ADSP-BF522 AD [Analog Devices], ADSP-BF522 Datasheet - Page 53

• Manufacturer Part Number: ADSP-BF522
• Description: Blackfin Embedded Processor
• Manufacturer: AD [Analog Devices]

Preliminary Technical Data
Serial Peripheral Interface (SPI) Port—Slave Timing
Table 42
Table 42. Serial Peripheral Interface (SPI) Port—Slave Timing
Parameter
Timing Requirements
t
t
t
t
t
t
t
Switching Characteristics
t
t
t
t
t
SPICHS
SPICLS
SPICLK
HDS
SPITDS
SDSCI
SSPID
DSOE
DSDHI
DDSPID
HDSPID
HSPID
and
Serial Clock High Period
Serial Clock Low Period
Serial Clock Period
Last SCK Edge to SPISS Not Asserted
Sequential Transfer Delay
SPISS Assertion to First SCK Edge
Data Input Valid to SCK Edge (Data Input
Setup)
SCK Sampling Edge to Data Input Invalid
SPISS Assertion to Data Out Active
SPISS Deassertion to Data High Impedance
SCK Edge to Data Out Valid (Data Out Delay)
SCK Edge to Data Out Invalid (Data Out
Hold)
CPHA = 1
CPHA = 0
Figure 27
(INPUT)
(OUTPUT)
(INPUT)
(OUTPUT)
(INPUT)
(CPOL = 0)
(CPOL = 1)
MOSIx
MOSIx
SPISS
MISOx
MISOx
(INPUT)
(INPUT)
SCKx
SCKx
describe SPI port slave operations.
t
DSOE
t
DSOE
t
SDSCI
MSB VALID
t
t
t
DDSPID
t
SPICHS
SPICLS
MSB VALID
SSPID
Figure 27. Serial Peripheral Interface (SPI) Port—Slave Timing
t
HDSPID
MSB
Rev. PrG | Page 53 of 80 | February 2009
t
t
MSB
SPICHS
SPICLS
2 t
2 t
2 t
2 t
2 t
t
HDSPID
t
SCLK
V
t
HSPID
Min
SCLK
SCLK
SCLK
SCLK
SCLK
DDEXT
4
1.6
1.6
0
0
0
–1.5
–1.5
–1.5
–1.5
–1.5
–1.5
ADSP-BF522/524/526
= 1.8 V
Max
12.0
8.5
10
t
DDSPID
t
SSPID
2 t
2 t
2 t
2 t
2 t
V
t
DDEXT
SCLK
Min
SCLK
SCLK
SCLK
SCLK
SCLK
4
1.6
1.6
t
LSB VALID
DDSPID
0
0
0
–1.5
= 2.5/3.3 V
–1.5
–1.5
–1.5
–1.5
–1.5
t
ADSP-BF522/523/524/525/526/527
SPICLK
LSB
Max
12.0
8.5
10
LSB VALID
t
HSPID
2 t
2 t
2 t
2 t
2 t
t
SCLK
V
t
t
Min
DSDHI
SCLK
SCLK
SCLK
SCLK
SCLK
t
DDEXT
4
HDS
LSB
1.6
1.6
DSDHI
0
0
0
–1.5
–1.5
–1.5
–1.5
–1.5
–1.5
ADSP-BF523/525/527
= 1.8 V
Max
12.0
t
8.5
SPITDS
10
2 t
2 t
2 t
2 t
2 t
V
t
DDEXT
SCLK
Min
SCLK
SCLK
SCLK
SCLK
SCLK
4
1.6
1.6
0
0
0
–1.5
= 2.5/3.3 V
–1.5
–1.5
–1.5
–1.5
–1.5
Max Unit
10.3 ns
10
8
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns