NXP Semiconductors LPC24XX UM10237 - Manual (Page 228)

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User manual Rev. 04 — 26 August 2009 228 of 792
NXP Semiconductors
UM10237
Chapter 11: LPC24XX Ethernet
The station address is used for perfect address filtering and for sending pause control
frames. For the ordering of the octets in the packet please refer to
Figure 11–27 .
7.1.17 Station Address 2 Register (SA2 - 0xFFE0 0048)
The Station Address 2 register (SA2) has an address of 0xFFE0 0048. The bit definition of
this register is shown in
Table 11–205 .
The station address is used for perfect address filtering and for sending pause control
frames. For the ordering of the octets in the packet please refer to
Figure 11–27 .
7.2 Control register definitions
7.2.1 Command Register (Command - 0xFFE0 0100)
The Command register (Command) register has an address of 0xFFE0 0100. Its bit
definition is shown in
Table 11–206 .
Table 204. Station Address register (SA1 - address 0xFFE0 0044) bit description
Bit Symbol Function Reset
value
7:0 STATION ADDRESS,
4th octet This field holds the fourth octet of the station address. 0x0
15:8 STATION ADDRESS,
3rd octet This field holds the third octet of the station address. 0x0
31:16 - Unused 0x0
Table 205. Station Address register (SA2 - address 0xFFE0 0048) bit description
Bit Symbol Function Reset
value
7:0 STATION ADDRESS,
6th octet This field holds the sixth octet of the station address. 0x0
15:8 STATION ADDRESS,
5th octet This field holds the fifth octet of the station address. 0x0
31:16 - Unused 0x0
Table 206. Command register (Command - address 0xFFE0 0100) bit description
Bit Symbol Function Reset
value
0 RxEnable Enable receive. 0
1 TxEnable Enable transmit. 0
2 - Unused 0x0
3 RegReset When a ’1’ is written, all datapaths and the host registers are
reset. The MAC needs to be reset separately. 0
4 TxReset When a ’1’ is written, the transmit datapath is reset. 0
5 RxReset When a ’1’ is written, the receive datapath is reset. 0
6 PassRuntFrame When set to ’1’, passes runt frames smaller than 64 bytes to
memory unless they have a CRC error. If ’0’ runt frames are
filtered out. 0
7 PassRxFilter When set to ’1’, disables receive filtering i.e. all frames
received are written to memory. 0