ADSP-21990BST Analog Devices Inc, ADSP-21990BST Datasheet - Page 37
ADSP-21990BST
Manufacturer Part Number
ADSP-21990BST
Description
IC DSP CONTROLLER 16BIT 176LQFP
Manufacturer
Analog Devices Inc
Series
ADSP-21xxr
Type
Fixed Pointr
Datasheet
1.ADSP-21990BSTZ.pdf
(50 pages)
Specifications of ADSP-21990BST
Rohs Status
RoHS non-compliant
Interface
SPI, SSP
Clock Rate
160MHz
Non-volatile Memory
External
On-chip Ram
20kB
Voltage - I/o
3.30V
Voltage - Core
2.50V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
176-LQFP
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ADSP-21990BSTZ
Manufacturer:
Analog Devices Inc
Quantity:
10 000
Serial Peripheral Interface Port—Master Timing
Table 13
Table 13. Serial Peripheral Interface (SPI) Port—Master Timing
Parameter
Timing Requirements
t
t
Switching Characteristics
t
t
t
t
t
t
t
t
SSPID
HSPID
SDSCIM
SPICHM
SPICLM
SPICLK
HDSM
SPITDM
DDSPID
HDSPID
and
CPHA = 1
CPHA = 0
Figure 16
(CPOL = 1)
(CPOL = 0)
(OUTPUT)
(OUTPUT)
(OUTPUT)
(OUTPUT)
(OUTPUT)
(INPUT)
Data Input Valid to SCLK Edge (Data Input Setup)
SCLK Sampling Edge to Data Input Invalid (Data In Hold)
SPISEL Low to First SCLK Edge
Serial Clock High Period
Serial Clock Low Period
Serial Clock Period
Last SCLK Edge to SPISEL High
Sequential Transfer Delay
SCLK Edge to Data Output Valid (Data Out Delay)
SCLK Edge to Data Output Invalid (Data Out Hold)
SPISEL
(INPUT)
SCLK
SCLK
MISO
MISO
MOSI
MOSI
describe SPI port master operations.
t
SSPID
t
SDSCIM
t
SPICLM
t
VALID
SSPID
MSB
t
Figure 16. Serial Peripheral Interface (SPI) Port—Master Timing
SPICHM
MSB
VALID
MSB
t
HSPID
t
SPICLM
t
MSB
DDSPID
Rev. A | Page 37 of 50 | August 2007
t
HSPID
t
DDSPID
t
SPICHM
t
HDSPID
VALID
t
t
LSB
SPICLK
SSPID
t
HDSPID
VALID
LSB
LSB
Min
8
1
2t
2t
2t
4t
2t
2t
0
0
HCLK
HCLK
HCLK
HCLK
HCLK
HCLK
t
HDSM
– 3
– 3
– 3
– 1
– 3
– 2
LSB
t
HSPID
t
SPITDM
Max
6
5
ADSP-21990
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns