MOTOROLA
Chapter 21. Serial Interface
21-17
Part V. The Communications Processor Module
Table 21-4 describes the SIGMR Þelds.
Note that after setting SIGMR[ENx], data from the transmit buffers does not immediately
appear at the TDM transmit pin with the Þrst frame because the SCCs require start-up
clocking at initialization. Expect a number of bytes of idle (typically 10Ð15) depending on
the size of the frame and number of time slots routed to the particular SCC.
21.2.4.2 SI Mode Register (SIMODE)
The SI mode register (SIMODE), shown in Figure 21-13, deÞnes the SI operation modes
for the TDM channels and SMCs.
Bit
0
1
2
3
4
5
6
7
Field
Ñ
ENb
ENa
RDM
Reset
0
R/W
R/W
Addr
0xAE4
Figure 21-12. SI Global Mode Register (SIGMR)
Table 21-4. SIGMR Field Descriptions
Bits Name
Description
0Ð3
Ñ
Reserved, should be cleared.
4
ENb
Enable TDMb.
0 TDMb is disabled. SI RAM and TDM routing are in a state of reset; all other SI functions still operate.
1 TDMb is enabled.
5
ENa
Enable TDMa.
0 TDMa is disabled. SI RAM and TDM routing are in a state of reset; all other SI functions still operate.
1 TDMa is enabled.
6Ð7
RDM
RAM division mode. DeÞnes the SI RAM partitioning based on the number of TDM channels supported
and whether dynamic changes are needed.
00 Static TDMa with 64 entries apiece for Rx and Tx routing. (TDMb cannot be used.)
01 Dynamic TDMa with 32 entries apiece for current-route and shadow Rx routing and 32 apiece for
current-route and shadow Tx routing. (TDMb cannot be used.)
10 Static TDMa and TDMb with 32 entries apiece for the Rx routing and 32 apiece for Tx routing.
11 Dynamic TDMa and TDMb with 16 entries apiece for current-route and shadow Rx routing and 16
apiece for current-route and shadow Tx routing.
Summary of Contents for MPC860 PowerQUICC
Page 3: ...MPC860UM AD 07 98 REV 1 MPC860 PowerQUICC ª UserÕs Manual ...
Page 36: ...xxxvi MPC860 PowerQUICC UserÕs Manual MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Page 78: ...I iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part I Overview ...
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Page 226: ...8 32 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Page 262: ...9 36 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part II PowerPC Microprocessor Module ...
Page 274: ...III iv MPC860 PowerQUICC UserÕs Manual MOTOROLA Part III Configuration ...
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Page 325: ...MOTOROLA Part IV Hardware Interface IV v Part IV Hardware Interface ...
Page 326: ...IV vi MPC860 PowerQUICC UserÕs Manual MOTOROLA Part IV Hardware Interface ...
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Page 632: ...21 44 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part V The Communications Processor Module ...
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Page 998: ...37 48 MPC860 PowerQUICC UserÕs Manual MOTOROLA Part VI Debug and Test ...
Page 1016: ...A 10 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
Page 1024: ...B 8 MPC860 PowerQUICC UserÕs Manual MOTOROLA Appendixes ...
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