S42
Hardware User Guide
1VV0301303 Rev. 11
Page 39 of 85
2021-05-06
Not Subject to NDA
4.5.
Application Specific ADC/LUA Pin Configuration
Pin Types:
PU
–
pull-up; PD
–
pull-down; PWR
–
Power; I
–
Input; O
–
Output; I/O
–
bidir.; OD
–
open drain;
PP
–
push/pull; RF: RadioFreq; I-DIS
–
Disconnected; LFXO Low Frequency Crystal I/O
Pin Name
Signal
ADC/LUA
Function
Type
Act
Description
Note
E-6
VSUP1
Power
PWR
+3,0V nom.
F-6
VSUP2
Power
PWR
+3,0V nom
C-1
not connected
May be connected to VSUP
A-7,E-7,F-7,
B-[5,6,7,8],
C-[5,6,7,8],
D-8,E-8,F-8
GND
GND
PWR
Ground
All GND pins must be
connected
A-8
ANT PIN
none
leave open (reserved for ext.
antenna)
(4,9)
B-1
EXT-RES#
Reset
I-PU
L
User Reset
A-6
XL-IN/SLCK
SLCK / XTAL
LFXO
32,768kHz Slow Clock crystal
(optional, leave open without
crystal)
F-4
UART-TXD
TXD
O-PP
DIS
Serial Data OUT
(6)
D-2
UART-RXD
RXD
I
DIS
Serial Data IN
(6)
D-7
UART-RTS#
/RTS
O-PP
DIS
L
Flow Control; refer to
(1,6)
F-3
UART-CTS#
/CTS
I-PD
DIS
L
Flow Control; refer to
(6,8)
B-4
IUR-OUT#
DIS
L
(3,8)
D-5
IUR-IN#
DIS
L
(3,8)
D-3
GPIO[0]
I2C-SCL
O-
PU/OD
DIS
TWI Clock
(3)
B-2
GPIO[1]
AIN1
I2C-SDA
Analog
I/O-
PU/OD
DIS
Analog Input 1
TWI-SDA
(3)
D-1
GPIO[2]
SPI-MOSI
O-PP
DIS
SPI-MOSI
(3)
E-4
GPIO[3]
DIS
L
(3)
D-4
GPIO[4]
AIN2
DIO1
Analog
I/O
DIS
Analog Input 2
Digital In-/Output 1
(3)
F-2
GPIO[5]
SPI-MISO
I
DIS
SPI-MISO
(3)
C-4
GPIO[6]
AIN3
DIO2
I/O
DIS
Analog Input 3
Digital In/Output 2
(3)
