Renesas QB-78K0KX1H-DA User Manual page 45

Restriction on using the self-check board (1.0)
• There is a communication problem due to a bug in the microcontroller mounted on the self-check board when
the QB-78K0MINI operates on the Ring-OSC. The debugger takes a measure to avoid this problem by
forcibly switching to the main clock when a break occurs, and re-switches to the Ring-OSC when the
program is executed. Consequently, the QB-78K0MINI always operates on the main clock during a break.
• A fail-safe break (Uninitialize Stack Pointer; a break that occurs due to a failure to perform stack pointer
initialization) occurs when an internal reset is generated due to a bug in the microcontroller mounted on the
self-check board.
[Workaround]
Stop the watchdog timer operation or repeat starting the count operation to suppress generation of the
internal reset by the watchdog timer.
Note The part number is shown as "QB-78K01H-TB X.X" on the label attached to the device mounted on the self-
check board. "X.X" indicates the version.
CHAPTER 5 RESTRICTIONS
Note
for operation check.
User's Manual U17029EJ3V0UM
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