KSZ9031RNX-EVAL Board User’s Guide
Micrel, Inc.
August 17, 2012
Rev.
1.1
9/22
4.2 Test
Point
Definition
The KSZ9031RNX-EVAL board has 16 usable test points, as defined in the following table.
Test Point
Definition
TP4
Interrupt Signal (KSZ9031RNX pin 38) with 4.7K external pull-up
TP7
AVDDH voltage – KSZ9031RNX power pins
TP12
AVDDL voltage – KSZ9031RNX power pins
TP14
DVDDL – KSZ9031RNX power pins
TP15
AVDDL_PLL – KSZ9031RNX power pin
TP16
DVDDH – KSZ9031RNX power pins
TP17 Signal
Ground
TP18 Signal
Ground
TP19 Signal
Ground
TP20 Signal
Ground
TP24 Signal
Ground
TP33
Exposed ground connection to KSZ9031RNX paddle ground
(bottom of chip); Test point is located on solder side of PCB.
TP34
End point for board trace delay for RGMII RX_CLK output clock;
Refer to KSZ9031RNX-EVAL Board Schematic for more details.
TP35
1.8ns (10000 mils) board trace delay for RGMII RX_CLK output
clock, starting from resistor R144; Refer to KSZ9031RNX-EVAL
Board Schematic for more details.
TP36-TP37
450ps (2500 mils) board trace delay for RGMII RX_CLK output
clock; Refer to KSZ9031RNX-EVAL Board Schematic for more
details.
Table 3. KSZ9031RNX-EVAL Board – Test Point Definition
4.3 RJ-45 Copper Interface
The RJ-45 copper interface (RJ1) connects to standard unshielded twisted pair (UTP) CAT-5
Ethernet cable to interface with 10Base-T/100Base-TX/1000Base-T network devices.
The KSZ9031RNX copper media interface can automatically detect and correct for differential
pair misplacements and polarity reversals, and correct propagation delays and re-sync timing
between the four differential pairs, as specified in the IEEE 802.3 standard for 1000Base-T
operation.
Auto MDI/MDI-X is supported for automatic detection and correction for straight and crossover
cables when interfacing to link partners with fixed MDI or MDI-X setting.
4.4 LED
Indicators
The KSZ9031RNX device provides two programmable LED output pins, LED2 (pin 15) and LED1
(pin 17). On the KSZ9031RNX-EVAL board, these two LED pins are connected to two sets of
LEDs to support two LED configurations: Single LED mode and Tri-color Dual LED mode.
