ADSP-21992YST Analog Devices Inc, ADSP-21992YST Datasheet - Page 47

• Manufacturer Part Number: ADSP-21992YST
• Description: IC DSP CONTROLLER 16BIT 176LQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-21992YST

• Rohs Status: RoHS non-compliant
• Interface: SPI, SSP
• Clock Rate: 160MHz
• Non-volatile Memory: External
• On-chip Ram: 128kB
• Voltage - I/o: 3.30V
• Voltage - Core: 2.50V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 176-LQFP

Serial Peripheral Interface Port—Slave Timing
Table 25
Table 25. Serial Peripheral Interface (SPI) Port—Slave Timing
Parameter
Timing Requirements
t
t
t
t
t
t
t
t
Switching Characteristics
t
t
t
t
SPICHS
SPICLS
SPICLK
HDS
SPITDS
SDSCI
SSPID
HSPID
DSOE
DSDHI
DDSPID
HDSPID
and
Figure 17
Serial Clock High Period
Serial Clock Low Period
Serial Clock Period
Last SPICLK Edge to SPISS Not Asserted
Sequential Transfer Delay
Data Input Valid to SCLK Edge (Data Input Setup)
SCLK Sampling Edge to Data Input Invalid (Data In Hold)
SCLK Edge to Data Out Valid (Data Out Delay)
SCLK Edge to Data Out Invalid (Data Out Hold)
SPISS Assertion to First SPICLK Edge
SPISS Assertion to Data Out Active
SPISS Deassertion to Data High Impedance
describe SPI port slave operations.
Rev. A | Page 47 of 60 | August 2007
Min
2t
2t
4t
2t
2t
2t
1.6
2.4
0
0
0
0
HCLK
HCLK
HCLK
HCLK
HCLK
HCLK
+ 4
Max
8
10
10
10
ADSP-21992
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns