参数资料
型号: ADSP-21478KBCZ-3A
厂商: Analog Devices Inc
文件页数: 31/76页
文件大小: 0K
描述: IC DSP SHARK 300MHZ 196CSPBGA
标准包装: 1
系列: SHARC®
类型: 浮点
接口: DAI,DPI,EBI/EMI,I²C,SPI,SPORT,UART/USART
时钟速率: 300MHz
非易失内存: ROM(4Mb)
芯片上RAM: 3Mb
电压 - 输入/输出: 3.30V
电压 - 核心: 1.30V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 196-LFBGA,CSPBGA
供应商设备封装: 196-CSPBGA(12x12)
包装: 托盘
Rev. C
|
Page 37 of 76
|
July 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 – 6.32
ns
tDRLD
AMI_RD Low to Data Valid
W – 3
ns
tSDS
4, 5
Data Setup to AMI_RD High
2.6
ns
tHDRH
Data Hold from AMI_RD High
0.4
ns
tDAAK
AMI_ACK Delay from Address Selects
tSDCLK – 10 + W
ns
tDSAK
AMI_ACK Delay from AMI_RD Low
W – 7.0
ns
Switching Characteristics
tDRHA
Address Selects Hold After AMI_RD High
RHC + 0.38
ns
tDARL
Address Selects to AMI_RD Low
tSDCLK – 5
ns
tRW
AMI_RD Pulse Width
W – 1.4
ns
tRWR
AMI_RD High to AMI_RD Low
HI + tSDCLK – 1.2
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 AMI_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 t
HDRH in asynchronous access mode. See Test Conditions on Page 65 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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