Le ven 04/10/2002 ? 09:55, Gagneraud Christian a ?crit : > > 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]
Forget this question, i found the information that i need: =>[...]Thes pins are used in external master configuration[..] So For my design, i don't care about baddr[], so i have to connect MPC A[27..29] to flash A[2..0] > > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
