參數(shù)資料
型號(hào): ADSP-21479KSWZ-2A
廠(chǎng)商: Analog Devices Inc
文件頁(yè)數(shù): 30/72頁(yè)
文件大小: 0K
描述: IC DSP SHARC 266MHZ LP 100LQFP
標(biāo)準(zhǔn)包裝: 1
系列: SHARC®
類(lèi)型: 浮點(diǎn)
接口: DAI,DPI,EBI/EMI,I²C,SPI,SPORT,UART/USART
時(shí)鐘速率: 266MHz
非易失內(nèi)存: ROM(4Mb)
芯片上RAM: 5Mb
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.20V
工作溫度: 0°C ~ 70°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 100-LQFP 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 100-LQFP-EP(14x14)
包裝: 托盤(pán)
其它名稱(chēng): Q6418433
Rev. A
|
Page 36 of 72
|
September 2011
AMI Write
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 Write
Parameter
Min
Max
Unit
Timing Requirements
tDAAK
AMI_ACK Delay from Address Selects
1, 2
tSDCLK – 10.1 + W
ns
tDSAK
AMI_ACK Delay from AMI_WR Low
1, 3
W – 7.1
ns
Switching Characteristics
tDAWH
Address Selects to AMI_WR Deasserted2
tSDCLK –4.4 + W
ns
tDAWL
Address Selects to AMI_WR Low2
tSDCLK – 4.5
ns
tWW
AMI_WR Pulse Width
W – 1.3
ns
tDDWH
Data Setup Before AMI_WR High
tSDCLK – 4.3 + W
ns
tDWHA
Address Hold After AMI_WR Deasserted
H
ns
tDWHD
Data Hold After AMI_WR Deasserted
H
ns
tDATRWH
Data Disable After AMI_WR Deasserted4
tSDCLK – 1.37 + H
tSDCLK + 6.75+ H
ns
tWWR
AMI_WR High to AMI_WR Low5
tSDCLK – 1.5+ H
ns
tDDWR
Data Disable Before AMI_RD Low
2 × tSDCLK – 7.1
ns
tWDE
AMI_WR Low to Data Enabled
tSDCLK – 4.5
ns
W = (number of wait states specified in AMICTLx register) × tSDCLK
H = (number of hold cycles specified in AMICTLx register) × tSDCLK
1 AMI_ACK delay/setup: System must meet t
DAAK, or tDSAK, for deassertion of AMI_ACK (low).
2 The falling edge of AMI_MSx is referenced.
3 Note that timing for AMI_ACK, ADDR, DATA, AMI_RD, AMI_WR, and strobe timing parameters only applies to asynchronous access mode.
4 See Test Conditions on Page 61 for calculation of hold times given capacitive and dc loads.
5 For Write to Write: tSDCLK + H, for both same bank and different bank. For Write to Read: 3 × tSDCLK + H , for the same bank and different banks.
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