Specifications

ASIX ELECTRONICS CORPORATION
25
AX88772
USB to 10/100 Fast Ethernet/HomePNA Controller
6.2.1.18 Medium Status Register (1Ah, read only) and Medium Mode Register (1Bh, write only)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
PF 0 TFC RFC 0 1 FD 0
Reserved SM SBP Reserved PS RE
AA [7:0] = {PF, JFE, TFC, RFC, EN125, AC, FD, GM}.
BB [7:0] = {Reserved, SM, SBP, JE, PS, RE}.
Bit 0: Please always write 0 to this bit.
PS: Port Speed in MII mode
1: 100 Mbps (default).
0: 10 Mbps.
FD: Full Duplex mode
1: Full Duplex mode (default).
0: Half Duplex mode.
Bit 2: Please always write 1 to this bit.
Bit 3: Please always write 0 to this bit.
RFC: RX Flow Control enable.
1: Enable receiving of pause frame on RX direction during full duplex mode (default).
0: Disabled.
TFC: TX Flow Control enable.
1: Enable transmitting pause frame on TX direction during full duplex mode (default).
0: Disabled.
Bit 6: Please always write 0 to this bit.
PF: Check only “length/type” field for Pause Frame.
1: Enable, i.e., Pause frames are identified only based on L/T filed.
0: Disabled, i.e., Pause frames are identified based on both DA and L/T fields (default).
RE: Receive Enable.
1: Enable RX path of the ASIC.
0: Disabled (default).
SBP: Stop Backpressure.
1: When TFC bit = 1, setting this bit enables backpressure on TX direction “continuously” during RX buffer full
condition in half duplex mode.
0: When TFC bit = 1, setting this bit enable backpressure on TX direction “intermittently” during RX buffer full
condition in half duplex mode (default).
SM: Super Mac support.
1: Enable Super Mac to shorten exponential back-off time during transmit retry.
0: Disabled (default).
6.2.1.19 Monitor Mode Status Register (1Ch, read only)
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Reserved US Reserved RWMP RWLU MOM
MOM: Monitor Mode.
1: Enable. All received packets will be checked on DA and CRC but not buffered into memory.
0: Disabled (default).
RWLU: Remote Wakeup trigger by Ethernet Link-up.
1: Enable
0: Disabled (default).
RWMP: Remote Wakeup trigger by Magic Packet.
1: Enable
0: Disabled (default).
US: USB Speed.
1: High speed mode.
0: FS speed mode.