TMS320C6678
Multicore Fixed and Floating-Point Digital Signal Processor
SPRS691D—April 2013
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7.21 Gigabit Ethernet (GbE) Switch Subsystem
The Gigabit Ethernet (GbE) switch subsystem provide an efficient interface between the TMS320C6678 DSP and the
networked community. The GbE switch subsystem supports 10Base-T (10 Mbits/second [Mbps]), and 100BaseTX
(100 Mbps), in half- or full-duplex mode, and 1000BaseT (1000 Mbps) in full-duplex mode, with hardware flow
control and quality-of-service (QOS) support. The GbE switch subsystem is coupled with network coprocessor. For
more information, see the Gigabit Ethernet (GbE) Switch Subsystem for KeyStone Devices User Guide in ‘‘Related
Documentation from Texas Instruments’’ on page 73.
Each device has a unique MAC address. There are two registers to hold these values, MACID1 (0x02620110) and
MACID2 (0x02620114). All bits of these registers are defined as follows:
Figure 7-54
MACID1 Register
31
0
MACID[31:0]
R,+xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx
Legend: R = Read only; -x, value is indeterminate
Table 7-79
MACID1 Register Field Descriptions
Bit
Field
MAC ID[31-0]
Description
MAC ID. A range will be assigned to this device. Each device will consume only one MAC address.
31-0
End of Table 7-79
Figure 7-55
MACID2 Register
31
24
23
18
17
FLOW BCAST
R,+z R,+y
16
15
0
Reserved
Reserved
R,+0
MACID[47:32]
R+, xxxx xxxx
R,+xxxx xxxx xxxx xxxx
Legend: R = Read only; -x, value is indeterminate
Table 7-80
MACID2 Register Field Descriptions
Description
Bit
Field
Reserved
31-24
23-18
17
Reserved. Values will vary.
Reserved. Read as 0.
Reserved
FLOW
MAC flow control
0 = Off
1 = On
16
BCAST
Default m/b-cast reception
0 = Broadcast
1 = Disabled
15-0
MAC ID[47-0]
MAC ID
End of Table 7-80
Copyright 2013 Texas Instruments Incorporated
Peripheral Information and Electrical Specifications 223
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