ADSP-21990BST Analog Devices Inc, ADSP-21990BST Datasheet - Page 39

• Manufacturer Part Number: ADSP-21990BST
• Description: IC DSP CONTROLLER 16BIT 176LQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

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

JTAG Test And Emulation Port Timing
Table 15
Table 15. JTAG Port Timing
1
2
3
Parameter
Timing Requirements
t
t
t
t
t
t
Switching Characteristics
t
t
System inputs = DATA15–0, ADDR21–0, RD, WR, ACK, BR, BG, PF15–0, DR, TCLK, RCLK, TFS, RFS, CLKIN, RESET.
50 MHz maximum.
System outputs = DATA15–0, ADDR21–0, MS3–0, RD, WR, ACK, CLKOUT, BG, PF15–0, DT, TCLK0, TCLK, RCLK, TFS, RFS, BMS.
TCK
STAP
HTAP
SSYS
HSYS
TRSTW
DTDO
DSYS
and
OUTPUTS
Figure 18
SYSTEM
SYSTEM
INPUTS
TCK Period
TDI, TMS Setup Before TCK High
TDI, TMS Hold After TCK High
System Inputs Setup Before TCK Low
System Inputs Hold After TCK Low
TRST Pulse Width
TDO Delay from TCK Low
System Outputs Delay After TCK Low
TCK
TMS
TDO
TDI
describe JTAG port operations.
2
t
DTDO
t
t
DSYS
STAP
1
Rev. A | Page 39 of 50 | August 2007
1
3
t
TCK
Figure 18. JTAG Port Timing
t
HTAP
t
SSYS
t
Min
20
4t
0
HSYS
TCK
Max
4
4
5
8
22
4
ADSP-21990
Unit
ns
ns
ns
ns
ns
ns
ns
ns