UM10211 - Standard ICs

NXP Semiconductors
UM10211
Chapter 11: LPC2300 Ethernet
Table 152. Station Address register (SA2 - address 0xFFE0 0048) bit description
Bit Symbol Function Reset
value
7:0 STATION ADDRESS, This field holds the sixth octet of the station address. 0x0
6th octet
15:8 STATION ADDRESS, This field holds the fifth octet of the station address. 0x0
5th octet
31:16 - Unused 0x0
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 11–19.
11. Control register definitions
11.1 Command Register (Command - 0xFFE0 0100)
The Command register (Command) register has an address of 0xFFE0 0100. Its bit
definition is shown in Table 11–153.
Table 153. 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 0
reset. The MAC needs to be reset separately.
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 0
received are written to memory.
8 TxFlowControl Enable IEEE 802.3 / clause 31 flow control sending pause 0
frames in full duplex and continuous preamble in half duplex.
9 RMII When set to ’1’, RMII mode is selected; if ’0’, MII mode is 0
selected.
10 FullDuplex When set to ’1’, indicates full duplex operation. 0
31:11 - Unused 0x0
All bits can be written and read. The Tx/RxReset bits are write only, reading will return a 0.
11.2 Status Register (Status - 0xFFE0 0104)
The Status register (Status) is a Read Only register with an address of 0xFFE0 0104. Its
bit definition is shown in Table 11–154.
UM10211_1
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User manual Rev. 01 — 27 March 2007 150 of 613