QSG-5200
4
Holt Integrated Circuits
Features
●
Holt 10Base-T/100Base-TX Physical Layer Transceiver
●
RJ-45 Jack for Fast Ethernet cable interface
●
HP Auto-MDIX for automatic detection and correction for straight-through and crossover cables
●
MII (Media Independent Interface) connector to interface with a MAC controller
●
RMII (Reduced MII) option with external 50MHz system clock
●
2 LED Indicators for status and activity
●
Jumpers to configure strapping pins
●
Manual Reset Button for quick reboot after re-configuration of strapping pins
Hardware Design Overview
Figure 2 shows a block diagram of the HI-5200 ADK evaluation board. It plugs into any industry standard
“Fast Ethernet” board with Ethernet MACs that expose the MII interface. Configuration of the HI-5200 is
accomplished through on-board jumper selections and/or by PHY register access via the MDC/MDIO
management pins of the MII Interface.
Other features include a RJ-45 Jack for “Fast Ethernet” cable connection, programmable LEDs for
reporting link status and activity, and a manual reset button for quick reboot after reconfiguration of
strapping pins.
The HI-5200 evaluation board re5V DC input power through its MII connector.
Figure 2. ADK-5200 Evaluation Board Block Diagram
10Base-T
100Base-TX
RJ45 Jack
Single Port
Magnetic
Module
TX / RX
Pairs
HI-5200PC
Config
Headers
Port
Status
LEDs
Config
Headers
Reset
Button
M
II
/
R
M
II
P
o
rt
C
o
n
n
e
c
to
r
MII / RMII
Signals
Port
Status
LEDs
25 MHz
Crystal
Oscillator
MII Mode Only
RMII 50 MHz REF_CLK
LDO 3.3V
Regulator
5 VDC
Input
RMII Mode Only (From MAC)
