adsp-21991 Analog Devices, Inc., adsp-21991 Datasheet - Page 34

• Manufacturer Part Number: adsp-21991
• Description: Mixed Signal Dsp Controller
• Manufacturer: Analog Devices, Inc.

ADSP-21991
JTAG Test And Emulation Port Timing
Table 14
Table 14. JTAG Port Timing
1
2
3
Parameter
Timing Requirements
t
t
t
t
t
t
Switching Characteristics
t
t
System Outputs = DATA15–0, ADDR21–0, MS3–0, RD, WR, ACK, CLKOUT, BG, PF15–0, DT, TCLK, RCLK, TFS, RFS, BMS.
50 MHz maximum.
System Inputs = DATA15–0, ADDR21–0, RD, WR, ACK, BR, BG, PF15–0, DR, TCLK, RCLK, TFS, RFS, CLKOUT, RESET.
TCK
STAP
HTAP
SSYS
HSYS
TRSTW
DTDO
DSYS
and
OUTPUTS
SYSTEM
SYSTEM
Figure 17
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 Pulsewidth
TDO Delay from TCK Low
System Outputs Delay After TCK Low
TMS
TDO
TCK
TDI
describe JTAG port operations.
2
t
DTDO
t
t
DSYS
STAP
Figure 17. JTAG Port Timing
t
TCK
1
1
3
t
HTAP
–34–
t
SSYS
Min
20
4t
0
t
HSYS
TCK
Max
4
4
4
5
8
22
REV. 0
Unit
ns
ns
ns
ns
ns
ns
ns
ns