DMA Transfer Programming
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
16-31
The round-robin operation continues from one channel to the next in sequence for all 16
channels, regardless of the source and destination. Figure 16-25 shows the round-robin flow for
either of the buses. There are two parallel flows, one for each bus.The variable N represents the
channels numbers.
The hand skips a channel in the following cases:
— The channel is non-active.
— The channel is not requesting service when the hand selects the channel.
— The channel is not associated with the specific bus, that is, if a channel is associated
with the system bus, the local bus round robin clock always skips that channel.
If a channel requests service, but the hand already passed it in the current round, it is
served during the next round.
Figure 16-24. Round-Robin Clock Examples
Figure 16-25. Round-Robin Flow Diagram
0
8
4
12
13
14
15
1
3
2
5
6
7
9
10
11
0
8
4
12
13
14
15
1
3
2
5
6
7
9
10
11
Local Bus Clock
System Bus Clock
RESET
N=0
Serve Channel N
No
Skip
Channel N
?
Yes
N=N+1
N=N mod 16
Summary of Contents for MSC8113
Page 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Page 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
Page 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
Page 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Page 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Page 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Page 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Page 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Page 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Page 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Page 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Page 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Page 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Page 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Page 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Page 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Page 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Page 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Page 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Page 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...