S50 Hardware User Guide
1VV0301505 Rev. 3
Page 43 of 60
2021-05-05
Not Subject to NDA
8.
APPLICATION DIAGRAM
Figure 29 shows a typical application of S50. The module is connected to some
MCU running the application layer. MCU and S50 use the same 3,3V power
supply. The serial interface has RTS/CTS flow control and UICP support in this example.
The optional hangup feature to close down the link is provided.
All other module pins may be left unconnected.
Host MCU
VDD
GND
+3V3
GPIO (o)
In this example S50/AI is connected to an MCU supporting UICP, RTS/CTS flow control and Hangup.
S50/AI
E-6,F-6
VSUP
B-1 EXT-RES#
UART-RXD
UART-TXD
UART-CTS#
UART-RTS#
GPIO[4]/Hangup
TXD (o)
RXD (i)
RTS# (o)
CTS# (i)
GPIO (o)
B-4
D-4
all GND pads (14) must be connected.
Blocking capacitors not shown.
pushpull or OD
pushpull
D-2
F-4
F-3
D-7
IUR-IN#
D-5
IUR-OUT#
GPIO/DTR# (o)
GPIO/DSR# (i)
Figure 29: Typical Application Schematics
