C027-U20/C20/G35 - User Guide
Starting up
UBX-13004386 - R01
Objective Specification
Page 5 of 10
1.1
C027-U20/C20/G35 pin definition
GND
GND
5.0v
3.3v
nR
IOREF
VIN
7v - 17v In
0v
0v
5.0v Regulated Out
3.3v Regulated Out
3.3v Regulated Out
AnalogIn
AnalogOut
P0_23
P0_24
P0_25
P0_26
P1_30
P1_31
I2S
clk
ws
sda
Serial
tx
rx
PwmOut
PwmOut
P2_0
P2_13
P4_28
P4_29
P2_1
P2_12
P2_11
P2_2
I2C
scl
sda
SPI
sck
miso
mosi
ssel
GND
0v
PwmOut
P2_4
P2_3
P1_21
P1_24
P1_23
P1_20
P0_0
P0_1
AREF
P0_5
P0_4
GND
CAN
P0_19
P0_20
P0_21
P0_22
P0_17
P0_18
P0_15
P0_16
D+
D-
USB
P2_7
P2_8
P2_9
P2_5
P2_6
3.8v LDO
en
P1_18
P1_19
P1_22
P0_10
P0_11
P0_27
P0_28
P1_22
GNSS
Receiver
Serial
I2C
sda
scl
tx
rx
sda
scl
tx
rx
rst
pps
int
3.3v LDO
en
GNSS
Antenna
RF In / 3.3v DC Out
Cellular
Antenna
Ethernet
7v -17 v DC In USB CMSIS-DAP
P0_6
C027-C20/U20/G35
www.u-blox.com
Reset _N Open Drain
P3_25
LED1
P0_7
GNSS Antenna
Cellular Antenna
u-blox
Cellular
Modem
Serial
tx
rx
cts
dcd
dsr
dtr
ri
rts
tx
rx
cts
dcd
dsr
dtr
ri
rts
ni
rst
pwron
D+
D-
usbdet
usbcon
P0_8
i2c
P0_9
gpio / uart
Output enable for modem level shifters
Figure 1: C027-U20/C20/G35 pin definition