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4
9152BINDCO02/10
ATA8743
2.   Pin Configuration
Figure 2-1.    Pinning QFN24 5 mm x 5 mm 
B3/RESET
PB2
PA7
PB1
PB0
VCC
PA3/T0
PA4/USCK
PA5/MISO
PA2
PA1
PA0
24
4
3
6
5
2
1
15
16
13
14
17
18
23  22  21  20  19
7    8    9   10  11  12
Table 2-1.
Pin Description
Pin
Symbol
Function
1
VCC
Microcontroller supply voltage
2
PB0
Port B is a 4-bit bi-directional I/O port with internal pull-up resistor
3
PB1
Port B is a 4-bit bi-directional I/O port with internal pull-up resistor
4
PB3/RESET    Port B is a 4-bit bi-directional I/O port with internal pull-up resistor/reset input
5
PB2
Port B is a 4-bit bi-directional I/O port with internal pull-up resistor
6
PA7
Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
7
PA6 / MOSI    Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
8
CLK
Clock output signal for microcontroller. The clock output frequency is set by the crystal to f
XTAL
/4
9
PA_ENABLE   Switches on power amplifier. Used for ASK modulation
10
ANT2
Emitter of antenna output stage
11
ANT1
Open collector antenna output
12
GND
Ground
13
PA5/MISO
Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
14
PA4/SCK
Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
15
PA3/T0
Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
16
PA2
Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
17
PA1
Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
18
PA0
Port A is a 4-bit bi-directional I/O port with internal pull-up resistor
19
GND
Microcontroller ground
20
XTAL
Connection for crystal
21
VS_RF
Transmitter supply voltage
22
GND_RF
Transmitter ground
23
ENABLE
Enable input
24
GND
Ground
GND
Ground/backplane (exposed die pad)
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