24 I/O PORTS (GPIO)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
24-39
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]
CFPA6[1:0]: PA6 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): #ADTRIG (ADC10)
0x0 (R/W): PA6 (GPIO) (default)
D[3:2]
CFPA5[1:0]: PA5 Port Function Select Bits
0x3 (R/W): REMC_I (REMC)
0x2 (R/W): T16A_ATMB_1 (T16A5 Ch.1)
0x1 (R/W): PA5 (GPIO)
0x0 (R/W): A25 (SRAMC) (default)
D[1:0]
CFPA4[1:0]: PA4 Port Function Select Bits
0x3 (R/W): REMC_O (REMC)
0x2 (R/W): T16A_ATMA_1 (T16A5 Ch.1)
0x1 (R/W): PA4 (GPIO)
0x0 (R/W): A24 (SRAMC) (default)
PB[3:0] Port Function Select Register (PMUX_PB_03)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
PB[3:0] Port
Function Select
Register
(PMUX_PB_03)
0x300816
(8 bits)
D7–6 CFPB3[1:0] PB3 port function select
CFPB3[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
PWM_L
I2S_MCLK
FPDAT11
PB3
D5–4 CFPB2[1:0] PB2 port function select
CFPB2[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
PWM_H
I2S_SCLK
FPDAT10
PB2
D3–2 CFPB1[1:0] PB1 port function select
CFPB1[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
reserved
I2S_WS
FPDAT9
PB1
D1–0 CFPB0[1:0] PB0 port function select
CFPB0[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
reserved
I2S_SDO
FPDAT8
PB0
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
CFPB3[1:0]: PB3 Port Function Select Bits
0x3 (R/W): PWM_L (T16P)
0x2 (R/W): I2S_MCLK (I2S)
0x1 (R/W): FPDAT11 (LCDC)
0x0 (R/W): PB3 (GPIO) (default)
D[5:4]
CFPB2[1:0]: PB2 Port Function Select Bits
0x3 (R/W): PWM_H (T16P)
0x2 (R/W): I2S_SCLK (I2S)
0x1 (R/W): FPDAT10 (LCDC)
0x0 (R/W): PB2 (GPIO) (default)
D[3:2]
CFPB1[1:0]: PB1 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): I2S_WS (I2S)
0x1 (R/W): FPDAT9 (LCDC)
0x0 (R/W): PB1 (GPIO) (default)