24 I/O PORTS (GPIO)
24-36
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
P9[3:0] Port Function Select Register (PMUX_P9_03)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
P9[3:0] Port
Function Select
Register
(PMUX_P9_03)
0x300812
(8 bits)
D7–6 CFP93[1:0] P93 port function select
CFP93[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
#SRDY0
LCD_D3
FPDAT3
P93
D5–4 CFP92[1:0] P92 port function select
CFP92[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
SCLK0
LCD_D2
FPDAT2
P92
D3–2 CFP91[1:0] P91 port function select
CFP91[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
SOUT0
LCD_D1
FPDAT1
P91
D1–0 CFP90[1:0] P90 port function select
CFP90[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
SIN0
LCD_D0
FPDAT0
P90
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
CFP93[1:0]: P93 Port Function Select Bits
0x3 (R/W): #SRDY0 (FSIO Ch.0)
0x2 (R/W): LCD_D3 (USIL)
0x1 (R/W): FPDAT3 (LCDC)
0x0 (R/W): P93 (GPIO) (default)
D[5:4]
CFP92[1:0]: P92 Port Function Select Bits
0x3 (R/W): SCLK0 (FSIO Ch.0)
0x2 (R/W): LCD_D2 (USIL)
0x1 (R/W): FPDAT2 (LCDC)
0x0 (R/W): P92 (GPIO) (default)
D[3:2]
CFP91[1:0]: P91 Port Function Select Bits
0x3 (R/W): SOUT0 (FSIO Ch.0)
0x2 (R/W): LCD_D1 (USIL)
0x1 (R/W): FPDAT1 (LCDC)
0x0 (R/W): P91 (GPIO) (default)
D[1:0]
CFP90[1:0]: P90 Port Function Select Bits
0x3 (R/W): SIN0 (FSIO Ch.0)
0x2 (R/W): LCD_D0 (USIL)
0x1 (R/W): FPDAT0 (LCDC)
0x0 (R/W): P90 (GPIO) (default)