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QB-V850MINIL, QB-V850MINI Emulator
3.4.3
Connecting the FLMD0 signal (for V850E2S or V850E2M)
FLMD0 is the signal used to switch the system to flash programming mode. Control the status of FLMD0 on
QB-V850MINIL or QB-V850MINI as follows in accordance with the status of the debugger.
Table 3-2. Status of FLMD0 Signal on QB-V850MINIL or QB-V850MINI
During
a break
While the user-created program is executing
Terminated
FLMD0
Handle the FLMD0 signal as shown in either (a) or (b) below. Whether the FLMD0 signal needs to be connected or not
depends on the specifications of the target device.
（ a） When not performing flash self programming
Connect the FLMD0 signal output from QB-V850MINIL or QB-V850MINI to the FLMD0 pin on the target
device.
As long as there are no problems arising from the specifications of the target device, pull the signal down to low
level. Determine the resistance value of the pull-down resistor by referring to the user's manual of the target
device.
3.3 V
Figure 3-7. Example Connection of FLMD0 Pin When Used by QB-V850MINIL or QB-V850MINI
R20UT0221EJ0400 Rev.4.00
2013.08.30
Debugger Status
When writing to the flash memory
When not writing to the flash memory
Note When downloading a program or when writing in the Assemble or Memory window.
Hi-Z
Figure 3-6. Timing of FLMD0 on QB-V850MINIL or QB-V850MINI
QB-V850MINIL/
QB-V850MINI
74LVC1T45
FLMD0
DIR
Note
High-level (CMOS output)
High impedance
When rewriting the flash memory
during a break
High level
Target system
V
DD
3. On-Chip Debugging
Status of FLMD0
Hi-Z
Target device
FLMD0
Page 35 of 86
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