3DK38124 Renesas Electronics America, 3DK38124 Datasheet

3DK38124

Manufacturer Part Number

3DK38124

Description

DEV EVALUATION KIT H8/38124

Manufacturer

Renesas Electronics America

Series

H8®r

Type

MCUr

Datasheets

1.3DK38124.pdf (2 pages)

2.3DK38124.pdf (13 pages)

3.3DK38124.pdf (4 pages)

4.3DK38124.pdf (4 pages)

Specifications of 3DK38124

Contents

3-D Board, Jumper Link, Header Connectors and CD-ROM

For Use With/related Products

H8/38124

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

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3DK38124 -

This document details deviations to the actual performance of the EDK product from that shown in the

documentation supplied on this CD. These deviations are due to the behaviour of the Hardware Break Controller in

H8/38124 devices, and the fact that HMON does not support interrupts with higher priorities than the serial port.

Hardware Break Controller

Interrupt Priority

Tutorial Software

Renesas Technology Europe Ltd

The hardware break controller for the H8/38124 devices only functions in BOOT mode. It is therefore necessary to return

the device to BOOT mode every time the board is reset using the RES switch when debugging. After a successful BOOT

mode download, FDT can be placed in User mode; however, when prompted to reset the board it must be reset into

BOOT mode. FDT User mode flash programming can then be performed until the power is cycled on the board.

The hardware break also occurs one instruction after the break point. Therefore if a breakpoint is set to the beginning of

main() as described in section 5.5 of the Tutorial Manual and Reset Go is pressed then the main function will be opened

and the cursor will be set to point to the start of the main function.

Because HMON does not work reliably when interrupts of a higher priority than the serial port are used, do not use

interrupts other that the ADC interrupt.

Section 5.5.2

Because of the above limitation only the ADC interrupt is used in the tutorial software provided with the 3DK38124.

Therefore the Timer and A/D test behaves in a different way in the tutorial software. Section 5.5.2 of the Tutorial Manual

can be largely ignored.

Instead the function Timer_AD sets up ADC interrupts. As these occur periodically, they are used to decrement a

variable, adccount. When this reaches zero, the value read from the ADC is used as the new adccount value.

In this way changing the potentiometer changes the frequency of the LEDs.

The last two paragraphs of 5.5.2 still apply.

Section 5.5.6

This function is replaced by SubCLK_Test(), which polls TimerA, the RTC timer, rather than use interrupts.

It counts on the LEDs in 1s intervals.

void SubCLK_Test(void)

{

}

This uses the function PollTimer():

PutStr("\n\nSub-clock test in progress...\n");

PutStr("Sub-clock test complete.\n");

count = 0x07;

#ifdef Release

#endif

// Count on the LEDs at 1 second intervals using the Timer

while (count != 0)

{

}

#ifdef Release

#endif

PollTimer();

LED_PORT_DR = ~count;

Limitations of Use

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D005617_11_v01

Related parts for 3DK38124

3DK38124 Summary of contents

Page 1

... Tutorial Software Section 5.5.2 Because of the above limitation only the ADC interrupt is used in the tutorial software provided with the 3DK38124. Therefore the Timer and A/D test behaves in a different way in the tutorial software. Section 5.5.2 of the Tutorial Manual can be largely ignored. ...

Page 2

... Limitations of Use void PollTimer(void Poll the interrupt request bit*/ while ( IRR1.BIT.IRRTA == CLEAR) { nop(); } count--; IRR1.BIT.IRRTA = CLEAR; } This function waits in a loop until the interrupt request flag becomes true, decrements the counter, and clears the flag. Note that interrupts are nor enabled. ...

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