LEXI-R422 - System integration manual
UBX-23007449 - R02
System description
Page 11 of 108
C1-Public
Function Name
No
ID
I/O Description
Remarks
I2C
SCL
12
N1
O
I2C bus clock line Fixed open drain, to communicate with I2C devices.
Internal pull-up to V_INT: no need external pull-up.
See section
for functional description.
See section
for external circuit design-in.
SDA
13
P1
I/O I2C bus data line Fixed open drain, to communicate with I2C devices.
Internal pull-up to V_INT: no need external pull-up.
See section
for functional description.
See section
for external circuit design-in.
GPIO
GPIO1
14
R2
I/O GPIO
Pin with alternatively configurable functions.
See section
for functional description.
See section
for external circuit design-in.
GPIO2
15
R3
I/O GPIO
Pin with alternatively configurable functions.
See section
for functional description.
See section
for external circuit design-in.
GPIO3
16
R4
I/O GPIO
Pin with alternatively configurable functions.
See section
for functional description.
See section
for external circuit design-in.
GPIO4
17
R5
I/O GPIO
Pin with alternatively configurable functions.
See section
for functional description.
See section
for external circuit design-in.
GPIO5
18
R6
I/O GPIO
Pin with alternatively configurable functions.
See section
for functional description.
See section
for external circuit design-in.
GPIO6
29
M15
I/O GPIO
Pin with alternatively configurable functions.
See sections
for functional description.
See sections
for external circuit design-in.
Antenna
tuning
RFCTRL1
45
A9
O
RF GPIO for
antenna tuner
Optional output for antenna dynamic tuning.
See section
for functional description.
See section
for external circuit design-in.
RFCTRL2
44
A10
O
RF GPIO for
antenna tuner
Optional output for antenna dynamic tuning.
See section
for functional description.
See section
for external circuit design-in.
Reserved RSVD
2,23-26,
28,34,35,
36-38,
39,46,47,
48,54,55,
62,63,71,
72,80,81,
89,90,98,
107,108
C1,R11-14,
N15,G15,F15,
E15,D15,C15,
B15,A8,A7,
A6,C5,C6,
E3,E5,F3,
F5,G3,G5,
H3,H5,J3,
K3,K5
N/A Reserved pin
Leave unconnected.
See sections
RSVD
99
J5
N/A Reserved pin
Provide test point for diagnostic purposes.
See sections
Table 3: LEXI-R422 modules pin definition, grouped by function
