Download SECTION 9 EXTERNAL BUS INTERFACE

32
1
1
2
4
1
ADDR[0:31]
RD/WR
BURST
TSIZ[0:1]
PTR
1
STS (BI)
1
BDIP
1
TS
1
RSV
1
1
32
1
1
1
1
1
1
1
Address
and
Transfer
Attributes
AT[0:3]
KR
CR
Transfer
Start
Reservation
Protocol
DATA[0:31]
Data
RETRY
BI (STS)
TA
TEA
Transfer
Cycle
Termination
BR
BG
Arbitration
BB
Figure 9-2 MPC555 Bus Signals
9.4 Bus Interface Signal Descriptions
Table 5-1 diatribes each signal in the bus interface unit. More detailed descriptions
can be found in subsequent subsections.
MPC555
USER’S MANUAL
EXTERNAL BUS INTERFACE
Rev. 15 Nov 98
MOTOROLA
9-3