7-17
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
7.7.4.
P3 Port Group
The P3 port group consists of seven ports P30
–
P36 and they support the GPIO and interrupt functions.
Table 7.7.4.1 Control Registers for P3 Port Group
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
PPORTP3DAT
(P3 Port Data
Register)
15
–
8
P3OUT[7:0]
0x00
H0
R/W
–
7
–
0
P3IN[7:0]
0x00
H0
R
PPORTP3IOEN
(P3 Port Enable
Register)
15
–
8
P3IEN[7:0]
0x00
H0
R/W
–
7
–
0
P3OEN[7:0]
0x00
H0
R/W
PPORTP3RCTL
(P3 Port Pull-
up/down Control
Register)
15
–
8
P3PDPU[7:0]
0x00
H0
R/W
–
7
–
0
P3REN[7:0]
0x00
H0
R/W
PPORTP3INTF
(P3 Port Interrupt
Flag Register)
15
–
8
–
0x00
–
R
–
7
–
0
P3IF[7:0]
0x00
H0
R/W
Cleared by writing 1.
PPORTP3INTCTL
(P3 Port Interrupt
Control Register)
15
–
8
P3EDGE[7:0]
0x00
H0
R/W
–
7
–
0
P3IE[7:0]
0x00
H0
R/W
PPORTP3CHATEN
(P3 Port Chattering
Filter Enable
Register)
15
–
8
–
0x00
–
R
–
7
–
0
P3CHATEN[7:0]
0x00
H0
R/W
PPORTP3MODSEL
(P3 Port Mode
Select Register)
15
–
8
–
0x00
–
R
–
7
–
0
P3SEL[7:0]
0x00
H0
R/W
PPORTP3FNCSEL
(P3 Port Function
Select Register)
15
–
14
P37MUX[1:0]
0x0
H0
R/W
–
13
–
12
P36MUX[1:0]
0x0
H0
R/W
11
–
10
P35MUX[1:0]
0x0
H0
R/W
9
–
8
P34MUX[1:0]
0x0
H0
R/W
7
–
6
P33MUX[1:0]
0x0
H0
R/W
5
–
4
P32MUX[1:0]
0x0
H0
R/W
3
–
2
P31MUX[1:0]
0x0
H0
R/W
1
–
0
P30MUX[1:0]
0x0
H0
R/W
Table 7.7.4.2 P3 Port Group Function Assignment
Port
name
P3SEL
y
= 0
P3SEL
y
= 1
GPIO
P3
y
MUX = 0x0
(Function 0)
P3
y
MUX = 0x1
(Function 1)
P3
y
MUX = 0x2
(Function 2)
P3
y
MUX = 0x3
(Function 3)
Peripheral
Pin
Peripheral
Pin
Peripheral
Pin
Peripheral
Pin
P30
P30
RFC
RFCLKO0
UPMUX
*1
–
–
–
–
P31
P31
REMC3
REMO
UPMUX
*1
–
–
–
–
P32
P32
REMC3
CLPLS
UPMUX
*1
–
–
–
–
P33
P33
–
–
UPMUX
*1
–
–
–
–
P34
P34
–
–
UPMUX
*1
–
–
–
–
P35
P35
–
–
UPMUX
*1
–
–
–
–
P36
P36
–
–
UPMUX
*1
–
–
–
–
P37
P37
–
–
UPMUX
*1
–
–
–
–
*1: Refer to the
“Universal
Port
Multiplexer”
chapter.
Summary of Contents for S1C31D50
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