DM8603EP DAVICOM [Davicom Semiconductor, Inc.], DM8603EP Datasheet - Page 16

• Manufacturer Part Number: DM8603EP
• Description: 10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

6.2 Basic Mode Control Register (040h, 060h)
Preliminary datasheet
DM8603-12-DS-P01
November 8, 2010
PHY_ADR
02h, 03h
Bit
15
14
13
12
11
10
9
8
Auto-negotiation
Auto-negotiation
Speed selection
Duplex mode
Power down
Bit Name
Loopback
Restart
enable
Isolate
Reset
REG_ADR
00h
Default
RW/SC
RW/SC
RW
RW
RW
RW
RW
RW
0b
0b
1b
1b
0b
0b
0b
1b
10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
Reset
This bit sets the status and controls the PHY registers to their default
states. This bit, which is self-clearing, will keep returning a value of
one until the reset process is completed
Loopback
Loop-back control register. When in 100Mbps operation mode,
setting this bit may cause the descrambler to lose synchronization
and produce a 720ms "dead time" before any valid data appears at
the MII receive outputs
Speed Select
Link speed may be selected either by this bit or by auto-negotiation.
When auto-negotiation is enabled and bit 12 is set, this bit will return
auto-negotiation selected medium type
Auto-negotiation Enable
Power Down
While in the power-down state, the PHY should respond to
management transactions. During the transition to power-down state
and while in the power-down state, the PHY should not generate
spurious signals on the MII
Isolate
Force to 0 in application.
Restart Auto-negotiation
Re-initiates the auto-negotiation process. When auto-negotiation is
disabled (bit 12 of this register cleared), this bit has no function and it
should be cleared. This bit is self-clearing and it will keep returning to
a value of 1 until auto-negotiation is initiated by the DM8603. The
operation of the auto-negotiation process will not be affected by the
management entity that clears this bit
Duplex Mode
Duplex selection is allowed when Auto-negotiation is disabled (bit 12
of this register is cleared). With auto-negotiation enabled, this bit
reflects the duplex capability selected by auto-negotiation
1 = Software reset
0 = Normal operation
1 = Loop-back enabled
0 = Normal operation
1 = 100Mbps
0 = 10Mbps
1 = Auto-negotiation is enabled, bit 8 and 13 will be in
0 = Auto-negotiation is disabled.
1 = Power down
0 = Normal operation
1 = Restart auto-negotiation.
0 = Normal operation
1 = Full duplex operation.
0 = Normal operation
auto-negotiation status
ABS_ADR
040, 060h
Description
DM8603
16