24 I/O PORTS (GPIO)
24-32
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
D[5:4]
CFP42[1:0]: P42 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): FPDAT16 (LCDC)
0x1 (R/W): P42 (GPIO)
0x0 (R/W): A23 (SRAMC) (default)
D[3:2]
CFP41[1:0]: P41 Port Function Select Bits
0x3 (R/W): #NAND_WR (CARD)
0x2 (R/W): FPDAT17 (LCDC)
0x1 (R/W): P41 (GPIO)
0x0 (R/W): A22 (SRAMC) (default)
D[1:0]
CFP40[1:0]: P40 Port Function Select Bits
0x3 (R/W): #NAND_RD (CARD)
0x2 (R/W): FPDAT18 (LCDC)
0x1 (R/W): P40 (GPIO)
0x0 (R/W): A21 (SRAMC) (default)
P5[3:0] Port Function Select Register (PMUX_P5_03)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
P5[3:0] Port
Function Select
Register
(PMUX_P5_03)
0x30080a
(8 bits)
D7–6 CFP53[1:0] P53 port function select
CFP53[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
reserved
reserved
P53
#CE10
D5–4 CFP52[1:0] P52 port function select
CFP52[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
reserved
#CE5
P52
#CE9
D3–2 CFP51[1:0] P51 port function select
CFP51[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
reserved
#CE4
P51
#CE8
D1–0 CFP50[1:0] P50 port function select
CFP50[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
reserved
#SDCS
P50
#CE7
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
CFP53[1:0]: P53 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): P53 (GPIO)
0x0 (R/W): #CE10 (SRAMC) (default)
D[5:4]
CFP52[1:0]: P52 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): #CE5 (SRAMC)
0x1 (R/W): P52 (GPIO)
0x0 (R/W): #CE9 (SRAMC) (default)
D[3:2]
CFP51[1:0]: P51 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): #CE4 (SRAMC)
0x1 (R/W): P51 (GPIO)
0x0 (R/W): #CE8 (SRAMC) (default)