MCF5307, little help

angelo_d — Thu, 29 Oct 2020 08:53:43 GMT

Hi all,

i am debugging a prototype with MCF5307 and a 16x2 Flash memory.

The flash is connected to CS0, *WE, *OE, etc. but no read operation from the flash is working.

This is the CS0 configuration:

/**
 * ChipSelect 0 - FLASH  */ MCF_CS0_CSAR = BASEADDR_FLASH>>16;  MCF_CS0_CSCR = 0  | MCF_CS_CSCR_WS(6)  | MCF_CS_CSCR_AA  | MCF_CS_CSCR_PS_16;  MCF_CS0_CSMR = MCF_CS_CSMR_BAM_4M | MCF_CS_CSMR_V;

As a first test, i try to read the part ID from the flash, but i don't get anything different data than 0xffff.

So i started to look at signals with the scope, with this test loop:

volatile unsigned short *baseaddress = (volatile unsigned short *)BASEADDR_FLASH;while(1)   *(baseaddress + 0x555) = (unsigned short)0xAA;

In this simple loop, CS0 is correctly driven up and down at every write, but *WE remain high.

Every help is really appreciated,

many thanks,

Angelo

Re: MCF5307, little help

angelo_d — Wed, 04 Nov 2009 00:48:02 GMT

sorry, was wrong, the signal was correct, problem was on my bad code.

regards,

Angelo

topic Re: MCF5307, little help in ColdFire/68K Microcontrollers and Processors

MCF5307, little help

Re: MCF5307, little help