On 17.01.2008 02:48, Ward Vandewege wrote: > Hi Ronald, > > On Thu, Jan 17, 2008 at 12:13:48AM +0100, Ronald Hoogenboom wrote: > >> Problem1 (for reading) is solved by NOT using the mmap method for >> reading the flash contents, but using outb() for sending the flash read >> commands (using a specific 25vf016 read function). Also the normal read >> command is only supported up to 25MHz by this chip, so I cannot use the >> 33MHz speed as used normally by spi.c. There is also a 'high speed' read >> command (0x0b), which inserts an extra dummy byte between address and >> data, but as the 8716 only allows max. 3 bytes read per io transfer, the >> gain (3 bytes per io transfer @ 16MHz versus 2 bytes per io transfer @ >> 33MHz) is negligible. >> > > Can you elaborate a bit about that - I see the two read speeds in the > datasheet, but how do you get to 16MHz in that last sentence? >
33 MHz /2 (at least that's how the IT8716F datasheet calls it. Regards, Carl-Daniel -- coreboot mailing list [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
