參數(shù)資料
型號(hào): ADSP-21488KSWZ-3A1
廠商: Analog Devices Inc
文件頁數(shù): 27/68頁
文件大?。?/td> 0K
描述: IC DSP SHARC 400MHZ 100LQFP
標(biāo)準(zhǔn)包裝: 1
系列: SHARC®
類型: 浮點(diǎn)
接口: EBI/EMI,DAI,I²C,SPI,SPORT,UART/USART
時(shí)鐘速率: 350MHz
非易失內(nèi)存: 外部
芯片上RAM: 3Mb
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.10V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 100-LQFP-EP(14x14)
包裝: 托盤
Rev. B
|
Page 33 of 68
|
March 2013
AMI Read
Use these specifications for asynchronous interfacing to memo-
ries. Note that timing for AMI_ACK, ADDR, DATA, AMI_RD,
AMI_WR, and strobe timing parameters only apply to asyn-
chronous access mode.
Table 32. AMI Read
Parameter
Min
Max
Unit
Timing Requirements
tDAD
1, 2, 3
Address Selects Delay to Data Valid
W + tSDCLK –5.4
ns
tDRLD
AMI_RD Low to Data Valid
W – 3.2
ns
tSDS
Data Setup to AMI_RD High
2.5
ns
tHDRH
4, 5
Data Hold from AMI_RD High
0
ns
tDAAK
AMI_ACK Delay from Address, Selects
tSDCLK –9.5 + W
ns
tDSAK
4
AMI_ACK Delay from AMI_RD Low
W – 7
ns
Switching Characteristics
tDRHA
Address Selects Hold After AMI_RD High
RHC + 0.20
ns
tDARL
Address Selects to AMI_RD Low
tSDCLK – 3.8
ns
tRW
AMI_RD Pulse Width
W – 1.4
ns
tRWR
AMI_RD High to AMI_RD Low
HI + tSDCLK – 1
ns
W = (number of wait states specified in AMICTLx register) × tSDCLK.
RHC = (number of Read Hold Cycles specified in AMICTLx register) × tSDCLK
Where PREDIS = 0
HI = RHC: Read to Read from same bank
HI = RHC + IC: Read to Read from different bank
HI = RHC + Max (IC, (4 × tSDCLK)): Read to Write from same or different bank
Where PREDIS = 1
HI = RHC + Max (IC, (4 × tSDCLK)): Read to Write from same or different bank
HI = RHC + (3 × tSDCLK): Read to Read from same bank
HI = RHC + Max (IC, (3 × tSDCLK): Read to Read from different bank
IC = (number of idle cycles specified in AMICTLx register) × tSDCLK
H = (number of hold cycles specified in AMICTLx register) × tSDCLK
1 Data delay/setup: System must meet tDAD, tDRLD, or tSDS.
2 The falling edge of MSx, is referenced.
3 The maximum limit of timing requirement values for tDAD and tDRLD parameters are applicable for the case where AMI_ACK is always high and when the ACK feature is not
used.
4 Note that timing for AMI_ACK, ADDR, DATA, AMI_RD, AMI_WR, and strobe timing parameters only apply to asynchronous access mode.
5 Data hold: User must meet tHDRH in asynchronous access mode. See Test Conditions on Page 55 for the calculation of hold times given capacitive and dc loads.
6 AMI_ACK delay/setup: User must meet tDAAK, or tDSAK, for deassertion of AMI_ACK (low).
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