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Bus Operation
7-64 M68060 USER’S MANUAL MOTOROLA
Figure 7-42. MC68060-Arbitration Protocol State Diagram
AM
IMPLICIT
AM
EXPLICIT
SNOOP
IMPLICIT
OWN
F3
E4
E5
E6
F2
F1
E3
E2
E1
D5
D4
EXPLICIT
OWN
END
TENURE
RESET
A1
B1
B2
B3
B4
A3
A2
D3
D1
C1
C3
C2
D2
G1
D
BTT
BTTI
QBR
BTTO
BTTO THREE-STATE
IBR
BCLK
IBR
BR
BTTI
BTTO
BTT
BCLK
= INTERNAL BUS REQUEST SIGNAL
= EXTERNAL BUS REQUEST PIN
= INTERNAL BTT SAMPLED AS INPUT
= BTT DRIVEN INTERNALLY BY MC68060
= EXTERNAL BTT PIN
= VIRTUAL BUS CLOCK DERIVED FROM CLK AND CLKEN
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