8-bit MicrocontrollersのトピックSPI to Atmel AT45DB161 flash

SPI to Atmel AT45DB161 flash

donw — Thu, 21 Aug 2008 16:15:21 GMT

In the past , I have done a bit-bashed SPI to atmel flash AT45DB161,
since I could never get the 908GP32's hardware SPI to work with this part.
I think there is a compatibility problem with the way the flash expects the leading bit to be clocked out.
Has anyone implemented the 908's SPI to the AT45DB161 ?

Re: SPI to Atmel AT45DB161 flash

awmark — Fri, 22 Aug 2008 03:23:37 GMT

No, but I've interfaced an S908JM60 to an Atmel 25FS010 Flash part without any problems (hopefully), using the built in SPI and interrupts.

Re: SPI to Atmel AT45DB161 flash

bigmac — Fri, 22 Aug 2008 10:38:27 GMT

Hello,

According to the datasheet for the serial flash device, the data transfer should be compatible with either of the conditions CPOL = 0, CPHA = 0, or alternatively CPOL = 1, CPHA = 1. I assume that you are operating both devices from the same Vdd supply of 3 volts.

Perhaps you might post the SPI communications code you are using, and provide more detail on the nature of the problem you are experiencing.

Regards,

Mac

Re: SPI to Atmel AT45DB161 flash

donw — Mon, 25 Aug 2008 09:49:01 GMT

Thanks BigMac. I will have another attempt at it later..