Freescale Semiconductor MCF5480 - Manual (Page 444)

MCF548x Reference Manual, Rev. 3
17-28 Freescale Semiconductor
Figure 17-28. Longword Write Burst to 8-Bit Port 3-1-1-1 (No Wait States)
Figure 17-29 shows a longword read 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 17-29. Longword Read Burst-Inhibited from 8-Bit Port (No Wait States)
CLK
AD[23:0]
AD[31:24]
R/W
ALE
TA
OE
S0 S1 S2 S2 S2 S2 S3
FBCSn, BE/BWEn
ADDR[23:0]
TSIZ[1:0] 00
TBST
A[31:24] DATA DATA DATA DATA
CLK
AD[23:0]
AD[31:24]
R/W
ALE
TBST
S0 S1 S2 S2 S2 S2 S3
FBCSn, BE/BWEn
DATA
TSIZ[1:0]
TA
S0 S0 S1 S1 S1 S0
A[31:24] DATA A[31:24] A[31:24] A[31:24] DATA DATA DATA
ADDR[23:0]
00 01 01
OE