参数资料
型号: ADSP-21489KSWZ-4B
厂商: Analog Devices Inc
文件页数: 46/68页
文件大小: 0K
描述: IC CCD SIGNAL PROCESSOR 176LQFP
标准包装: 1
系列: SHARC®
类型: 浮点
接口: EBI/EMI,DAI,I²C,SPI,SPORT,UART/USART
时钟速率: 400MHz
非易失内存: 外部
芯片上RAM: 5Mb
电压 - 输入/输出: 3.30V
电压 - 核心: 1.10V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 176-LQFP 裸露焊盘
供应商设备封装: 176-LQFP-EP(24x24)
包装: 托盘
Rev. B
|
Page 50 of 68
|
March 2013
SPI Interface—Slave
Table 51. SPI Interface Protocol—Slave Switching and Timing Specifications
Parameter
Min
Max
Unit
Timing Requirements
tSPICLKS
Serial Clock Cycle
4 × tPCLK – 2
ns
tSPICHS
Serial Clock High Period
2 × tPCLK – 2
ns
tSPICLS
Serial Clock Low Period
2 × tPCLK – 2
ns
tSDSCO
SPIDS Assertion to First SPICLK Edge
CPHASE = 0
CPHASE = 1
2 × tPCLK
ns
tHDS
Last SPICLK Edge to SPIDS Not Asserted, CPHASE = 0
2 × tPCLK
ns
tSSPIDS
Data Input Valid to SPICLK edge (Data Input Set-up Time)
2
ns
tHSPIDS
SPICLK Last Sampling Edge to Data Input Not Valid
2
ns
tSDPPW
SPIDS Deassertion Pulse Width (CPHASE=0)
2 × tPCLK
ns
Switching Characteristics
tDSOE
SPIDS Assertion to Data Out Active
0
7.5
ns
tDSOE
1
SPIDS Assertion to Data Out Active (SPI2)
0
7.5
ns
tDSDHI
SPIDS Deassertion to Data High Impedance
0
10.5
ns
tDSDHI
1
SPIDS Deassertion to Data High Impedance (SPI2)
0
10.5
ns
tDDSPIDS
SPICLK Edge to Data Out Valid (Data Out Delay Time)
9.5
ns
tHDSPIDS
SPICLK Edge to Data Out Not Valid (Data Out Hold Time)
2 × tPCLK
ns
tDSOV
SPIDS Assertion to Data Out Valid (CPHASE = 0)
5 × tPCLK
ns
1 The timing for these parameters applies when the SPI is routed through the signal routing unit. For more information, see the processor hardware reference, “Serial Peripheral
Interface Port” chapter.
Figure 36. SPI Slave Timing
tSPICHS
tSPICLS
tSPICLKS
tHDS
tSDPPW
tSDSCO
tDSOE
tDDSPIDS
tDSDHI
tHDSPIDS
tHSPIDS
tSSPIDS
tDSDHI
tDSOV
tHSPIDS
tHDSPIDS
SPIDS
(INPUT)
MISO
(OUTPUT)
MOSI
(INPUT)
MISO
(OUTPUT)
MOSI
(INPUT)
CPHASE = 1
CPHASE = 0
SPICLK
(CP = 0,
CP = 1)
(INPUT)
tSSPIDS
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