Freescale Semiconductor MCF5480 - Manual (Page 445)

Functional Description
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor 17-29
Figure 17-30 shows a longword write through an 8-bit device with burst inhibited. The transfer results in
four individual transfers. Notice that the transfer size is driven at longword (2’b00) during the first transfer
and at byte (2’b01) during the next three transfers.
Figure 17-30. Longword Write Burst-Inhibited to 8-Bit Port (No Wait States)
Figure 17-31 illustrates another read burst transfer, but in this case a wait state is added between individual
beats.
Figure 17-31. Longword Read Burst from 8-Bit Port 4-2-2-2 (One Wait State)
CLK
AD[23:0]
AD[31:24]
R/W
ALE
TBST
S0 S1 S2 S2 S2 S2 S3
FBCSn, BE/BWEn
TSIZ[1:0]
TA
S0 S0 S1 S1 S1 S0
ADDR[23:0]
00 01 01
OE
A[31:24] A[31:24] DATA A[31:24] DATA A[31:24] DATA DATA
CLK
AD[ 23:0]
AD[31:24]
R/W
ALE
TA
OE
S0 S1 WS S2 WS/SWS S2 WS/SWS S2 WS/SWS S2 S3
FBCSn, BE/BWEn
ADDR[23:0]
A[31:24] DATA DATA DATA DATA
TSIZ[1:0] 00
TBST