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參數資料
型號: ADSP-21366SCSQZENG
廠商: ANALOG DEVICES INC
元件分類: 數字信號處理
英文描述: SHARC Processor
中文描述: 16-BIT, 55.55 MHz, OTHER DSP, PQFP144
封裝: LEAD FREE, MS-026BFB-HD, HSLQFP-144
文件頁數: 41/54頁
文件大小: 559K
代理商: ADSP-21366SCSQZENG
ADSP-21365/6
Preliminary Technical Data
Rev. PrA
|
Page 41 of 54
|
September 2004
SPI Interface—Slave
Table 37. SPI Interface Protocol —Slave Switching and Timing Specifications
Parameter
Timing Requirements
t
SPICLKS
t
SPICHS
t
SPICLS
t
SDSCO
Min
Max
Unit
Serial Clock Cycle
Serial Clock High Period
Serial Clock Low Period
SPIDS Assertion to First SPICLK Edge
CPHASE = 0
CPHASE = 1
Last SPICLK Edge to SPIDS Not Asserted, CPHASE = 0
Data Input Valid to SPICLK edge (Data Input Set-up Time)
SPICLK Last Sampling Edge to Data Input Not Valid
SPIDS Deassertion Pulse Width (CPHASE=0)
4 × t
PCLK
2 × t
PCLK
2 × t
PCLK
– 2
ns
ns
ns
ns
2 × t
PCLK
2 × t
PCLK
2 × t
PCLK
2
2
2 × t
PCLK
t
HDS
t
SSPIDS
t
HSPIDS
t
SDPPW
ns
ns
ns
ns
Switching Characteristics
t
DSOE
t
DSDHI
t
DDSPIDS
t
HDSPIDS
t
DSOV
SPIDS Assertion to Data Out Active
SPIDS Deassertion to Data High Impedance
SPICLK Edge to Data Out Valid (Data Out Delay Time)
SPICLK Edge to Data Out Not Valid (Data Out Hold Time)
SPIDS Assertion to Data Out Valid (CPHASE=0)
0
0
4
4
9.4
ns
ns
ns
ns
ns
2 × t
PCLK
5 × t
PCLK
Figure 34. SPI Slave Timing
t
HSPIDS
t
DDSPIDS
t
DSDHI
LSB
MSB
MSB
VALID
t
DSOE
t
DDSPIDS
t
HDLSBS
MISO
(OUTPUT)
MOSI
(INPUT)
t
SSPIDS
SPIDS
(INPUT)
SPICLK
(CP = 0)
(INPUT)
SPICLK
(CP = 1)
(INPUT)
t
SDSCO
t
SPICHS
t
SPICLS
t
SPICLS
t
SPICLKS
t
HDS
t
SPICHS
t
SSPIDS
t
HSPIDS
t
DSDHI
LSB
VALID
MSB
MSB
VALID
t
DSOE
t
DDSPIDS
MISO
(OUTPUT)
MOSI
(INPUT)
t
SSPIDS
LSB
VALID
LSB
CPHASE=1
CPHASE=0
t
SDPPW
t
DSOV
t
HDLSBS
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