Motorola MVME2300 Series - Manual (Page 52)

1-28 Computer Group Literature Center Web Site
Board Description and Memory Maps
1
M_SPD[0:1]
Memory Speed. This field relays the memory speed
information as follows:
These two bits reflect the combined status of the four
blocks of DRAM. Initialization software uses this
information to program the ram_spd0 and ram_spd1
control bits in the Falcon’s Chip Revision register.
R_A/B_TYP[0:2]
ROM/Flash Type. This field is encoded as follows:
Note The device width differs from the width of the Flash bank. If the
bank width is 64 bits and the device width is 16 bits, then the
Flash bank consists of four Flash devices.
L2_TYPE[0:3]
L2 Memory Type. This field is encoded as follows:
M_SPD[0:1] DRAM Speed DRAM Type
0B00 70ns Past Page
0B01 60ns Fast Page
0B10 Reserved Reserved
0B11 50ns EDO
ROM_A/B_TYP[0:2] ROM/Flash Type
0B000 to 0B101 Reserved
0B110 Intel 16-bit wide Flash with 16K Bottom Boot
Block
0B111 Unknown type (i.e. ROM/Flash sockets)
L2_TYPE[0:3] Configuration
0B0000 Late write Sync
0B0001 Pipelined Sync Burst
0B0010 to 0B1111 Reserved