Test Procedure for the KSZ8851SNL Eval Board Test Procedure for the KSZ8851SNL (32-pin) Eval Board (Rev1.1) Version 1.1 April 2010 Micrel Confidential 1 April 2010 Test Procedure for the KSZ8851SNL Eval Board Content 1 INTRODUCTION........................................................................................................ 3 2 REQUIRED TEST EQUIPMENT ............................................................................. 3 3 SYSTEM CONNECTIVITY AND SET-UP FOR TEST ....................................... 3 4 BOARD TEST PROCEDURES .................................................................................. 4 4.1 4.2 4.3 4.4 4.5 VERIFYING ON BOARD LDO 3.3V OUTPUT FOR VDD_IO ............................... 4 VERIFYING ON BOARD LDO 2.5V OUTPUT FOR VDD_IO ............................... 4 VERIFYING ON BOARD LDO 1.8V OUTPUT FOR VDD_IO ............................... 4 VERIFYING POWER CONSUMPTION ........................................................................ 5 VERIFYING ETHERNET LINK AND LED STATUS ................................................. 5 List of Figures Figure 1: KSZ8851SNL Eval Board Test Set-up ..................................... 4 List of Tables Table 1: KSZ8851SNL Eval Board Jumper Setting................................. 3 Revision History Revision Date 1.0 07-22-08 1.1 04-21-10 Micrel Confidential Summary of Changes Initial Release Removed JP3 for EESK strapping option. Add JP3 for connection between VDD_IO and 1.8V (if VDD_IO is 1.8V). Changed the LED pulled up to 3.3V. Add 4.7K pull up on SO pin. 2 April 2010 Test Procedure for the KSZ8851SNL Eval Board 1 Introduction This document describes a test procedure required to bring-up a new KSZ8851SNL Eval board. This board is designed to provide a convenient way to evaluate or demonstrate the functionality and performance of the Single-port Ethernet MAC Controller. This KSZ8851SNL Eval board can operate on SPI (Serial Peripheral Interface) to any external Microprocessor. By default the KSZ8851SNL Eval board comes with an operation without EEPROM interface. 2 Required Test Equipment ¾ Agilent +5 volt DC power supply. ¾ 10/100 Ethernet Smartbit Module. ¾ Ethernet cable and Power wires. 3 System Connectivity and Set-up for Test The KSZ8851SNL Eval board test set up as shown in the Figure 1. The KSZ8851SNL-Eval board receives +5V power from the header JP1. The following Table shows all the default jumper settings and connections for the KSZ8851SNL Eval Board Test. Jumper Definition Pin 1 Setting Description 5.0V_IN +5V power supply input pin for this board Pin 2 GND Ground input pin JP2 EED_IO OFF (Default) OFF: EEPROM is not present ON: EEPROM is present JP3 1.8V OFF (Default) OFF: VDD_IO is 2.5V or 3.3V ON: VDD_IO is 1.8V JP4 3.3V ON (Default) ON: to select 3.3V for VDD_IO (JP5 and JP6 must be OFF) OFF: De-select 3.3V JP5 2.5V OFF (Default) ON: to select 2.5V for VDD_IO (JP4 and JP6 must be OFF) OFF: De-select 2.5V JP6 1.8V OFF (Default) ON: to select 1.8V for VDD_IO (JP4 and JP5 must be OFF) OFF: De-select 1.8V JP1 Table 1: KSZ8851SNL Eval Board Jumper Setting Micrel Confidential 3 April 2010 Test Procedure for the KSZ8851SNL Eval Board Please perform the following steps to power on the Eval Board for test: 1. Connect the Ethernet cable between the Smartbit and the Eval Board 2. Connect the +5V DC power wires to Eval Board on pin 1 (+5V) and pin 2 (GND) of JP1. Figure 1: KSZ8851SNL Eval Board Test Set-up 4 Board Test Procedures 4.1 Verifying on Board LDO 3.3V Output for VDD_IO To make sure the jumper JP4 is “ON” to select 3.3V for VDD_IO (JP5 and JP6 must be OFF), then Power up +5V supply from Agilent to the KSZ8851SNL Eval board. To measure three Test Points voltage as below: TP1 (1.8V) = 1.8V +/-5% (The internal LDO of KSZ8851SNL is bad if there is no 1.8V) TP2 (VDD_IO) = 3.3V +/-5% (The U4 is bad if there is no 3.3V) TP3 (3.3VA) = 3.3V +/-5% (The U3 is bad if there is no 3.3V) 4.2 Verifying on Board LDO 2.5V Output for VDD_IO To make sure the jumper JP5 is “ON” to select 2.5V for VDD_IO (JP4 and JP6 must be OFF), then Power up +5V supply from Agilent to the KSZ8851SNL Eval board. To measure three Test Points voltage as below: TP1 (1.8V) = 1.8V +/-5% (The internal LDO of KSZ8851SNL is bad if there is no 1.8V) TP2 (VDD_IO) = 2.5V +/-5% (The U4 is bad if there is no 2.5V) TP3 (3.3VA) = 3.3V +/-5% (The U3 is bad if there is no 3.3V) 4.3 Verifying on Board LDO 1.8V Output for VDD_IO JP3 must set ON in order to supply the 1.8V to KSZ8851M when VDD_IO is 1.8V. To make sure the jumper JP6 is “ON” to select 1.8V for VDD_IO (JP4 and JP5 must be OFF), then Power up +5V supply from Agilent to the KSZ8851SNL Eval board. These Test Points must measure as below: Micrel Confidential 4 April 2010 Test Procedure for the KSZ8851SNL Eval Board TP1 (1.8V) = TP2 (VDD_IO) = 1.8V +/-5% (The U4 is bad if there is no 1.8V) TP3 (3.3VA) = 3.3V +/-5% (The U3 is bad if there is no 3.3V) 4.4 Verifying Power Consumption Power up +5V supply from Agilent to the KSZ8851SNL Eval board, the current consumption must be around 100mA during link down (without cable) and around 150mA during link up (at 100BT). 4.5 Verifying Ethernet Link and LED Status Power up +5V supply from Agilent to the KSZ8851SNL Eval board and connect Ethernet cable from Smartbit to KSZ8851SNL Eval board. To make sure both LED are on when Smartbit is set auto-neg enabled, then send continuous packets to KSZ8851SNL, check the upper LED is blinking. All three VDD_IO voltages 3.3V (JP4 ON), 2.5V (JP5 ON) and 1.8V (JP6 ON and JP3 on) have to test for Ethernet link and LED status. Micrel Confidential 5 April 2010