External Bus Interface (EBI)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
29-36
Freescale Semiconductor
Preliminary
Figure 29-25. Burst 32-bit Read Cycle, One Wait State Between Beats, TBDIP = 0
When using TBDIP = 1, the BDIP behavior changes to toggle between every beat when BSCY is a
non-zero value.
shows an example of the TBDIP = 1 timing for the same four-beat burst
shown in
.
Figure 29-26. Burst 32-bit Read Cycle, One Wait State Between Beats, TBDIP = 1
29.4.2.6
Small Accesses (Small Port Size and Short Burst Length)
In this context, a small access refers to an access whose burst length and port size are such that the number
of bytes requested by the internal master cannot all be fetched (or written) in one external transaction. This
DATA is valid
Wait state
Wait state
CLKOUT
ADDR[8:31]
BDIP
DATA[0:31]
TA
RD_
WR
TS
OE
CSn
Expects more data
ADDR[29:31] = ‘000’
Wait state
Wait state
DATA is valid
Wait state
Wait state
CLKOUT
ADDR[8:31]
BDIP
DATA[0:31]
TA
RD_
WR
TS
OE
CSn
Expects more data
ADDR[29:31] = ‘000’
Wait state
Wait state