2 - 18
DSP96002 USER’S MANUAL
MOTOROLA
Likewise, when executing the read part of a RMW access, the end_of_sequence signal is deasserted.
This signal is used to give up bus ownership if
—
B
–
G is deasserted during bus transfers. The state ma-
chine which controls the bus handshake is illustrated in Figure 2.9.
The transition arcs are labeled by two letters which denote its source and destination states. The equa-
tions of the transition arcs are described as follows:
XX = ^ext_acc_req
& ^( ^
—
B
–
G &
—
B
–
B )
XY = ext_acc_req
& ^( ^
—
B
–
G &
—
B
–
B )
XZ = ext_acc_req
& ( ^
—
B
–
G &
—
B
–
B )
XW = ^ext_acc_req
& ( ^
—
B
–
G &
—
B
–
B )
YX = ^ext_acc_req
& ^( ^
—
B
–
G &
—
B
–
B )
(note 1)
YY = ext_acc_req
& ^( ^
—
B
–
G &
—
B
–
B )
YZ = ext_acc_req
& ( ^
—
B
–
G &
—
B
–
B )
YW = ^ext_acc_req
& ( ^
—
B
–
G &
—
B
–
B )
(note 1)
ZX = ^ext_acc_req
&
—
B
–
G
ZY = ext_acc_req
&
—
D
—
B
–
G & end_of_sequence
(note 3)
ACTIVE_
MASTER
(Z)
—
B
–
R = 0
—
B
–
A = 0
Figure 2-9. Bus Handshake State Diagram
REQUEST_BUS
(Y)
—
B
–
R = 0
—
B
–
A = 1
PARKING_
MASTER
(W)
—
B
–
R =
—
R
–
H
IDLE
(X)
—
B
–
R =
—
R
–
H
YY
XX
ZZ
WW
(delayed)
ZY
YZ
ZX
XZ
WY
(non-existant)
YX (illegal)
XY
ZW
WZ
WX
XW
(delayed
)
YW (illegal)
Summary of Contents for DSP96002
Page 3: ...1 2 DSP96002 USER S MANUAL MOTOROLA ...
Page 38: ...MOTOROLA DSP96002 USER S MANUAL 3 15 Figure 3 4 Modulo Arithmetic Unit Block Diagram ...
Page 39: ...3 16 DSP96002 USER S MANUAL MOTOROLA ...
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Page 76: ...MOTOROLA DSP96002 USER S MANUAL 5 23 Figure 5 8 Address Modifier Summary ...
Page 86: ...6 10 DSP96002 USER S MANUAL MOTOROLA ...
Page 101: ...MOTOROLA DSP96002 USER S MANUAL 7 15 Figure 7 9 HI Block Diagram One Port ...
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Page 181: ...MOTOROLA DSP96002 USER S MANUAL 10 15 Figure 10 8 Program Address Bus FIFO ...
Page 337: ...MOTOROLA DSP96002 USER S MANUAL A 149 ...
Page 404: ...A 216 DSP96002 USER S MANUAL MOTOROLA PC xxxx D ...
Page 460: ...A 272 DSP96002 USER S MANUAL MOTOROLA SIOP Not affected ...
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Page 519: ...MOTOROLA DSP96002 USER S MANUAL A 331 ...
Page 718: ...MOTOROLA DSP96002 USER S MANUAL B 199 ...
Page 871: ... MOTOROLA INC 1994 MOTOROLA TECHNICAL DATA SEMICONDUCTOR M Addendum ...
Page 888: ...MOTOROLA INDEX 1 INDEX ...
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