928Chapter 20 Port FunctionsUser’s Manual U16580EE3V1UD0020.3.9 Port 8Port 8 is a 7-bit I/O port that can be set to input or output mode in 1-bit units.(1) Functions• Input/output data can be specified in 1-bit units by using the port register 8 (P8).• Input or output mode can be set in 1-bit units by using the port mode register 8 (PM8).• Port mode or control mode (for alternate function) can be specified in 1-bit units by using theport mode control register 8 (PMC8).• The external interrupt request inputs shared with the input port functionality of port 8 are alwaysenabled in input port mode.Table 20-12: Alternate Function Pins and Port Types of Port 8Port Alternate Function Remark Port TypePort 8 P80 SI30 Serial interface (CSI30) input 2P81 SO30 Serial interface (CSI30) output 1SP82 SCK30 Serial interface (CSI30) I/O 4P83 SCS300,INTP6Serial interface (CSI30) output,External interrupt request input7P84 SCS301,INTP7Serial interface (CSI30) output,External interrupt request inputP85 SCS302,INTP8Serial interface (CSI30) output,External interrupt request inputP86 SCS303,SSB0Serial interface (CSI30) output,Serial interface (CSIB0) input5
