AX88780_07 ASIX [ASIX Electronics Corporation], AX88780_07 Datasheet - Page 34

• Manufacturer Part Number: AX88780_07
• Description: High-Performance Non-PCI Single-Chip 32-bit 10/100M Fast Ethernet Controller
• Manufacturer: ASIX [ASIX Electronics Corporation]

5.0 PHY Register
in-directed mechanism. For write operation, software firstly sets data to MDIODP register, then sets index and write enable
bit to MDIOCTRL register. AX88780 will access PHY by internal interface and clear the write enable bit whenever the
operation finished. For read operation, driver sets the index and read enable bit to MDIOCTRL register, then polls the
read-enable bit. The returned data will be put in MDIODP register whenever the read-enable bit is cleared.
Index
0x00
0x01
0x02
0x03
0x04
0x05
0x06
The following abbreviations apply to below sections for detained register description.
Access type
R = read only
RW= read/write
Attribute:
LL = latch low
LH = latch high
SC = Self-clearing
PS = Value is permanently set
X = don’t care
5.1 BMCR--Basic Mode Control Register
Index = 0x00
Field
15
14
13
12
11
10
9
8
AX88780 is built a high performance 10/100M PHY for cost-effective. Driver can access these registers of PHY by
PHYRST
SPDSEL
Name
LOOPBACK
AUTONEG_EN RW
PHYPWDN
AUTONEG_RS R/W
DPLX
Name
BMCR
BMSR
PHYIDR0
PHYIDR1
ANAR
ANLPAR
ANER
-
Type
R/W
R/W
R/W
R/W
R
R/W
Description
Basic Mode Control Register
Basic Mode Status Register
PHY Identifier 0 Register
PHY Identifier 1 Register
Auto-negotiation Advertisement Register
Auto-negotiation Link Partner Ability Register
Auto-negotiation Expansion Register
Default
0, SC
0
1
1
0
0
0
1
Table 9 : PHY Register Mapping
Soft reset:
1 = software reset PHY, this bit will be cleared when reset finish.
0 = normal operation
Loop back operation:
1 = Loop back enable
0 = Loop back disable
Speed selection:
1 = 100Mb/s
0 = 10Mb/s
Auto-negotiation enable:
1 = enable, bit8 and bit13 will be ignored when this bit is enabled.
0 = disable, bit8 and bit13 of this register determine the link speed and
mode.
Power down:
1 = power-down enable
0 = normal operation
Reserved
Auto-negotiation restart:
1=Restart auto-negotiation, this bit will be cleared when finish negotiation.
0=normal operation
Duplex mode:
34
ASIX ELECTRONICS CORPORATION
Description
AX88780