Microchip Technology megaAVR 0 Series Manual page 134

14.3.4 PORTMUX Control for TWI and SPI
Name: TWISPIROUTEA
Offset: 0x03
Reset: 0x00
Property: -
Bit 7
Access
Reset
Bits 5:4 – TWI0[1:0] TWI 0 communication
Write these bits to select alternative communication pins for TWI 0.
Value Name
0x0 DEFAULT
0x1 ALT1
0x2 ALT2
0x3 -
Bits 1:0 – SPI0[1:0] SPI 0 communication
Write these bits to select alternative communication pins for SPI 0.
Value Name
0x0 DEFAULT
0x1 ALT1
0x2 ALT2
0x3 NONE
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2018 Microchip Technology Inc.
6 5
TWI0[1:0]
R/W
0
Description
SCL/SDA on PA[3:2], Slave mode on PC[3:2] in dual TWI mode
SCL/SDA on PA[3:2], Slave mode on PF[3:2] in dual TWI mode
SCL/SDA on PC[3:2], Slave mode on PF[3:2] in dual TWI mode
Reserved
Description
SPI on PA[7:4]
SPI on PC[3:0]
SPI on PE[3:0]
Not connected to any pins
4 3
R/W
0
Datasheet Preliminary
®
megaAVR 0-Series
Port Multiplexer (PORTMUX)
2 1
SPI0[1:0]
R/W
0
DS40002015A-page 134
0
R/W
0