FR60 FAMILY EMA-MB91FV460B-001 - Fujitsu

8 Troubleshooting
EMA-MB91FV460B-001
Chapter 8 Troubleshooting
1a. The programming adapter is connected to the EMA-MB91FV460B-001 and I
checked the jumper configuration and the settings in FME FR Programmer but
whatever I do, it is not working.
1b. Sometimes the programming is not working, the FME FR Programmer can not
establish a connection
Apply some pressure at the connector during the whole programming process. Try different
directions. There might be a loose contact.
2. Sometimes when I try to stop a running program with the button in Softune
Workbench there seems to be a time-out and Softune Workbench does not respond
for a while.
If you are running on CLKB frequencies higher than 80MHz you could try the following:
Close Softune Workbench, then start the debug session again. Do not start the program but
go to the following menu:
“Setup” – “Debug environment” – “Debug Environment…”:
Choose the “Frequency” tab and insert the value: D’133
As a result this will decrease the debug interface clock frequency to achieve a more stable
communication.
3. When EMA-MB91FV460B-001 is connected to a target board the debug session can
not be started and a “MCU busy” error message is shown. The mode pins (MD[2:0])
are controlled by this target board.
On EMA-MB91FV460B-001 the FPGA is responsible for controlling the mode pins of
MB91FV460B-001. There are 2 sets of mode pin inputs to the FPGA, one from the target
board and the other one from the on-board DIP switches. These FPGA inputs have internal
pull-up resistors and additionally there are series resistors to protect the FPGA pins. If then
pull-down resistors are used on the target board to configure the mode pins it can happen
that the low level is not recognized because of the voltage divider.
Ensure that when you are using pull-down resistors for the mode pins on the target board,
their value is equal to or smaller than 2150 Ω.
4. When trying to start a debug session a “MCU busy” error message is shown.
Please control your mode pin settings at DIP switches S100_[1:4]. Also ensure that the DIP
switches are conducting if set to “ON”. Try to set the switches to the other position and back
to the original position, maybe there was a bad contact.
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