参数资料
型号: ADZS-21469-EZBRD
厂商: Analog Devices Inc
文件页数: 33/62页
文件大小: 0K
描述: KIT EVAL EZ BOARD ADSP-21469
特色产品: SHARC? 21469 EZ-KIT? and EZ-Board? for SHARC Processors
标准包装: 1
系列: SHARC®
类型: DSP
适用于相关产品: ADSP-2146x
所含物品:
Preliminary Technical Data
Link Ports
ADSP-21462/ADSP-21465/ADSP-21467/ADSP-21469
from speed specifications will result in unrealistically small skew
Calculation of link receiver data setup and hold relative to link
clock is required to determine the maximum allowable skew
that can be introduced in the transmission path between
LDATA and LCLK. Setup skew is the maximum delay that can
be introduced in LDATA relative to LCLK, (setup skew = t LCLK-
TWH min– t DLDCH – t SLDCL ). Hold skew is the maximum delay
that can be introduced in LCLK relative to LDATA, (hold skew
= t LCLKTWL min – t HLDCH – t HLDCL ). Calculations made directly
Table 29. Link Ports – Receive
times because they include multiple tester guardbands. The
setup and hold skew times shown below are calculated to
include only one tester guardband.
Setup Skew = TBD ns max
Hold Skew = TBD ns max
Note that there is a two-cycle effect latency between the link
port enable instruction and the DSP enabling the link port.
Parameter
Min
Max
Unit
Timing Requirements
t SLDCL
t HLDCL
t LCLKIW
t LCLKRWL
t LCLKRWH
Data Setup Before LCLK Low
Data Hold After LCLK Low
LCLK Period
LCLK Width Low
LCLK Width High
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
ns
ns
ns
ns
ns
Switching Characteristics
TBD
TBD
t DLALC
LACK Low Delay After LCLK High 1
TBD
TBD
ns
1
LACK goes low with tDLALC relative to rise of LCLK after first byte, but does not go low if the receiver's link buffer is not about to fill.
t LCLKIW
LCLK
t LCLKRWH
t S LDCL
t HLDCL
t LCLKRWL
LDAT7-0
IN
t DLALC
LACK (OUT)
Figure 20. Link Ports—Receive
Rev. PrC
| Page 33 of 62 | January 2009
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