
24 I/O PORTS (GPIO)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
24-31
P3[6:4] Port Function Select Register (PMUX_P3_46)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
P3[6:4] Port
Function Select
Register
(PMUX_P3_46)
0x300807
(8 bits)
D7–6 –
reserved
–
–
–
0 when being read.
D5–4 CFP36[1:0] P36 port function select
CFP36[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
reserved
reserved
P36
DST2
D3–2 CFP35[1:0] P35 port function select
CFP35[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
reserved
reserved
P35
DSIO
D1–0 CFP34[1:0] P34 port function select
CFP34[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
reserved
reserved
P34
DCLK
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
Reserved
D[5:4]
CFP36[1:0]: P36 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): P36 (GPIO)
0x0 (R/W): DST2 (DBG) (default)
D[3:2]
CFP35[1:0]: P35 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): P35 (GPIO)
0x0 (R/W): DSIO (DBG) (default)
D[1:0]
CFP34[1:0]: P34 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): P34 (GPIO)
0x0 (R/W): DCLK (DBG) (default)
P4[2:0] Port Function Select Register (PMUX_P4_02)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
P4[2:0] Port
Function Select
Register
(PMUX_P4_02)
0x300808
(8 bits)
D7–6 –
reserved
–
–
–
0 when being read.
D5–4 CFP42[1:0] P42 port function select
CFP42[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
reserved
FPDAT16
P42
A23
D3–2 CFP41[1:0] P41 port function select
CFP41[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
#NAND_WR
FPDAT17
P41
A22
D1–0 CFP40[1:0] P40 port function select
CFP40[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
#NAND_RD
FPDAT18
P40
A21
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
Reserved