User's Manual

Page4
Serial Peripheral Interface
Clock
10 PIO6 Bi-directional
Programmable Input/Output
Line 6
Chip Select For Synchronous
Serial Interface
11 GND GND Ground
12 GND GND Ground
13 PIO7 Bi-directional
Programmable Input/Output
Line 7
Serial Peripheral Interface
Data Input
14 PIO8 Bi-directional
Programmable Input/Output
Line 8
Serial Peripheral Interface
Data Output
15 PIO9 Bi-directional
Programmable Input/Output
Line 9
16
VDD_I
O
Power
Positive supply for all digital
I/O port
17 PIO10 Bi-directional
Programmable Input/Output
Line 10
18 PIO11 Bi-directional
Programmable Input/Output
Line 11
19
SPI_PI
O#_SEL
Input
Selects spi debug ( Input with
strong internal Pull-down)
20 WAKE Input
Input to wake csr1000 QFN
from hibernate (input has no
internal pull-up or pull-down,
Use external pull-down)
21 VBAT Power Battery input
22 GND GND Ground
2.2 The RF receiving IC
The CMT2210LH typical application schematic:
RF receiving IC demodulates the information received from the outside world and supplies it to the
MCU for judgment execution.The CMT2210LH is an all-in-one receiver with a digital-analog hybrid