参数资料
型号: ADSP-2191MBSTZ-140
厂商: Analog Devices Inc
文件页数: 18/48页
文件大小: 0K
描述: IC DSP CONTROLLER 16BIT 144LQFP
标准包装: 1
系列: ADSP-21xx
类型: 定点
接口: 主机接口,SPI,SSP,UART
时钟速率: 140MHz
非易失内存: 外部
芯片上RAM: 160kB
电压 - 输入/输出: 3.00V,3.30V
电压 - 核心: 2.50V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
其它名称: ADSP-2191MBSTZ140
–25–
REV. A
ADSP-2191M
Host Port ALE Mode Write Cycle Timing
Table 15 and Figure 14 describe Host port write operations in
Address Latch Enable (ALE) mode. For more information on
ACK, Ready, ALE, and ACC mode selection, see the Host port
modes description on Page 8.
Table 15. Host Port ALE Mode Write Cycle Timing
Parameter
Min
Max
Unit
Switching Characteristics
t
WHKS1
HWR Asserted to HACK Asserted (Setup, ACK Mode) First
Byte
10
5t
HCLK +tNH
1
ns
t
WHKS2
HWR Asserted to HACK Asserted (Setup, ACK Mode)2
10
ns
t
WHKH
HWR Deasserted to HACK Deasserted (Hold, ACK Mode)
10
ns
t
WHS
HWR Asserted to HACK Asserted (Setup, Ready Mode)
10
ns
t
WHH
HWR Asserted to HACK Deasserted (Hold, Ready Mode)
First Byte
05t
HCLK +tNH
1
ns
Timing Requirements
t
CSAL
HCMS or HCIOMS Asserted to HALE Asserted
0ns
t
ALPW
HALE Asserted Pulsewidth
4
ns
t
ALCSW
HALE Deasserted to
HCMS or HCIOMS Deasserted
1
ns
t
WCSW
HWR Deasserted to HCMS or HCIOMS Deasserted
0
ns
t
ALW
HALE Deasserted to
HWR Asserted
1
ns
t
WCS
HWR Deasserted (After Last Byte) to HCMS or
HCIOMS Deasserted (Ready for Next Write)
0ns
t
HKWD
HACK Asserted to
HWR Deasserted (Hold, ACK Mode)
1.5
ns
t
AALS
Address Valid to HALE Deasserted (Setup)
2
ns
t
ALAH
HALE Deasserted to Address Invalid (Hold)
4
ns
t
DWS
Data Valid to
HWR Deasserted (Setup)
4
ns
t
WDH
HWR Deasserted to Data Invalid (Hold)
1
ns
1t
NH are peripheral bus latencies (n
tHCLK); these are internal DSP latencies related to the number of peripheral DMAs attempting to access DSP memory
at the same time.
2Measurement is for the second, third, or fourth byte of a host write transaction. The quantity of bytes to complete a host write transaction is dependent on
the data bus size (8 or 16 bits) and the data type (16 or 24 bits).
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