參數(shù)資料
型號(hào): ADSP-21262SKBC-200
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字信號(hào)處理
英文描述: SHARC Processor
中文描述: 16-BIT, 66.67 MHz, OTHER DSP, PBGA136
封裝: MO-205AE, BGA-136
文件頁(yè)數(shù): 35/44頁(yè)
文件大小: 1295K
代理商: ADSP-21262SKBC-200
ADSP-21262
Rev. A
|
Page 35 of 44
|
May 2004
SPI Interface—Slave
Table 30. SPI Interface Protocol—Slave Switching and Timing Specifications
Parameter
Switching Characteristics
t
DSOE
t
DSDHI
t
DDSPIDS
t
HDSPIDS
t
DSOV
Min
Max
Unit
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
5
5
7.5
ns
ns
ns
ns
ns
2 × t
CCLK
– 2
5 × t
CCLK
+ 2
Timing Requirements
t
SPICLKS
t
SPICHS
t
SPICLS
t
SDSCO
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 Setup Time)
SPICLK Last Sampling Edge to Data Input Not Valid
SPIDS Deassertion Pulse Width (CPHASE = 0)
4 × t
CCLK
2 × t
CCLK
– 2
2 × t
CCLK
– 2
ns
ns
ns
2 × t
CCLK
+ 1
2 × t
CCLK
+ 1
2 × t
CCLK
2
2
2 × t
CCLK
ns
ns
ns
ns
ns
ns
t
HDS
t
SSPIDS
t
HSPIDS
t
SDPPW
Figure 26. SPI Slave Timing
t
HSPIDS
t
DDSPIDS
t
DSDHI
LSB
MSB
MSB VALID
t
DSOE
t
DDSPIDS
t
HDSPIDS
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
HDSPIDS
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