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ADSP-21462/ADSP-21465/ADSP-21467/ADSP-21469
Preliminary Technical Data
Memory Write — Bus Master
Use these specifications for asynchronous interfacing to memo-
ries. Note that timing for AMI_ACK, AMI_DATA, AMI_RD,
AMI_WR, and strobe timing parameters only apply to asyn-
chronous access mode.
Table 28. Memory Write — Bus Master
Parameter Min Max Unit
Timing Requirements
t DAAK
AMI_ACK Delay from Address, Selects 1, 2
TBD TBD ns
t DSAK
AMI_ACK Delay from AMI_WR Low
1, 3
TBD TBD ns
Switching Characteristics
TBD TBD
t DAWH
Address, Selects to AMI_WR Deasserted 2
TBD TBD ns
t DAWL
Address, Selects to AMI_WR Low
TBD TBD ns
t WW
t DDWH
t DWHA
t DWHD
AMI_WR Pulse Width TBD TBD ns
Data Setup Before AMI_WR High TBD TBD ns
Address Hold After AMI_WR Deasserted TBD TBD ns
Data Hold After AMI_WR Deasserted TBD TBD ns
t DATRWH
Data Disable After AMI_WR Deasserted 4
TBD TBD ns
t WWR
t DDWR
t WDE
AMI_WR High to AMI_WR, AMI_RD Low TBD TBD ns
Data Disable Before AMI_RD Low TBD TBD ns
AMI_WR Low to Data Enabled TBD TBD ns
W = (number of wait states specified in AMICTLx register) × t S DDR2_CLK H = (number of hold cycles specified in AMICTLx register) x t DDR2_CLK
1
2
3
4
AMI_ACK delay/setup: System must meet t DAAK , or t DSAK , for deassertion of AMI_ACK (low). For asynchronous assertion of AMI_ACK (high) user must meet t DAAK or t DSAK .
The falling edge of AMI_MSx is referenced.
Note that timing for AMI_ACK, AMI_DATA, AMI_RD, AMI_WR, and strobe timing parameters only applies to asynchronous access mode.
See Test Conditions on Page 52 for calculation of hold times given capacitive and dc loads.
AMI_ADDR
MSx
t DAWL
t DAWH
t WW
t DWHA
AMI_WR
t WWR
AMI_DATA
t WDE
t DDWH
t DATRWH
t DDWR
t DAAK
t D S AK
t DWHD
AMI_ACK
AMI_RD
Figure 19. Memory Write — Bus Master
Rev. PrC
| Page 32 of 62 | January 2009
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相关PDF资料
ADZS-21479-EZLITE
KIT EVAL EZ BOARD ADSP-2147X
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KIT EVAL EZ BOARD ADSP-2148X
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相关代理商/技术参数
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功能描述:BOARD EVAL FOR ADZS-2147X RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:SHARC® 标准包装:1 系列:PICDEM™ 类型:MCU 适用于相关产品:PIC10F206，PIC16F690，PIC16F819 所含物品:板，线缆，元件，CD，PICkit 编程器 产品目录页面:659 (CN2011-ZH PDF)
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ADZS-21489-EZBRD
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ADZS-21489-EZBRD
制造商:Analog Devices 功能描述:EZ BOARD SUPPORTING SHARC 21489
ADZS-21489-EZLITE
功能描述:KIT EVAL EZ BOARD ADSP-2148X RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:SHARC® 产品培训模块:Blackfin® Processor Core Architecture Overview
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ADZS-2189M-EZLITE
功能描述:开发板和工具包 - 其他处理器 ADZS-2189M-EZLITE
RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
ADZS-218X-ICE-2.5V
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