ax5051 AXSEM, ax5051 Datasheet - Page 8

• Manufacturer Part Number: ax5051
• Description: Ax5051 Radio
• Manufacturer: AXSEM

8
Pin Function Descriptions
3.
Symbol
NC
VDD
GND
ANTP
ANTN
GND
VDD
NC
TST1
TST2
GND
RESET_N
SYSCLK
SEL
CLK
MISO
MOSI
TST3
IRQ
VDD_IO
NC
GND
NC
VREG
NC
VDD
CLK16P
CLK16N
A =
I
O =
All digital inputs are Schmitt trigger inputs, digital input and output levels are LVCMOS/LVTTL compatible and 5V
tolerant
The centre pad of the QFN28 package should be connected to GND.
Version 1.6
=
analog signal
digital input signal
digital output signal
Pin Function Descriptions
.
Pin(s)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
Type
I/O
I/O
O
N
A
A
N
N
N
N
A
A
P
P
P
P
P
P
P
P
P
I
I
I
I
I
I
I
Description
Not to be connected
Power supply, must be supplied with regulated voltage VREG
Ground
Antenna input/output
Antenna input/output
Ground
Power supply, must be supplied with regulated voltage VREG
Not to be connected
Must be connected to GND
Must be connected to GND
Ground
Optional reset pin
If this pin is not used it must be connected to VDD_IO
Default functionality: Crystal oscillator (or divided) clock output
Can be programmed to be used as a general purpose I/O pin
Serial peripheral interface select
Serial peripheral interface clock
Serial peripheral interface data output
Serial peripheral interface data input
Must be connected to GND
Default functionality: Transmit and receive interrupt
Can be programmed to be used as a general purpose I/O pin
Unregulated power supply
Not connected
Ground
Not to be connected
Regulated output voltage
VDD pins must be connected to this supply voltage
A 1µF low ESR capacitor to GND must be connected to this pin
Not to be connected
Power supply, must be supplied with regulated voltage VREG
Crystal oscillator input/output
Crystal oscillator input/output
I/O
N
P
=
=
=
digital input/output signal
not to be connected
power or ground
Datasheet AX5051