0x52a1: P1 Port Function Select Register (P1_PMUX)
Register name Address
Bit
P1 Port
0x52a1
D7
Function Select
(8 bits)
D6
D5
Register
(P1_PMUX)
D4
D3
D2–0 –
The P13 to P15 and P17 input/output port pins are shared with the peripheral module pins. This register is used to
select how the pins are used.
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
S1C17001 TECHNICAL MANUAL
Name
Function
P17MUX
P17 port function select
–
reserved
P15MUX
P15 port function select
P14MUX
P14 port function select
P13MUX
P13 port function select
reserved
EPSON
10 INPUT/OUTPUT PORT (P)
Setting
Init. R/W
1 #SPISS
0 P17
–
1 SCL
0 P15
1 SDA
0 P14
1 FOUT1
0 P13
–
Remarks
0
R/W
–
–
0 when being read.
0
R/W
0
R/W
0
R/W
–
–
0 when being read.
103