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QB-RL78L12 In-Circuit Emulator
4.1 Cautions Regarding Differences Between Target Device and Emulator
When debugging is performed by connecting the QB-RL78L12 to the target system, the QB-RL78L12 emulates the
target device as if it operates in the target system. However, the target device and the QB-RL78L12 operate differently
in the following ways. Consequently, the target device should be used for final evaluation before launching mass
production, and the customer is to be responsible for judging the appropriateness of applying the QB-RL78L12.
- On-chip debug function
The on-chip debug function cannot be emulated.
- Oscillator
The QB-RL78L12 does not support clock input by an oscillator in the target system. Consequently, the operation
clock frequency when the target device is mounted in the target system may differ from the operation clock
frequency when the QB-RL78L12 is connected.
- Pin characteristics
The pin characteristics of the QB-RL78L12 slightly differ when the target device is mounted to the target system,
because a connector, adapter, emulation probe, and circuit board exist between the QB-RL78L12 and the target
system. In particular, note that the A/D converter conversion results are commonly-affected.
- Current consumption
he current consumption of the QB-RL78L12 differs from that of the target device.
T
The current consumption may reach up to 250 mA.
The same amount of current is consumed in standby mode.
- Change the positive reference voltage on the A/D converter
When change the positive reference voltage, after setting ADREFP1 and ADREFP0,
emulator is different from that of the target device.
ADM2 register ( value after change )
ADREFP1
R20UT2080EJ0100 Rev.1.00
2013.03.18
CHAPTER 4 CAUTIONS
Table 4-1 Target devices and stabilization wait time of IECUBE
ADREFP0
1
0
0
0
0
1
CHAPTER 4 CAUTIONS
stabilization wait time
Target devices
IECUBE
1μs
400μs
No
400μs
No
400μs
stabilization wait time of
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