0X52A1: P1 Port Function Select Register (P1_Pmux) - Epson S1C17704 Technical Manual

10 I/O PORTS (P)

0x52a1: P1 Port Function Select Register (P1_PMUX)

Register name Address Bit
P1 Port 0x52a1 D7
Function Select (8 bits) D6
Register D5
(P1_PMUX) D4
D3
D2–0 –
The P13–P15 and P17 I/O port pins are shared with a peripheral module. This register configures the pin functions.
D7 P17MUX: P17 Port Function Select Bit
1 (R/W): #SPISS (SPI)
0 (R/W): P17 port (default)
D6 Reserved
D5 P15MUX: P15 Port Function Select Bit
1 (R/W): SCL (I2C)
0 (R/W): P15 port (default)
D4 P14MUX: P14 Port Function Select Bit
1 (R/W): SDA (I2C)
0 (R/W): P14 port (default)
D3 P13MUX: P13 Port Function Select Bit
1 (R/W): FOUT1 (OSC)
0 (R/W): P13 port (default)
D[2:0] Reserved
10-22
Name Function
P17MUX P17 port function select
–
reserved
P15MUX P15 port function select
P14MUX
P14 port function select
P13MUX P13 port function select
reserved
Setting
1 #SPISS 0 P17
–
1 SCL 0 P15
1 SDA 0 P14
1 FOUT1 0 P13
–
EPSON
Init. R/W Remarks
0 R/W
– – 0 when being read.
0 R/W
0 R/W
0 R/W
– – 0 when being read.
S1C17704 TECHNICAL MANUAL