TM4C129XKCZAD Datasheet, PDF (1745/2188 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C129XKCZAD Microcontroller
Register 54: Ethernet MAC Receive Poll Demand (EMACRXPOLLD), offset
0xC08
The Ethernet MAC Receive Poll Demand (EMACRXPOLLD) register enables the RX DMA to
check for new descriptors. This command is used to wake up the RX DMA from the SUSPEND
state. The RX DMA can go into the SUSPEND state only because of the unavailability of descriptors
it owns.
Ethernet MAC Receive Poll Demand (EMACRXPOLLD)
Base 0x400E.C000
Offset 0xC08
Type WO, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
RPD
Type WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RPD
Type WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
WO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:0
Name
RPD
Type
WO
Reset
0x0
Description
Receive Poll Demand
When these bits are written with any value, the DMA reads the current
descriptor pointed to by MAC Current Host Receive Descriptor
(EMACHOSRXDESC) register. If that descriptor is not available (owned
by the Host), the reception returns to the SUSPEND state and the RU
bit of EMACDMARIS is not asserted. If the descriptor is available, the
RX DMA returns to the active state.
June 18, 2014
Texas Instruments-Production Data
1745