Datasheet

Bus Operation
6-60 MCF5206e USER’S MANUAL MOTOROLA
each state of the bus arbitration state machine.
Figure 6-37. MCF5206e Two-Wire Bus Arbitration Protocol State Diagram
Table 6-10. MCF5206e Two-Wire Bus Arbitration Protocol Transition Conditions
PRESENT
STATE
CONDITION
LABEL
RSTI
SOFTWARE
WATCHDOG
RESET
BG
BUS LOCK
BIT
INTERNAL
BUS REQUEST
TRANSFER IN
PROGRESS
END OF
CYCLE
NEXT STATE
RESET
A1 A - - - - - - Reset
A2 N A - - - - - Reset
A3 N N N - - - - EM Own
A4 N N A - - - - Implicit Own
IMPLICIT OWN
B1 N N N - - - - EM Own
B2 N N A A - - - Explicit Own
B3 N N A N N - - Implicit Own
B4 N N A N A - - Explicit Own
EXPLICIT OWN
C1 N N A - - - - Explicit Own
C2 N N N A - - - Explicit Own
C3 N N N N - N - EM Own
C4 N N N - - A N Explicit Own
C5 N N N N - A A EM Own
AM OWN
D1 N N N - - - - EM Own
D2 N N A A - - - Explicit Own
D3 N N A N N - - Implicit Own
D4 N N A N A - - Explictit Own
RESET
IMPLICIT
OWN
EXPLICIT
OWN
EM
OWN
A1
A2
A3
A4
C3
C1
C2
C5
C4
B2
B1
B4
D2
D4
D3
B3
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