Application Note
7 of 19
002-27376 Rev. *A
2021-06-15
Getting Started with CXPI Transceiver S6BT112A
Hardware configuration
shows circuit connection of slave nodes (this example uses PSoC 4).
220 pF
+5 V or +3.3 V
S6BT112A
RXD
NSLP
CLK
TXD
SELMS
BAT
BUS
GND
1
2
3
4
8
7
6
5
GND
R3
+B
BUS
GND
GND
GND
GND
10 k
Ω
10 µF
10 k
Ω
0.1 µF
GND
PSoC4100S
Plus
VDD
GND
P1.0/
uart_rx
P0.1/
in_n
P3.0/
io
P1.1/
uart_tx
R4
R2
10 k
Ω
D1
Figure 3
Connection example of slave node configured with PSoC 4 and S6BT112A
In case of adding the secondary clock master operation, the SELMS pin must be connected to the GPIO of the
MCU in addition to being pulled up. When switching to the secondary clock master operation in the power on
state, make sure that the NSLP pin is set to LOW and transition to the Sleep mode, and after confirming that
there is no communication such as Wakeup pulse on the BUS at the CLK pin, switch the SELMS pin to LOW.
Input the baud rate clock to the CLK pin.
