VSC8601 Datasheet
Configuration
Table 46.
RGMII Skew Control, Address 28E (0x1C) (continued)
Bit
Name
Access Description
Default
8:0
Reserved
RO
4.3.13
Ethernet Packet Generator (EPG) Control 1
The EPG control register provides access to and control of various aspects of the EPG
testing feature. There are two, separate EPG control registers. The following table lists
the setting available in the first register.
Table 47.
EPG Control Register 1, Address 29E (0x1D)
Bit
15
14
13
Name
Access Description
Default
EPG enable
EPG run or stop
R/W
R/W
R/W
1 = Enable EPG
1 = Run EPG
0
0
0
Transmission
duration
1 = Continuous (sends in 10,000-packet
increments)
0 = Send 30,000,000 packets and stop
12:11
Packet length
R/W
00 = 125 bytes
0
01 = 64 bytes
10 = 1518 bytes
11 = 10,000 bytes (Jumbo packet)
10
9:6
5:2
1
Inter-packet gap
Destination address
Source address
Payload type
R/W
R/W
R/W
R/W
R/W
1 = 8,192 ns
0 = 96 ns
0
0001
0000
0
Lowest nibble of the six-byte destination
address
Lowest nibble of the six-byte destination
address
1 = Randomly generated payload pattern
0 = Fixed based on payload pattern
0
Bad frame check
sequence (FCS)
generation
1 = Generate packets with bad FCS
0 = Generate packets with good FCS
0
The following information applies to the EPG control number 1:
•
•
Do not run the EPG when the VSC8601 device is connected to a live network.
Bit 29E.13 (Continuous EPG mode control): When enabled, this mode causes the
device to send continuous packets. When disabled, the device continues to send
packets only until it reaches the next 10,000-packet increment mark. It then
ceases to send packets.
•
•
•
The six-byte destination address in bits 9:6 is assigned one of 16 addresses in the
range of 0xFF FF FF FF FF F0 through 0xFF FF FF FF FF FF.
The six-byte source address in bits 5:2 is assigned one of 16 addresses in the range
of 0xFF FF FF FF FF F0 through 0xFF FF FF FF FF FF.
If any of bits 13:0 are changed while the EPG is running (bit 14 is set to 1), bit 14
must be cleared and then set back to 1 for the change to take effect and to restart
the EPG.
Revision 4.1
September 2009
Page 63
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
