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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.

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