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ADSP-21990BBC Datasheet(PDF) 39 Page - Analog Devices

No. de pieza ADSP-21990BBC
Descripción Electrónicos  Mixed-Signal DSP Controller
PDF  50 Pages
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

ADSP-21990BBC Datasheet(HTML) 39 Page - Analog Devices

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ADSP-21990
Rev. A
|
Page 39 of 50
|
August 2007
JTAG Test And Emulation Port Timing
Table 15 and Figure 18 describe JTAG port operations.
Table 15. JTAG Port Timing
Parameter
Min
Max
Unit
Timing Requirements
tTCK
TCK Period
20
ns
tSTAP
TDI, TMS Setup Before TCK High
4
ns
tHTAP
TDI, TMS Hold After TCK High
4
ns
tSSYS
System Inputs Setup Before TCK Low1
4ns
tHSYS
System Inputs Hold After TCK Low1
5ns
tTRSTW
TRST Pulse Width
2
4tTCK
ns
Switching Characteristics
tDTDO
TDO Delay from TCK Low
8
ns
tDSYS
System Outputs Delay After TCK Low3
022
ns
1 System inputs = DATA15–0, ADDR21–0, RD, WR, ACK, BR, BG, PF15–0, DR, TCLK, RCLK, TFS, RFS, CLKIN, RESET.
2 50 MHz maximum.
3 System outputs = DATA15–0, ADDR21–0, MS3–0, RD, WR, ACK, CLKOUT, BG, PF15–0, DT, TCLK0, TCLK, RCLK, TFS, RFS, BMS.
Figure 18. JTAG Port Timing
TMS
TDI
TDO
SYSTEM
INPUTS
SYSTEM
OUTPUTS
TCK
tTCK
tHTAP
tSTAP
tDTDO
tSSYS
tHSYS
tDSYS



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