLKIN1
7 – DT/8
ns
tHADRO
Address, MSx, BMS, SW Hold After CLKIN
–1 – DT/8
ns
tDPGC
PAGE Delay After CLKIN
9 + DT/8
16 + DT/8
ns
tDRDO
RD High Delay After CLKIN
–2 – DT/8
4 – DT/8
ns
tDWRO
WR High Delay After CLKIN
–3 – 3DT/16
4 – 3DT/16
ns
tDRWL
RD/WR Low Delay After CLKIN
8 + DT/4
12.5 + DT/4
ns
tSDDATO
Data Delay After CLKIN
19 + 5DT/16
ns
tDATTR
Data Disable After CLKIN3
0 – DT/8
7 – DT/8
ns
tDADCCK
ADRCLK Delay After CLKIN
4 + DT/8
10 + DT/8
ns
tADRCK
ADRCLK Period
tCK
ns
tADRCKH
ADRCLK Width High
(tCK/2 – 2)
ns
tADRCKL
ADRCLK Width Low
(tCK/2 – 2)
ns
1 The falling edge of MSx, SW, BMS is referenced.
2 ACK delay/setup: user must meet tDAAK or tDSAK or synchronous specification tSAKC for deassertion of ACK (low), all three specifications must be met for assertion of ACK
(high).
3 See Example System Hold Time Calculation on Page 47 for calculation of hold times given capacitive and dc loads.




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