参数资料
型号: ADSP-21990BSTZ
厂商: ANALOG DEVICES INC
元件分类: 数字信号处理
英文描述: High-Performance Mixed-Signal DSP, 160 MHz, 4K Words Program Memory RAM; Package: LQFP 1.4 MM; No of Pins: 176; Temperature Range: Ind
中文描述: 16-BIT, 160 MHz, OTHER DSP, PQFP176
封装: ROHS COMPLIANT, MS-026BGA, LQFP-176
文件页数: 32/50页
文件大小: 2503K
代理商: ADSP-21990BSTZ
Rev. A
|
Page 38 of 50
|
August 2007
ADSP-21990
Serial Peripheral Interface Port—Slave Timing
Table 14 and Figure 17 describe SPI port slave operations.
Table 14. Serial Peripheral Interface (SPI) Port—Slave Timing
Parameter
Min
Max
Unit
Timing Requirements
tSPICHS
Serial Clock High Period
2tHCLK
ns
tSPICLS
Serial Clock Low Period
2tHCLK
ns
tSPICLK
Serial Clock Period
4tHCLK
ns
tHDS
Last SPICLK Edge to SPISS Not Asserted
2tHCLK
ns
tSPITDS
Sequential Transfer Delay
2tHCLK + 4
ns
tSDSCI
SPISS Assertion to First SPICLK Edge
2tHCLK
ns
tSSPID
Data Input Valid to SCLK Edge (Data Input Setup)
1.6
ns
tHSPID
SCLK Sampling Edge to Data Input Invalid (Data In Hold)
2.4
ns
Switching Characteristics
tDSOE
SPISS Assertion to Data Out Active
0
8
ns
tDSDHI
SPISS Deassertion to Data High Impedance
0
10
ns
tDDSPID
SCLK Edge to Data Out Valid (Data Out Delay)
0
10
ns
tHDSPID
SCLK Edge to Data Out Invalid (Data Out Hold)
0
10
ns
Figure 17. Serial Peripheral Interface (SPI) Port—Slave Timing
tHSPID
tDDSPID
tDSDHI
LSB
MSB
VALID
tHSPID
tDSOE
tHDSPID
MISO
(OUTPUT)
MOSI
(INPUT)
SPISS
(INPUT)
SCLK
(CPOL = 0)
(INPUT)
SCLK
(CPOL = 1)
(INPUT)
tSPICHS
tSPICLS
tSPICLK
tHDS
tSPICHS
tSSPID
tHSPID
tDSDHI
LSB
VALID
MSB
VALID
tDSOE
tDDSPID
MISO
(OUTPUT)
MOSI
(INPUT)
LSB
VALID
LSB
tSPITDS
tDDSPID
CPHA = 0
CPHA = 1
tSDSCI
tSSPID
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