Datasheet

Rev. A | Page 42 of 80 | July 2011
ADSP-BF504/ADSP-BF504F/ADSP-BF506F
Serial Peripheral Interface (SPI) Port—Slave Timing
Table 35 and Figure 24 describe SPI port slave operations.
Table 35. Serial Peripheral Interface (SPI) Port—Slave Timing
Parameter
V
DDEXT
= 1.8 V V
DDEXT
= 2.5 V/3.3 V
Min Max Min Max Unit
Timing Requirements
t
SPICHS
Serial Clock High Period 2 × t
SCLK
–1.5 2 × t
SCLK
–1.5 ns
t
SPICLS
Serial Clock Low Period 2 × t
SCLK
–1.5 2 × t
SCLK
–1.5 ns
t
SPICLK
Serial Clock Period 4 × t
SCLK
4 × t
SCLK
ns
t
HDS
Last SCK Edge to SPISS Not Asserted 2 × t
SCLK
–1.5 2 × t
SCLK
–1.5 ns
t
SPITDS
Sequential Transfer Delay 2 × t
SCLK
–1.5 2 × t
SCLK
–1.5 ns
t
SDSCI
SPISS Assertion to First SCK Edge 2 × t
SCLK
–1.5 2 × t
SCLK
–1.5 ns
t
SSPID
Data Input Valid to SCK Edge (Data Input Setup) 1.6 1.6 ns
t
HSPID
SCK Sampling Edge to Data Input Invalid 2.0 1.6 ns
Switching Characteristics
t
DSOE
SPISS Assertion to Data Out Active 0 12.0 0 10.3 ns
t
DSDHI
SPISS Deassertion to Data High Impedance 0 11.0 0 9.0 ns
t
DDSPID
SCK Edge to Data Out Valid (Data Out Delay) 10 10 ns
t
HDSPID
SCK Edge to Data Out Invalid (Data Out Hold) 0 0 ns
Figure 24. Serial Peripheral Interface (SPI) Port—Slave Timing
t
SPICLK
t
HDS
t
SPITDS
t
SDSCI
t
SPICLS
t
SPICHS
t
DSOE
t
DDSPID
t
DDSPID
t
DSDHI
t
HDSPID
t
SSPID
t
DSDHI
t
HDSPID
t
DSOE
t
HSPID
t
SSPID
t
DDSPID
SPIxSS
(INPUT)
SPIxSCK
(INPUT)
SPIxMISO
(OUTPUT)
SPIxMOSI
(INPUT)
SPIxMISO
(OUTPUT)
SPIxMOSI
(INPUT)
CPHA = 1
CPHA = 0
t
HSPID