topic Re: Supply voltage for read operation in 8-bit Microcontrollers

Supply voltage for read operation

rob — Tue, 04 Oct 2016 06:25:12 GMT

I'm using an MC9S08LC60 HCS08 family device. I found the following specification about supply voltage for read operation:

0 < Fbus < 8MHz ---- Vread 1,8 to 3,6V

0 < Fbus < 20MHz ---- Vread 2,08 to 3,6V

Where is the difference? If I use an 8Mhz external resonator to obtain an internal 2Mhz bus clock which voltage range must I consider?

Thank you

vicentegomez — Mon, 10 Oct 2016 18:01:52 GMT

Hi Roberto

Let me put it in other words.

The minimum voltage level that you need to read the flash at 8 MHz of bus clock is 1.8 V

The minimum voltage level that you need to read the flash at 20 MHz of bus clock is 2.08 V

I hope this will help you.

Regards

Vicente Gomez