mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 456

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

General Operation of External Master Transfers
Table 18-10 describes the two-wire bus arbitration protocol transition conditions.
18-28
External
Present
Table 18-10. MCF5407 Two-Wire Bus Arbitration Protocol Transition Conditions
Implicit
Explicit
Master
Master
Master
Reset
State
Figure 18-29. MCF5407 Two-Wire Bus Arbitration Protocol State Diagram
Condition
Label
A1
A2
A3
A4
B1
B2
B3
B4
C1
C2
C3
C4
C5
D1
D2
D3
D4
D1
RSTI
A
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
2
3
External
Master
Software Watchdog
C3
C5
A3
Reset
MCF5407 User’s Manual
—
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
A
D2
D4
Explicit
Master
Reset
B1
D3
BG
—
—
N
A
N
A
A
A
A
N
N
N
N
N
A
A
A
A1
A2
C1
C2
C4
Request
Bus
—
—
—
—
—
—
—
—
—
—
—
—
—
N
A
N
A
B2
B4
A4
Implicit
Master
Transfer in
Progress
—
—
—
—
—
—
—
—
—
—
—
—
—
—
N
A
A
B3
End of
Cycle
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
N
A
1
Implicit mas
Explicit mas
Implicit mas
Explicit mas
Explicit mas
Explicit mas
Explicit mas
Explicit mas
Implicit mas
Explicit mas
EM mas
State
Next
Reset
Reset
EM
EM
EM
EM
4