You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>VIPER</strong> <strong>Technical</strong> <strong>Manual</strong>Detailed hardware descriptionI 2 CThe PXA255 I 2 C interface is brought out to the COMs connector PL4, see PL4 – COMSports, page 89, for connection details.The I 2 C unit supports a fast mode operation of 400Kbits/s and a standard mode of100Kbits/s.Fast-mode devices are downward-compatible and can communicate with standardmodedevices in a 0 to 100Kbits/s I 2 C-bus system. As standard-mode devices, however,are not upward compatible, they should not be incorporated in a fast-mode I 2 C-bussystem as they cannot follow the higher transfer rate and unpredictable states willoccur.The I 2 C unit does not support the hardware general call, 10-bit addressing, orCBUS compatibility.Keep bus loads below 200pF.TPMVLThe <strong>VIPER</strong> provides the option for an Atmel AT97SC3201 Trusted Platform Module(TPM), which provides full TCG/TCPA V1.1b compatibility. For further details pleasecontact Arcom (see Appendix A – Contacting Arcom, page 101) for purchasinginformation.When the TPM is fitted OUT6 and OUT7 from the general purpose I/O interfaceare not available.© 2007 Arcom Issue D 71
Change language