30 mac status register (macstatus), Section 5.30 – Texas Instruments TMS320C674X User Manual
Page 112
EMAC Module Registers
www.ti.com
5.30 MAC Status Register (MACSTATUS)
The MAC status register (MACSTATUS) is shown in
and described in
Figure 68. MAC Status Register (MACSTATUS)
31
30
24
23
20
19
18
16
IDLE
Reserved
TXERRCODE
Rsvd
TXERRCH
R-0
R-0
R-0
R-0
R-0
15
12
11
10
8
RXERRCODE
Reserved
RXERRCH
R-0
R-0
R-0
7
3
2
1
0
Reserved
RXQOSACT
RXFLOWACT
TXFLOWACT
R-0
R-0
R-0
R-0
LEGEND: R = Read only; -n = value after reset
Table 67. MAC Status Register (MACSTATUS) Field Descriptions
Bit
Field
Value
Description
31
IDLE
EMAC idle bit. This bit is cleared to 0 at reset; one clock after reset, it goes to 1.
0
The EMAC is not idle.
1
The EMAC is in the idle state.
30-24
Reserved
0
Reserved
23-20
TXERRCODE
0-Fh
Transmit host error code. These bits indicate that EMAC detected transmit DMA related host errors.
The host should read this field after a host error interrupt (HOSTPEND) to determine the error. Host
error interrupts require hardware reset in order to recover. A 0 packet length is an error, but it is not
detected.
0
No error
1h
SOP error; the buffer is the first buffer in a packet, but the SOP bit is not set in software.
2h
Ownership bit not set in SOP buffer
3h
Zero next buffer descriptor pointer without EOP
4h
Zero buffer pointer
5h
Zero buffer length
6h
Packet length error (sum of buffers is less than packet length)
7h-Fh
Reserved
19
Reserved
0
Reserved
18-16
TXERRCH
0-7h
Transmit host error channel. These bits indicate which transmit channel the host error occurred on.
This field is cleared to 0 on a host read.
0
The host error occurred on transmit channel 0
1h
The host error occurred on transmit channel 1
2h
The host error occurred on transmit channel 2
3h
The host error occurred on transmit channel 3
4h
The host error occurred on transmit channel 4
5h
The host error occurred on transmit channel 5
6h
The host error occurred on transmit channel 6
7h
The host error occurred on transmit channel 7
112
EMAC/MDIO Module
SPRUFL5B – April 2011
© 2011, Texas Instruments Incorporated