Apalis Carrier Board Design Guide - Toradex

Apalis Carrier Board Design Guide2 Interfaces2.1 ArchitectureThe block diagram in Figure 1 shows the basic architecture of the Apalis module, depicting thestandard interfaces and some examples of type-specific interfaces.Standard interfaces are interfaces that are compatible between different Apalis modules. The pinsare reserved for this specific function and are not used for other purpose. This guarantees electricalcompatibility between carrier board designs which only uses the standard interfaces. This helps toensure longevity of carrier board designs and provides support for future modules. Some modulesmay not feature all the standard interfaces. In this case, for the GPIO compatible interfaces, GPIOfunctionality is provided. Other interfaces on the module might be left disconnected.Type-specific interfaces are interfaces which are not guaranteed to be functionally or electricallycompatible between modules. If a carrier board design uses such interfaces, then it is possible thatother modules in the Apalis module family do not provide these interfaces and instead provideanother interface on the associated pins. These interfaces might be electrically incompatible. In thiscase, the carrier board will be restricted for use only with certain Apalis modules.SATA (x1)PCI Express (x4)PWM (x4)I2C (x3)Parallel CameraAnalogue and ResistiveTouchPCI Express (x1)Camera Serial Interface(CSI)Display Serial Interface(DSI)SPI (x2)Digital Audio24 Bit Parallel LCDApalis ModuleDual Channel LVDSVGASPDIFMMC (8 bit)SDIO (4 bit)CAN (x2)HDMI/DVIUART (x4)GPIO (x8)(dedicated, many moreavailable)USB(2 x USB3.0)(2 x USB2.0)(1x USB client shared)Gigabit EthernetAnalogue AudioFunction is standard: Reserved on every module (however, not necessarilyimplemented on every module). Will only be used for this purpose or GPIO.Figure 1: Apalis Module ArchitectureFunction is type specific: May only be present on specific modules and isnot guaranteed to be electrically or functionality compatible on differentmodules; the pins may be used for as yet undefined interfacesToradex AG l Altsagenstrasse 5 l 6048 Horw l Switzerland l +41 41 500 48 00 l www.toradex.com l info@toradex.com Page | 10