24 I/O PORTS (GPIO)
24-38
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
PA[3:0] Port Function Select Register (PMUX_PA_03)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
PA[3:0] Port
Function Select
Register
(PMUX_PA_03)
0x300814
(8 bits)
D7–6 CFPA3[1:0] PA3 port function select
CFPA3[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
FPDAT23
FPDAT19
#SRDY1
PA3
D5–4 CFPA2[1:0] PA2 port function select
CFPA2[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
FPDAT22
FPDAT18
SCLK1
PA2
D3–2 CFPA1[1:0] PA1 port function select
CFPA1[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
FPDAT21
FPDAT17
SOUT1
PA1
D1–0 CFPA0[1:0] PA0 port function select
CFPA0[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
FPDAT20
FPDAT16
SIN1
PA0
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
CFPA3[1:0]: PA3 Port Function Select Bits
0x3 (R/W): FPDAT23 (LCDC)
0x2 (R/W): FPDAT19 (LCDC)
0x1 (R/W): #SRDY1 (FSIO Ch.1)
0x0 (R/W): PA3 (GPIO) (default)
D[5:4]
CFPA2[1:0]: PA2 Port Function Select Bits
0x3 (R/W): FPDAT22 (LCDC)
0x2 (R/W): FPDAT18 (LCDC)
0x1 (R/W): SCLK1 (FSIO Ch.1)
0x0 (R/W): PA2 (GPIO) (default)
D[3:2]
CFPA1[1:0]: PA1 Port Function Select Bits
0x3 (R/W): FPDAT21 (LCDC)
0x2 (R/W): FPDAT17 (LCDC)
0x1 (R/W): SOUT1 (FSIO Ch.1)
0x0 (R/W): PA1 (GPIO) (default)
D[1:0]
CFPA0[1:0]: PA0 Port Function Select Bits
0x3 (R/W): FPDAT20 (LCDC)
0x2 (R/W): FPDAT16 (LCDC)
0x1 (R/W): SIN1 (FSIO Ch.1)
0x0 (R/W): PA0 (GPIO) (default)
PA[6:4] Port Function Select Register (PMUX_PA_46)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
PA[6:4] Port
Function Select
Register
(PMUX_PA_46)
0x300815
(8 bits)
D7–6 –
reserved
–
–
–
0 when being read.
D5–4 CFPA6[1:0] PA6 port function select
CFPA6[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
reserved
reserved
#ADTRIG
PA6
D3–2 CFPA5[1:0] PA5 port function select
CFPA5[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
REMC_I
T16A_ATMB_1
PA5
A25
D1–0 CFPA4[1:0] PA4 port function select
CFPA4[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
REMC_O
T16A_ATMA_1
PA4
A24