QB-RL78L1C In-Circuit Emulator CHAPTER 4 CAUTIONS
R20UT2703EJ0200 Rev.2.00
Page 32 of 42
Jan 31, 2014
CHAPTER 4 CAUTIONS
4.1 Cautions Regarding Differences Between Target Device and QB-RL78L1C
When debugging is performed by connecting the QB-RL78L1C to the target system, the QB-RL78L1C emulates the
target device as if it operates in the target system. However, the target device and the QB-RL78L1C 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-RL78L1C.
- On-chip debug function
The on-chip debug function cannot be emulated.
- Oscillator
The QB-RL78L1C 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-RL78L1C is connected.
- Pin characteristics
The pin characteristics of the QB-RL78L1C 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-RL78L1C and the target
system. In particular, note that the A/D converter conversion results are commonly-affected.
- Current consumption
The current consumption of the QB-RL78L1C differs from that of the target device.
The maximum current consumption is around 180 mA. In the same manner, the current consumption in standby
mode also differs from that of the target device.
- A/D conversion error around 0[V] and 5.5[V]
A/D conversion error around 0[V] and 5.5[V] on QB-RL78L1C is large.
When A/D input voltage is 0.1[V] and lower or 5.36[V] and higher, use on-chip debugger or actual equipment.
