JTAG, Master Serial Mode

C

Chao

Guest
Hello,

I have one general question concerning the FPGA supported
configuration mode. I am using Xilinx ISE iMpact to program Spartan-3.
I use the JTAG Cable-IV to download the bitstream to the Spartan-3.
Meanwhile I set up the configuration jumper on board to JTAG mode
(i.e. M0,M1,M2=0,1,0). That works fine. But if I set up the jumper to
MASTER-SERIAL (i.e. M0,M1,M2=1,1,1) mode, I can still download the
bitstream to the Spartan-3 via JTAG cable. I expected that I can
download the bitstream via JTAG cable only under JTAG mode jumper set
on board. Does the jumper on board have nothing to do with the iMpact
"software" based configuration mode set?

Thanks in advance for your explanation.

Chao.
 
Xilinx went to great efforts to write it, so read the bloody datasheet!
Quote:-
"Configuration through the boundary-scan port is always available,
independent of the mode selection. Selecting the Boundary-Scan mode simply
turns off the other modes."
Syms.

"Chao" <c.chen@gmx.de> wrote in message
news:8228a344.0404270556.23004f45@posting.google.com...
Hello,

I have one general question concerning the FPGA supported
configuration mode. I am using Xilinx ISE iMpact to program Spartan-3.
I use the JTAG Cable-IV to download the bitstream to the Spartan-3.
Meanwhile I set up the configuration jumper on board to JTAG mode
(i.e. M0,M1,M2=0,1,0). That works fine. But if I set up the jumper to
MASTER-SERIAL (i.e. M0,M1,M2=1,1,1) mode, I can still download the
bitstream to the Spartan-3 via JTAG cable. I expected that I can
download the bitstream via JTAG cable only under JTAG mode jumper set
on board. Does the jumper on board have nothing to do with the iMpact
"software" based configuration mode set?

Thanks in advance for your explanation.

Chao.
Click to expand...
 
jtag mode has the highest priority
"Symon" <symon_brewer@hotmail.com> Đ´ČëÓĘźţ
news:c6m0rm$dneba$1@ID-212844.news.uni-berlin.de...
Xilinx went to great efforts to write it, so read the bloody datasheet!
Quote:-
"Configuration through the boundary-scan port is always available,
independent of the mode selection. Selecting the Boundary-Scan mode simply
turns off the other modes."
Syms.

"Chao" <c.chen@gmx.de> wrote in message
news:8228a344.0404270556.23004f45@posting.google.com...
Hello,

I have one general question concerning the FPGA supported
configuration mode. I am using Xilinx ISE iMpact to program Spartan-3.
I use the JTAG Cable-IV to download the bitstream to the Spartan-3.
Meanwhile I set up the configuration jumper on board to JTAG mode
(i.e. M0,M1,M2=0,1,0). That works fine. But if I set up the jumper to
MASTER-SERIAL (i.e. M0,M1,M2=1,1,1) mode, I can still download the
bitstream to the Spartan-3 via JTAG cable. I expected that I can
download the bitstream via JTAG cable only under JTAG mode jumper set
on board. Does the jumper on board have nothing to do with the iMpact
"software" based configuration mode set?

Thanks in advance for your explanation.

Chao.
Click to expand...
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top