IBM PPC750FX, User Manual

Page: 34 / 116

Evaluation Board Manual
PPC750FX Evaluation Board
Preliminary
Programming the System Controller
Page 34 of 115
750FXebm_ch4.fm
June 10, 2003
4.2.3 Device Bank 2 Parameters (UARTs)
Table 4-4. Device Bank 2 Parameters = 0x8C002BD6
Field Value (bin) Comment
TurnOff 110
Number of Sysclk cycles that the system controller does not drive the
address/data bus after completion of a device read
Acc2First 1010
Number of Sysclk cycles from the de-assertion of ALE to the cycle that the
first read data is sampled
Acc2Next 0111
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 101 Number of Sysclk cycles from ALE de-assertion to the assertion of Wr[0]
WrLow 000 Number of Sysclk cycles that Wr[0] is active
WrHigh 000
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 0 Acc2First extension (most significant bit)
Acc2NextExt 0 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