24 I/O PORTS (GPIO)
24-30
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
D[3:2]
CFP21[1:0]: P21 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): P21 (GPIO)
0x0 (R/W): SDCLK (SDRAMC) (default)
D[1:0]
CFP20[1:0]: P20 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): P20 (GPIO)
0x0 (R/W): SDCKE (SDRAMC) (default)
P3[3:0] Port Function Select Register (PMUX_P3_03)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
P3[3:0] Port
Function Select
Register
(PMUX_P3_03)
0x300806
(8 bits)
D7–6 CFP33[1:0] P33 port function select
CFP33[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
REMC_I
TFT_CTL3
reserved
P33
D5–4 CFP32[1:0] P32 port function select
CFP32[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
REMC_O
TFT_CTL2
reserved
P32
D3–2 CFP31[1:0] P31 port function select
CFP31[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
T16A_ATMB_0
TFT_CTL1
reserved
P31
D1–0 CFP30[1:0] P30 port function select
CFP30[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
T16A_ATMA_0
TFT_CTL0
reserved
P30
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
CFP33[1:0]: P33 Port Function Select Bits
0x3 (R/W): REMC_I (REMC)
0x2 (R/W): TFT_CTL3 (LCDC)
0x1 (R/W): Reserved
0x0 (R/W): P33 (GPIO) (default)
D[5:4]
CFP32[1:0]: P32 Port Function Select Bits
0x3 (R/W): REMC_O (REMC)
0x2 (R/W): TFT_CTL2 (LCDC)
0x1 (R/W): Reserved
0x0 (R/W): P32 (GPIO) (default)
D[3:2]
CFP31[1:0]: P31 Port Function Select Bits
0x3 (R/W): T16A_ATMB_0 (T16A5 Ch.0)
0x2 (R/W): TFT_CTL1 (LCDC)
0x1 (R/W): Reserved
0x0 (R/W): P31 (GPIO) (default)
D[1:0]
CFP30[1:0]: P30 Port Function Select Bits
0x3 (R/W): T16A_ATMA_0 (T16A5 Ch.0)
0x2 (R/W): TFT_CTL0 (LCDC)
0x1 (R/W): Reserved
0x0 (R/W): P30 (GPIO) (default)