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Lattice Semiconductor
Functional Description
Internal Registers
The TSMAC IP core internal registers are initialized through the generic Host Interface. These rules apply when
accessing the internal registers:
? With the 8-bit Host Interface, the individual bytes of the registers are accessed through their corresponding
addresses, with the lower address pointing to the lower byte.
? The reserved bits should be programmed to 0. These bits are invalid, and should be discarded when read.
? All registers except the MODE and GMII Management registers can be written into only when the core is dis-
abled, i.e., MAC is in the IDLE state (Tx_en and Rx_en low in the MODE register). The MODE and GMII Man-
agement registers are the only registers that can be written to after the TSMAC IP core is no longer disabled.
Table 2-4 lists the TSMAC IP core registers accessible via the Host Interface. The registers are either Read/Write
(R/W) or Read Only (RO) for status reporting purposes. The values of the registers immediately after the Reset
Condition is removed from the TSMAC IP core (POR Value in Hexadecimal format) are also given.
Table 2-4. TSMAC IP Core Internal Registers
Register Description
Mode register
Transmit and Receive Control register
Maximum Packet Size register
Inter-Packet Gap register
TSMAC IP core Address register 0
TSMAC IP core Address register 1
TSMAC IP core Address register 2
Transmit and Receive Status
GMII Management Interface Control register
GMII Management Data register
VLAN Tag Length/type register
Multicast_table_0
Multicast_table_1
Multicast_table_2
Multicast_table_3
Multicast_table_4
Multicast_table_5
Multicast_table_6
Multicast_table_7
Pause_opcode
Mnemonic
MODE
TX_RX_CTL
MAX_PKT_SIZE
IPG_VAL
MAC_ADDR_0
MAC_ADDR_1
MAC_ADDR_2
TX_RX_STS
GMII_MNG_CTL
GMII_MNG_DAT
VLAN_TAG
MLT_TAB_0
MLT_TAB_1
MLT_TAB_2
MLT_TAB_3
MLT_TAB_4
MLT_TAB_5
MLT_TAB_6
MLT_TAB_7
PAUS_OP
I/O Address
00H - 01H
02H - 03H
04H - 05H
08H - 09H
0AH - 0BH
0CH - 0DH
0EH - 0FH
12H - 13H
14H - 15H
16H - 17H
32H - 33H
22H - 23H
24H - 25H
26H - 27H
28H - 29H
2AH - 2BH
2CH - 2DH
2EH - 2FH
30H - 31H
34H - 35H
POR Value
0000H
0000H
05EEH
000CH
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0000H
0080H
IPUG51_03.0, December 2010
25
Tri-Speed Ethernet MAC User’s Guide
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相关代理商/技术参数
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