Ethernet Controller Programming Model
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
25-61
DMAMR
DMA Maintenance Register
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
—
PCNT
—
DOOS
—
APR
BDPR
Type
R
R/W
R
R/W
R/W
R/W
R/W
R
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
Boot
0
0
0
0
0
0
0
0
0
1
0
0
1
1
0
1
Bit
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
—
Type
R
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Boot
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 25-25. DMAMR Field Descriptions
Bit
Reset
Description
Settings
—
1–3
0
Reserved. Always write a 0 to this bit after any reset or configuration.
PCNT
4–5
0
Polling Count
This field sets the polling frequency of the transmitter. The
polling frequency is proportional to the Ethernet MII clock
speed (2.5, 25 MHz)
00 512 clocks
01 256 clocks
10 128 clocks
11 64 clocks
—
6
0
Reserved. Always write a 0 to this bit after any reset or configuration.
DOOS
7
0
Disable Out-of-Sequence Buffer Descriptor
0
Out-of-Sequence buffer
descriptor polling is enabled
1
Out-of-Sequence buffer
descriptor polling is disabled
—
8
0
Reserved. Always write a 0 to this bit after any reset or configuration.
—
9
0
Reserved. Always write a 1 to this bit after any reset or reconfiguration.
—
10–11
0
Reserved. Always write a 0 to this bit after any reset or configuration.
APR
12–13
11
Alarm Mode Priority
Sets the transmit/receive transaction priority if the Ethernet
controller is in alarm mode. In alarm mode (used to help
prevent potential underrun/overrun conditions), both reads and
writes of TxBDs/RxBDs have a priority set to the APR value.
00 Low priority
01 Mid priority
10 Mid priority
11 High priority
BDPR
14–15
01
Buffer Descriptor Fetches Priority prior to Alarm Mode
Sets the transmit/receive transaction priority.
00 Low priority
01 Mid priority
10 Mid priority
11 High priority
—
16–31
0
Reserved. Always write a 0 to this bit after any reset or configuration.
Содержание MSC8113
Страница 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Страница 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
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Страница 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Страница 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Страница 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Страница 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Страница 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Страница 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Страница 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Страница 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Страница 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Страница 544: ...MSC8113 Reference Manual Rev 0 16 46 Freescale Semiconductor Direct Memory Access DMA Controller ...
Страница 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Страница 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Страница 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Страница 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Страница 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Страница 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Страница 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Страница 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...