DM8203
2-port switch with MII / RMII Interface
8.12 (Specified config) Register – 14H
Bit
15
14
13
Bit Name
TSTSE1
TSTSE2
Default
0,RW
0,RW
0,RW
Description
Vendor test select 1 control
Vendor test select 2 control
Force Signal Detect
FORCE_TXSD
1: force SD signal OK in 100BASE-TX mode
0: normal SD signal.
12
11
FORCE_FEF
PREAMBLEX
0,RW
0,RW
Vendor test select control
Preamble Saving Control
0: when bit 10 is set, the 10BASE-T transmit preamble count is
reduced. When bit 11 of register 1DH is set, 12-bit preamble is
reduced; otherwise 22-bit preamble is reduced.
1: transmit preamble bit count is normal in 10BASE-T mode
10BASE-T mode Transmit Power Saving Control
1: enable transmit power saving in 10BASE-T mode
0: disable transmit power saving in 10BASE-T mode
Auto-negotiation Power Saving Control
10
9
TX10M_PWR
NWAY_PWR
1,RW
0,RW
0, RO
1: disable power saving during auto-negotiation period
0: enable power saving during auto-negotiation period
8
7
Reserved
Reserved
Read as 0, ignore on write
MDIX_CNTL
MDI/MDIX,RO The polarity of MDI/MDIX value
1: MDIX mode
0: MDI mode
6
5
4
AutoNeg_dpbk
Mdix_fix Value
Mdix_down
0,RW
0, RW
0,RW
Auto-negotiation Loopback
1: test internal digital auto-negotiation Loopback
0: normal.
MDIX_CNTL force value:
When Mdix_down = 1, MDIX_CNTL value depend on the register
value.
MDIX Down
Manual force MDI/MDIX.
0: Enable HP Auto-MDIX
1: Disable HP Auto-MDIX ,
MDIX_CNTL value depend on Reg.14H.bit5
Vendor monitor select 1
Vendor monitor select 0
Reserved
3
2
1
MonSel1
MonSel0
Reserved
0,RW
0,RW
0,RW
Force to 0, in application.
Power down control value
Decision the value of each field Reg.13H.
1: power down
0
PD_value
0,RW
0: normal
Preliminarydatasheet
DM8203-15-DS-P05
October 23, 2008
41
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
