Ethernet Controller Programming Model
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
25-139
+ 0x00
HFE/LC
8
Huge Frame Enable (written by user)/Late
collision (written by Ethernet controller). When a
collision occurs, the Ethernet controller terminates
the transmission and updates LC.
0
Truncate transmit frame if its length is
greater than the value in the MAC’s
Maximum Frame Length register.
1
Do not truncate the transmit frame.
0
No late collision.
1
A collision occurred after 64 bytes were
sent.
+ 0x00
RL
9
Retransmission Limit
Indicates when a transmission attempt exceeds the
maximum retry limit for sending the message. When
RL is set, the Ethernet controller terminates the
transmission and updates RL.
0
Transmission before maximum retry
limit is hit.
1
The transmitter failed (maximum retry
limit + 1) attempts to successfully send
a message due to repeated collisions.
+ 0x00
RC
10–13
Retry Count
Indicates the number attempts required to transmit a
frame.
If the value in this field is 15, then 15 or more retries
were needed. The Ethernet controller updates RC
after sending the buffer.
0
The frame is sent correctly the first time.
x
More than zero attempts were needed
to send the transmit frame.
+ 0x00
UN
14
Underrun
Indicates when a transmitter underrun condition is
encountered. When this bit is set, the Ethernet
controller terminates the transmission and updates
UN.
0
No underrun encountered (data was
retrieved from external memory in time
to send a complete frame).
1
The Ethernet controller encountered a
transmitter underrun condition while
sending the associated buffer.
+ 0x00
—
15
Reserved. Write to zero for future compatibility.
+0x02
DL
0–15
Data Length
The number of octets the Ethernet controller should
transmit from this BD’s data buffer. The Ethernet
controller never modifies this value.This field must be
greater than zero.
+0x0 4
TXDBPT
0–31
Transmit Data Buffer Pointer
Contains the address of the associated data buffer.
There are no alignment requirements for this
address.
TxBD
32-Byte Transmit Data Buffer Descriptor
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0x00
R
PADCRC
W
I
L
TC
DEF
0
HFE/LC
RL
RC
UN
0
0x02
Data Length (DL)
0x04
Reserved
0x06
Table 25-133. 8-Byte Transmit Data Buffer Descriptor (TxBD) Field Descriptions (Continued)
Offset
Name
Description
Settings
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 ...