
21-30
MPC860 PowerQUICC UserÕs Manual
MOTOROLA
Part V. The Communications Processor Module
Figure 21-26. IDL Bus Signals
Note that previous versions of Motorola IDL-deÞned bit functions called auxiliary (A) and
maintenance (M) were removed from the IDL deÞnition when it was concluded that the
IDL control channel would be out-of-band. These functions were deÞned as a subset of the
Motorola SPI format called serial control port (SCP). To implement the A and M bits as
originally deÞned, program the TSA to access these bits and route them transparently to an
SCC or SMC. Use the SPI to perform out-of-band signaling.
The MPC860 supports all channels of the IDL bus in the basic rate. Each bit in the IDL
frame can be routed to any SCC and SMC or they can assert a strobe output that supports
an external device.
The MPC860 supports the request-grant method for contention detection on the D channel
of the IDL basic rate and when the MPC860 has data to send on the D channel, it asserts
L1RQx. The physical layer device monitors the physical layer bus for activity on the D
channel and indicates that the channel is free by asserting L1GRx. The MPC860 samples
L1GRx when the IDL sync signal (L1RSYNCx) is asserted. If L1GRx is asserted, the
MPC860 sends the Þrst zero of the opening ßag in the Þrst bit of the D channel. If a collision
is detected on the D channel, the physical layer device negates L1GRx. The MPC860 then
stops its transmission and resends the frame when L1GRx is reasserted. This procedure is
handled automatically for the Þrst two buffers of a frame.
L1CLK
L1SYNC
L1RXD
L1TXD
B1
D1
10-Bit IDL
D2
B1
D1
B2
D2
L1CLK
L1SYNC
L1RXD
L1TXD
B1
D1
8-Bit IDL
D2
B1
B2
D2
B2
D1
B2
Notes
:
1. Clocks are not to scale.
2. LIRQ
x
and L1GR
x
are not shown.
Содержание MPC860 PowerQUICC
Страница 3: ...MPC860UM AD 07 98 REV 1 MPC860 PowerQUICC ª UserÕs Manual ...
Страница 36: ...xxxvi MPC860 PowerQUICC UserÕs Manual MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Страница 78: ...I iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Страница 88: ...1 10 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Страница 114: ...3 16 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
Страница 226: ...8 32 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Страница 262: ...9 36 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Страница 274: ...III iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part III Configuration ...
Страница 320: ...12 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part III Configuration ...
Страница 325: ...MOTOROLA Part IV Hardware Interface IV v Part IV Hardware Interface ...
Страница 326: ...IV vi MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 352: ...13 26 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 394: ...14 42 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 426: ...15 32 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 530: ...17 26 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
Страница 632: ...21 44 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 660: ...22 28 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 708: ...24 24 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 748: ...27 20 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 846: ...31 20 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 914: ...35 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 948: ...36 34 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
Страница 998: ...37 48 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part VI Debug and Test ...
Страница 1016: ...A 10 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Страница 1024: ...B 8 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Страница 1030: ...C 6 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Страница 1086: ...Glossary 12 MPC860 PowerQUICC UserÕs Manual MOTOROLA ...
Страница 1106: ......