Evaluation Board Manual
Preliminary
PPC750FX Evaluation Board
750FXebm_ch4.fm
June 10, 2003
Programming the System Controller
Page 35 of 115
4.2.4 Device Bank 3 Parameters (FRAM)
Table 4-5. Device Bank 3 Parameters = 0x8D891445
Field
Value (bin)
Comment
TurnOff
101
Number of Sysclk cycles that the system controller does not drive the
address/data bus after completion of a device read
Acc2First
1000
Number of Sysclk cycles from the de-assertion of ALE to the cycle that the
first read data is sampled
Acc2Next
010
Number of Sysclk cycles in a burst read access between the cycle that
samples data N to the cycle that samples data N+1
ALE2Wr
010
Number of Sysclk cycles from ALE de-assertion to the assertion of Wr[0]
WrLow
100
Number of Sysclk cycles that Wr[0] is active
WrHigh
100
Number of Sysclk cycles between data beats of a burst write that Wr[0] is
held in-active. BAdr and data are held valid for WrHigh-1 cycles
DevWidth
00
Device width of 8 bits
TurnOffExt
0
TurnOff extension (most significant bit)
Acc2FirstExt
1
Acc2First extension (most significant bit)
Acc2NextExt
1
Acc2Next extension (most significant bit)
ALE2WrExt
0
ALE2Wr extension (most significant bit)
WrLowExt
1
WrLow extension (most significant bit)
WrHighExt
1
WrHigh extension (most significant bit)
BadrSkew
00
Number of Sysclk cycles from when BAdr changes to the read of the data
DPEn
0
Parity Disabled
Reserved
1
