AKD8140A -Preliminary- AKD8140A Ver.2 Evaluation Board for AK8140A 1. Discription AKD8140A Ver.2 is an evalutation board for AK8140A Programmable Multi Clock Generator. It is ease to evaluation Jitter performances and functions. 2. Ordering guide AKD8140A Ver.2 3. Block Diagram VDD VSS VDDO VSSO CLK1 PD_N S0 SCL CLK2 AK8140A CLK3 CLK4p SDA XIN XOUT CLK4n Figure 1 : AKD8140A Block Diagram AKD8140A-Ver.2-E-pre Sep-2012 1 AKD8140A 4. AKD8140A Ver.2 Evaluation Board USB port VDD_IF JP7 GND1 JP4 External Input CLK3 GND1 SW6 SW5 VDDO VDD R2=0[] Crystal Unit SW1 CLK4n CLK4p SW2 SW3 CLK2 JP8 SW4 : PD_N CLK1 Figure 2 : AKD8140A Ver.2 Evaluation Board 1) Power Supply VDD = VDD1 = VDD2 = VDD3 = VDD4, VDDO = VDDO1 = VDDO2 [JP4] Short GND1 and GND2 [JP7] Short VDD and VDD_IF [JP8] Short VDD and VDDO, when VDD=VDDO=3.3V. Open VDD and VDDO, when VDD=3.3V and VDDO=1.8V. 2) SW Setting [SW1] Short Pro and JR [SW2] Short Pro and JR [SW3] Short M and L, so GND pin and S0 pin is connected to GND. [SW4] SW4 = GND1 is PD_N pin = ”L”, when AK8140A is power down. SW4 = VDD1 is PD_N pin = ”H”, when AK8140A is operating. Sep-2012 AKD8140A-Ver.2-E-pre 2 AKD8140A 3) Clock Input The clock input is selectable to provide from External Clock or Crystal Unit. [External Input] Mount 0[] register in R2, when External Clock Input is connected to AK8140A XIN pin. [Crystal Unit] Mount 3225 size or 2520 size Crystal Unit, when Crystal Unit is connected to AK8140A XIN pin and XOUT pin. Don’t mount 0[] register in R2. 4) USB port Register of AKD8140 is written form PC through USB cable (USB A - miniB). [USB port] USB cable can be connected. AKD8140A-Ver.2-E-pre Sep-2012 3 AKD8140A Sep-2012 AKD8140A-Ver.2-E-pre 4 AKD8140A AKD8140A-Ver.2-E-pre Sep -2012 5 AKD8140A Sep-2012 AKD8140A-Ver.2-E-pre 6