Kontron KTT20-pITX - Manual (Page 42)

KTD-S0044-G Page 38 Appendix A: System Resources
KTT20/pITX User's Guide
Appendix A: System Resources
A.1 Memory Area
The first 512 MB or 1 GB of SDRAM involve the working memory. All registers of the Tegra ® 250 processor
are memory-mapped. Do not write to the register range if you have no knowledge about the register
function.
Memory Range Used for Available Comment
00000000h - 3FFFFFFFh External SDRAM Yes
40000000h - 4003FFFFh Internal RAM (IRAM) No Normally do not access the IRAM
50000000h - FFFFFFFFh Processor register No
A.2 I 2 C TM Bus
The KTT20/pITX uses two I 2 C TM busses. Only one bus is available on a peripheral connector. The other bus
cannot be used for external devices.
I 2 C TM Address NVIDIA ® Label Device Comment
68h / 69h Z.06 / Z.07 Power management unit
98h / 99h Z.06 / Z.07 Temperature sensor
A0h / A1h Z.06 / Z.07 Identification EEPROM
34h / 35h T.05 / T.06 Audio controller 16 bit access