Operating Precautions; Reset Source Monitor Flag; Standby Release; Port Direction Setting For Peripheral Function - NEC IE-703242-G1-EM1 Preliminary User's Manual

In-circuit emulator option board

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Chapter 3 Operating Precautions

Be aware of the following operating precautions when using the IE-703242-G1-EM1.

The reset source (reset caused by external reset input or watchdog timer) can not be distinguished by

the RSM register of the clock controller during emulation mode. Oscillation stabilization time is skipped

after a watchdog timer reset during sub watch mode.

The main oscillator of the V850ES/GB1 I/O chip on the emulation board is always running and can not

be switched off. Therefore no oscillation stabilization time is required when stop mode or sub watch

mode of V850ES/GB1 is released. As a consequence of this the V850ES/GB1 I/O chip on the ICE will

wake up immediately from sub watch or stop mode whereas the V850ES/GB1 real chip always assures

the oscillation stabilization time for the main oscillator when standby mode is released.

When a peripheral function is used the direction setting for the respective port bit of the V850ES/GB1

real chip is not set automatically. The port bit direction has to be programmed according to the

requirement of the peripheral function by setting the port mode register. In the FPGA on the emulation

board port mode setting is not necessary when a peripheral function is used. Therefore on the emulator

ports emulated by the FPGA behave different from the real chip. This only affects bit 1 of port PCM,

CLOCKOUT function. Therefore if the CLOCKOUT function is to be used the respective bit positions of

registers PMCM and PMCCM have to be set accordingly.

The usable settings for the BPC register limit usage to the first 32MB of the total address range. There-

fore the programmable peripheral area must be set to an address range within the first 32 MB.

Take note of the differences between the In-Circuit Emulator and the real chip described in

Chapter 4 Differences between Target Device and Emulation Board.

Preliminary User's Manual U16345EE1V0UM00

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