參數(shù)資料
型號(hào): ADSP-21266
廠商: Analog Devices, Inc.
英文描述: SHARC Embedded Processor
中文描述: SHARC處理器嵌入式處理器
文件頁(yè)數(shù): 34/44頁(yè)
文件大?。?/td> 426K
代理商: ADSP-21266
Rev. B
|
Page 34 of 44
|
May 2005
ADSP-21266
SPI Interface Protocol—Master
Table 30. SPI Interface Protocol—Master
Parameter
Timing Requirements
t
SSPIDM
t
HSPIDM
Min
Max
Unit
Data Input Valid to SPICLK Edge (Data Input Setup Time)
SPICLK Last Sampling Edge to Data Input Not Valid
5
2
ns
ns
Switching Characteristics
t
SPICLKM
t
SPICHM
t
SPICLM
t
DDSPIDM
t
HDSPIDM
t
SDSCIM
t
HDSM
t
SPITDM
Serial Clock Cycle
Serial Clock High Period
Serial Clock Low Period
SPICLK Edge to Data Out Valid (Data Out Delay Time)
SPICLK Edge to Data Out Not Valid (Data Out Hold Time)
FLAG3
0 OUT (SPI Device Select) Low to First SPICLK Edge
Last SPICLK Edge to FLAG3
0 OUT High
Sequential Transfer Delay
8 × t
CCLK
4 × t
CCLK
– 2
4 × t
CCLK
– 2
ns
ns
ns
ns
ns
ns
ns
ns
3
10
4 × t
CCLK
– 2
4 × t
CCLK
– 1
4 × t
CCLK
– 1
Figure 25. SPI Interface Protocol—Master
LSB
VALID
MSB
VALID
t
SSPIDM
t
HSPIDM
t
HDSPIDM
LSB
MSB
t
HSPIDM
t
DDSPIDM
MOSI
(OUTPUT)
MISO
(INPUT)
FLG3-0
(OUTPUT)
SPICLK
(CP = 0)
(OUTPUT)
SPICLK
(CP = 1)
(OUTPUT)
t
SPICHM
t
SPICLM
t
SPICLM
t
SPICLKM
t
SPICHM
t
HDSM
t
SPITDM
t
HDSPIDM
LSB
VALID
LSB
MSB
MSB
VALID
t
HSPIDM
t
DDSPIDM
MOSI
(OUTPUT)
MISO
(INPUT)
t
SSPIDM
CPHASE = 1
CPHASE = 0
t
SDSCIM
t
SSPIDM
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