mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 565

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

24.4.6.4 Timing Variations
The Mini-FlexBus module has several features that can change the timing characteristics
of a basic read- or write-bus cycle to provide additional address setup, address hold, and
time for a device to provide or latch data.
24.4.6.4.1 Wait States
Wait states can be inserted before each beat of a transfer by programming the CSCRn
registers. Wait states can give the peripheral or memory more time to return read data or
sample write data.
The following figures show the basic read and write bus cycles (also shown in
24-15
Freescale Semiconductor, Inc.
and
Figure
FB_CLK
FB_A[Y]
FB_D[X]
FB_RW
FB_TS
FB_ALE
FB_CSn
FB_OEn
FB_BE/BWEn
FB_TA
FB_TSIZ[1:0]
24-20) with the default of no wait states respectively.
Figure 24-21. Single Word-Write Transfer
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Address
Preliminary
Address
TSIZ=10
AA=0
AA=1
Data
AA=0
AA=1
Chapter 24 External Bus Interface (Mini-FlexBus)
Figure
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