２
2.12.3 HDMI / DVI Level Shifter Requirements ..........................................................７４
2.12.4 ESD Protection................................................................................................７５
2.13 LPC Bus –Low Pin Count Interface.......................................................７６
2.13.1 LPC Signal Definition ......................................................................................７７
2.13.2 LPC Routing Guidelines ..................................................................................７８
2.13.2.1 General Signals ...................................................................................７８
2.13.2.2 Bus Clock Routing ...............................................................................７８
2.13.3 LPC Trace Length Guidelines .........................................................................７８
2.14. CAN Interface *SOM-3567 is not support CAN Interface......................８０
2.14.1 CAN interface Signal Definitions .....................................................................８０
2.14.2 CAN interface Routing Guidelines...................................................................８０
2.14.3 CAN interface Trace Length Guidelines ..........................................................８１
2.15 SPI –Serial Peripheral Interface Bus.....................................................８２
2.15.1 SPI Signal Definition .......................................................................................８２
2.15.2 SPI Routing Guidelines ...................................................................................８３
2.15.3 SPI Trace Length Guidelines...........................................................................８３
2.16 General Purpose I2C Bus Interface .......................................................８４
2.16.1 Signal Definitions ............................................................................................８５
2.16.2 I2C Routing Guidelines ...................................................................................８６
2.16.3 I2C Trace Length Guidelines...........................................................................８６
2.16.4 Connectivity Considerations............................................................................８６
2.17 System Management Bus (SMBus) .......................................................８７
2.17.1 SMB Signal Definitions....................................................................................８８
2.17.2 SMB Routing Guidelines .................................................................................８８
2.17.3 SMB Trace Length Guidelines.........................................................................８９
2.18 UART......................................................................................................９０
2.18.1 UART interface Signal Definitions ...................................................................９０
2.18.2 Serial interface Routing Guidelines .................................................................９０
2.18.3 Serial interface Trace Length Guidelines.........................................................９０
2.19 Miscellaneous Signals............................................................................９１
2.19.1 Miscellaneous Signals.....................................................................................９１
2.19.1.1 Watchdog Control Signals....................................................................９２
2.19.1.2 PC Speaker Output..............................................................................９３
2.19.2 Miscellaneous Signals Routing Guidelines......................................................９３
2.19.3 Miscellaneous Signals Trace Length Guidelines .............................................９３
