ADSP-21991BST Analog Devices Inc, ADSP-21991BST Datasheet - Page 30

• Manufacturer Part Number: ADSP-21991BST
• Description: IC DSP CONTROLLER 16BIT 176LQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-21991BST

• Rohs Status: RoHS non-compliant
• Interface: SPI, SSP
• Clock Rate: 160MHz
• Non-volatile Memory: External
• On-chip Ram: 112kB
• Voltage - I/o: 3.30V
• Voltage - Core: 2.50V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 176-LQFP

ADSP-21991
TFS (“LATE,” EXT.)
TFS (“LATE,” INT.)
RCLK
TCLK
RFS
TFS
DR
DT
DATA TRANSMIT-INTERNAL CLOCK
TCLK (EXT)
DATA RECEIVE-INTERNAL CLOCK
TCLK (INT)
DT
DRIVE
DRIVE
DT
EDGE
EDGE
t
t
t
HOFSE
HOFSE
HDTI
t
DFSE
DRIVE
t
DRIVE
NOTE: EITHER THE RISING EDGE OR FALLING EDGE OF RCLK OR TCLK CAN BE USED AS THE ACTIVE SAMPLING EDGE.
t
NOTE: EITHER THE RISING EDGE OR FALLING EDGE OF RCLK OR TCLK CAN BE USED AS THE ACTIVE SAMPLING EDGE.
EDGE
EDGE
DDTI
DFSE
t
t
DDTEN
DDTIN
t
t
SCLKIW
SCLKIW
t
t
t
SFSI
SDRI
SFSI
SAMPLE
SAMPLE
EDGE
EDGE
t
t
t
HDRI
HFSI
HFSI
Figure 12. Serial Port
–30–
TCLK/RCLK
TCLK/RCLK
RCLK
TCLK
RFS
TFS
DR
DT
DATA TRANSMIT-EXTERNAL CLOCK
DATA RECEIVE-EXTERNAL CLOCK
DRIVE
EDGE
DRIVE
EDGE
t
DRIVE
DRIVE
t
t
EDGE
EDGE
HOFSE
HOFSE
HDTE
t
t
t
DFSE
DFSE
DDTTI
t
DDTE
t
DDTTE
t
t
SCLKW
SCLKW
t
t
t
SFSE
SDRE
SFSE
SAMPLE
SAMPLE
EDGE
EDGE
t
t
t
HFSE
HDRE
HFSE
REV. 0