Hi all, Still now i use an mpc8260ads baord with Linux 2.4.4 from denx.de, the 8260ADS board have 8Mbytes/32bits of flash organize as 4 chip 8bits wise each. (on a flash SIMM: 4*(sharp 28f016) = 4*[2M*8bits] = 8MBytes in 1 bank)
But now i have to make my own board. I want to have 32MBytes/64bits of flash organize as 4 chip 16bits wise each. ( 4*[Fujitsu MBM29LV650] = 4*[4M*16bits] = 32Mbytes, this chip is supported by linux-mtd). My first question is about Chip Selects and Write Enable lines: - On ADS, the 4 flash chips CS signals are connected to MPC8260 CS0 (GPCM machine is use), and the 4 flash chips WE lines are conected to the 4 bottom MPC8260 byte-WriteEnable signals. - On my design i want to use 16 bits flash but they have only one WE signal per device, is it possible to connect the 4 word-WriteEnable lines to the MPC8260 byte-WriteEnable? My second question (maybe related to the first) is about the MPC8260 Burst addresses lines (baddr[27..31]) - On ADS baddr[27..29] are connected to the A[2..0] of the flash chips. Why are the MPC8260 baddr[27..29] connected to the flash ans why not the MPC8260 A[27..29] ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
