dm9332 Davicom Semiconductor, Inc., dm9332 Datasheet - Page 49

• Manufacturer Part Number: dm9332
• Description: 10/100mbps Ethernet Fiber/twisted Pair Single Chip Media Converter
• Manufacturer: Davicom Semiconductor, Inc.

two-wired serial interface to obtain and control the
status of the physical layer through the MII interface.
The serial control interface consists of MDC
(Management Data Clock), and MDI/O (Management
Data Input/Output) signals.
by up to 32 devices.
Preliminary datasheet
DM9332-15-DS-P01
August 26, 2009
The serial control interface uses a simple
The MDIO pin is bi-directional and may be shared
MDIO Read
MDIO Write
9.3.3 Serial Management Interface
9.3.4 Management Interface - Read Frame Structure
9.3.5 Management Interface - Write Frame Structure
MDC
MDC
Idle
Idle Preamble
Preamble
32 "1"s
32 "1"s
0
0
SFD
SFD
1
1
1
Op Code
0
Op Code
10/100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter
0
1
Write
A4
A4
PHY Address
PHY Address
A3
A3
A0
A0
Write
R4
R4
Register Address
Register Address
R3
R3
R0
R0
Z
Turn Around
Turn Around
1
0
0
D15
D15
D14
D14
Read
Data
Data
//
D1
D1
D0
DM9332
D0
Idle
Idle
//
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