
User Manual - Rev1.0.2
M13design - 16 Dec. 21
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3.11
I²C INTERFACE
The
M13-RA6M3-EK
board uses two I²C channels which are divided between the I²C Bus Interface
module (IIC) and the Serial Communication Interface (SCI).
channels are mapped on the board.
Table 30. I²C pin assignment
U1 Pin
RA6M3 Pin Functions
Board
Assignment
Signal Name
Default
Function
Remarks
52
P204 / SCL0_B
Main I²C Bus
SCL0_B
IIC0
44
P407 / USB_VBUS
Main I²C Bus
SDA0_B
IIC0
Multiplexed
82
P304 / SCL9 / A09
Multiplexed
SCL6
SCI6
81
P305 / SDA9 / A10
Multiplexed
SDA6
SCI6
Figure 14. I²C bus diagram
As illustrated in
the IIC channel 0 is the board’s main I²C bus and is by default selected by the
resistor shunt SH39. The mikroBUS
TM
and the PMOD1 share the same I²C bus and is by default selected
with the SH25 and SH27 resistor shunts.
Mikrobus
CN12
0.3Mpx
CN9
Capacitive
CN8
EEPROM
U10
Audio
U11
Touchscreen
Camera
Codec
3-Axis
U12
MEMS
W : 0xA0
R : 0xA1
W : 0x30
R : 0x31
W : 0x32
R : 0x33
W : 0x42
R : 0x43
W : 0x70
R : 0x71
4K
7
4K
7
CN13
PMOD1
II
C
0
52
44
51
50
RA6M3
P204
P407
S
C
6
P204
P407
SDRAM
A09
A10
3V3D
R
69
4K
7
R
68
4K
7
R
75
R
76
3V3D
SH39
0R
SH25
0R
SH27
0R
SH26
0R
SH28
0R
SDA0_A
SCL0_A
SCL6
SDA6