AP16185 Design guideline for XC2000 and XE16x Microcontroller board layout XC2000 and XE16x family of products XC2331D, XC2234L, XC2733X, XC2230L, XC2330D, XE162FL, XE162HL, XC2220L , XC2224L, XC2320D, XC2321D, XC2723X , XE161FL, XE161HL, XC2320S, XC2722X , XC2220U, XE161FU, XC2310S, XC2712X, XC2210U, XE160FU About this document Scope and purpose The XC2000 and XE16x families are a 32-/16-Bit microcontroller family in QFP-64, VQFN-48 and TSSOP-38 pin packages. These require a PCB carefully designed for electromagnetic compatibility and power supply system (Exposed Pad connection on the center of the package). This document provides some product-specific recommendations and guidelines for the XC2000 and XE16x families, and should be read in conjunction with the Infineon PCB Design Guidelines for Microcontrollers (AP24026), which gives general design rule informations for PCB design. Intended audience Engineers implementing design solutions incorporating the XC2000 and XE16x products. Table of Contents About this document ......................................................................................................................... 1 Table of Contents .............................................................................................................................. 1 1 Overview ........................................................................................................................ 2 1.1 Pinout of XC2000 and XE16x ................................................................................................................... 2 2 PCB Design Recommendations ......................................................................................... 4 2.1 Decoupling ............................................................................................................................................... 5 2.2 Decoupling Capacitor List ....................................................................................................................... 9 Revision History...............................................................................................................................10 Application Note Please read the Important Notice and Warnings at the end of this document V1.3 www.infineon.com 2016-07 Design guideline for XC2000 and XE16x Microcontroller board layout XC2000 and XE16x family of products Overview 1 Overview The microcontroller has one supply domain VDDPB for the range 3.3 V 5.0 V, which should be decoupled with capacitors. There is another one core supply domain (VDDIM), which can be generated by the on-chip voltage regulator or can be fed externally. For the discussion in this document it is assumed that on-chip voltage regulators deliver these voltages. Even though the voltage is generated on chip, it should be decoupled with external decaps on the application board. Special care should be given to the decap connections for VDDIM pins. 1.1 Pinout of XC2000 and XE16x Note: These pinouts apply to both the XC2000 and XE166 families. Figure 1 Pinout of XC2000 (64 and 48 pin packages) Application Note 2 V1.3 2016-07