how to use the pin EXTAL and XTAL of HCS08DZ60

[maoer]

Hi,

I'm a new comer of FS's HCS08 seriers MCU and I entercounter a problem of how to use the pin of EXTAL and XTAL.

My questions is:

I want to use an external clock signal as the clock input of HCS08DZ60, the clock signal will be connected to the pin EXTAL, So I want to know how to process the pin XTAL, is it should be connected directely to GND or just floated?

Hope can get help from you.

[peg]

Hello and welcome to the fora, maoer.

You connect your oscillator to EXTAL and leave XTAL unconnected.

[bigmac]

Hello,

The datasheet for the 'DZ60 is a little vague on this issue.  It is implied that the MCGC2_EREFS bit must be set to 1 for using a crystal (i.e. requiring both EXTAL and XTAL pin allocations).  However, with the control bit set to 0 (the default value), and suitable for use with an external oscillator, it is possible that the XTAL pin may be available as a GPIO pin (PTG1).

This is true for some of the other HCS08 devices, but for the DZ60 it seems not explicitly mentioned.

Regards,

Mac