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                                                 SieMo S50037 Data Book 

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figure 10 SieMo Pinout, bottom view

Row X,D,E and F are by default not provided with soldering bumps

Pin Name

Type

Pin Description

RF
ANT

Rf in/out

T2

Antenna output, 50Ω; unconditionally
stable; DC path to GND

TX-EN

CMOS output,

pulled down

F5

Control output for external switch or PA

RX-EN

CMOS output

pulled down

F4

7

Control output for external switch or LNA

TX-PWR

Analogue output

F6

7

Ramping control output for external PA,
need not be used, ramping is done on the
module.

Power
V

CC

Power

C6

Power Supply 3.25-6V

V

CC

-

IO

Power

C4

Power Supply for all IO-Pins, 3.0-3.4V, can
be connected to V

REG

UART-Interface
TxD

CMOS output, 

5V

tolerant, pulled down

B5

UART data output

RxD

CMOS input, 

5V

tolerant, pulled down

A5

UART data input

RTS

CMOS input

A6

UART Ready To Send

CTS

CMOS output

B6

UART Clear To Send

N.C.
not connected

not connected

X1-X6,F2,F3

Do not connect. 

Will be

used in future versions.

not connected

not connected

C2,C3,C5, R4-6,T4-T6 Do not connect.

                                                

7

 No Bump