Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Fiche De Données
Codes de produits
ATSAM4E-XPRO
1229
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
43.7.6 Transmit Status Register
Name:
GMAC_TSR
Address:
0x40034014
Access: Read/Write
UBR: Used Bit Read
Set when a transmit buffer descriptor is read with its used bit set. Writing a one clears this bit.
COL: Collision Occurred
Set by the assertion of collision. Writing a one clears this bit. When operating in 10/100 mode, this status indicates either a
collision or a late collision.
collision or a late collision.
RLE: Retry Limit Exceeded
Writing a one clears this bit.
TXGO: Transmit Go
Transmit go, if high transmit is active. When using FIFO, this bit represents bit 3 of the Network Control Register. When
using the DMA interface this bit represents the TXGO variable as specified in the transmit buffer description.
using the DMA interface this bit represents the TXGO variable as specified in the transmit buffer description.
TFC: Transmit Frame Corruption Due to AHB Error
Transmit frame corruption due to AHB error. Set if an error occurs while midway through reading transmit frame from the
AHB, including HRESP errors and buffers exhausted mid frame (if the buffers run out during transmission of a frame then
transmission stops, FCS shall be bad and GTXER asserted).
AHB, including HRESP errors and buffers exhausted mid frame (if the buffers run out during transmission of a frame then
transmission stops, FCS shall be bad and GTXER asserted).
Writing a one clears this bit.
TXCOMP: Transmit Complete
Set when a frame has been transmitted. Writing a one clears this bit.
UND: Transmit Underrun
This bit is set if the transmitter was forced to terminate a frame that it had already began transmitting due to further data
being unavailable.
being unavailable.
This bit is set if a transmitter status write back has not completed when another status write back is attempted.
When using the DMA interface configured for internal FIFO mode, this bit is also set when the transmit DMA has written the
SOP data into the FIFO and either the AHB bus was not granted in time for further data, or because an AHB not OK
response was returned, or because a used bit was read.
SOP data into the FIFO and either the AHB bus was not granted in time for further data, or because an AHB not OK
response was returned, or because a used bit was read.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
HRESP
7
6
5
4
3
2
1
0
–
UND
TXCOMP
TFC
TXGO
RLE
COL
UBR