FIGURE 2. PIN OUT ASSIGNMENTS
I2C/SPI#
ENIR#
NC
SDA
SCL
IRQ#
A1
A0
NC
RESET#
XR20M1280IL40
I2C Mode
RI#/GPIO3
GND
VCC_UART
GPIO15
GPIO14
GPIO13
GPIO4
GPIO5
GPIO6
GPIO7
S
LEEP
/PW
R
D
N
#
EN
485
#
GN
D
VC
C_
BU
S
GP
IO8
GP
IO9
GP
IO1
0
GP
IO1
1
GP
IO1
2
VC
C_
GP
IO
XT
AL
2
XT
AL
1
VC
C_
CO
RE
RX
TX
RTS
#
CTS
#
D
T
R#
/G
PI
O0
DS
R#
/G
PI
O
1
C
D
#/
GPI
O2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
30
29
28
27
26
25
24
23
22
21
40
39
38
37
36
35
34
33
32
31
VCC_BUS
I2C/SPI#
ENIR#
SO
GND
SCL
IRQ#
SI
CS#
NC
RESET#
XR20M1280IL40
SPI Mode
RI#/GPIO3
GND
VCC_UART
GPIO15
GPIO14
GPIO13
GPIO4
GPIO5
GPIO6
GPIO7
S
LEEP
/PW
R
D
N
#
EN
485
#
GN
D
VC
C_
BU
S
GP
IO8
GP
IO9
GP
IO1
0
GP
IO1
1
GP
IO1
2
VC
C_
GP
IO
XT
AL
2
XT
AL
1
VC
C_
CO
RE
RX
TX
RTS
#
CTS
#
D
T
R#
/G
PI
O0
DS
R#
/G
PI
O
1
C
D
#/
GPI
O2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
30
29
28
27
26
25
24
23
22
21
40
39
38
37
36
35
34
33
32
31
GND
I2C/SPI#
ENIR#
NC
SDA
SCL
IRQ#
A1
A0
XR20M1280IL32
I2C Mode
DSR#/GPIO1
CD#/GPIO2
RI#/GPIO3
VCC_UART
GPIO4
GPIO5
GPIO6
GPIO7
R
ESET
#
SLE
EP/
PW
R
D
N
#
EN
48
5#
GND
V
CC_
BU
S
NC
VC
C
_GPI
O
XT
AL
2
XT
AL
1
V
CC_
CO
RE
RX
TX
RT
S#
CT
S#
DT
R#/
G
P
IO0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
VCC_BUS
I2C/SPI#
ENIR#
SO
GND
SCL
IRQ#
SI
CS#
XR20M1280IL32
SPI Mode
DSR#/GPIO1
CD#/GPIO2
RI#/GPIO3
VCC_UART
GPIO4
GPIO5
GPIO6
GPIO7
R
ESET
#
SLE
EP/
PW
R
D
N
#
EN
48
5#
GND
V
CC_
BU
S
NC
VC
C
_GPI
O
XT
AL
2
XT
AL
1
V
CC_
CO
RE
RX
TX
RT
S#
CT
S#
DT
R#/
G
P
IO0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
GND
NC
SDA
SCL
IRQ#
A1
A0
XR20M1280
IL24
I2C Mode
CD#/GPIO2
RI#/GPIO3
VCC_UART
RTS#
RX
TX
R
ESET
#
S
LE
EP/
PW
R
D
N
#
GND
V
CC_
BU
S
EN
48
5#
CTS
#
I2
C/
SP
I#
XT
AL2
XT
AL1
VC
C_
C
O
RE
D
T
R
#/
GPI
O0
DS
R
#
/G
PIO
1
2
3
4
5
6
7
8
9
10
11
12
18
17
16
15
14
13
24
23
22
21
20
19
VCC_BUS
SO
GND
SCL
IRQ#
SI
CS#
XR20M1280
IL24
SPI Mode
CD#/GPIO2
RI#/GPIO3
VCC_UART
RTS#
RX
TX
R
ESET
#
SLE
EP/
PW
R
D
N
#
GN
D
V
CC_
BU
S
EN
48
5#
CTS
#
I2
C
/SP
I#
XT
AL
2
XT
AL
1
V
CC_
CO
RE
DT
R#
/G
PI
O
0
D
SR
#/
GPI
O1
1
2
3
4
5
6
7
8
9
10
11
12
18
17
16
15
14
13
24
23
22
21
20
19
GND
XR20M1280
3
REV. 1.0.0
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS