dm9000b Davicom Semiconductor, Inc., dm9000b Datasheet - Page 37

• Manufacturer Part Number: dm9000b
• Description: Ethernet Controller With General Processor Interface
• Manufacturer: Davicom Semiconductor, Inc.

8.13 DSP Control Register (PSCR) – 27
8.14 Power Saving Control Register (PSCR) – 29
Final
Version: DM9000B-13-DS-F02
June 4, 2009
29.15-12
27.15-0
29.8-0
29.10
29.11
20.4
20.3
20.2
20.1
20.0
29.9
Bit
Bit
PREAMBLEX
AMPLITUDE
RESERVED
RESERVED
Mdix_down
Reserved
PD_value
Bit Name
Bit Name
TX_PWR
MonSel1
MonSel0
DSP
Default
Default
0,RW
0,RW
0,RW
0,RW
0,RW
0,RW
0,RW
0,RW
0.RW
0,RO
0,RO
HP Auto-MDIX Down
Manual force MDI/MDIX.
1: Disable HP Auto-MDIX , MDIX_CNTL value depend on 20.5
0: Enable HP Auto-MDIX
Vendor monitor select
Vendor monitor select
Reserved
Force to 0, in application.
Power down control value
Decision the value of each field Register 19.
1: power down
0: normal
DSP Control (for internal testing only)
RESERVED
Preamble Saving Control
when both bit 10and 11 of register 14H are set, the 10BASE-T
transmit preamble count is reduced.
1: 12-bit preamble is reduced.
0: 22-bit preamble is reduced.
Transmit Amplitude Control Disabled
1: when cable is unconnected with link partner, the TX amplitude is
reduced for power saving.
0: disable Transmit amplitude reduce function
Transmit Power Saving Control Disabled
1: when cable is unconnected with link partner, the driving current
of transmit is reduced for power saving.
0: disable transmit driving power saving function
RESERVED
Ethernet Controller with General Processor Interface
Description
Description
DM9000B
37