Hardware specification

SP1ML

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DocID026906 Rev 4

1.6

Pin assignment

Table 6. Pin assignment

Pin

Name

Type

Description

1

TXRXLED

O

PA2

2

SHDN

I

Shutdown

PA0

3

GPIO0

I/O

PB15

4

GPIO1

I/O

PB14

5

MODE0

I

PB13

6

MODE1

I

PB12

7

VDD

Power

Supply input voltage

-

8

GND

Power

Ground

-

9

SWDIO

I/O

Serial wire I/O

PA13

10

SWCLK

I

Serial wire clock

PA14

11

BOOTMODE

I

Boot mode selection

BOOT0

12

RESET

I

Reset input, active low

NRST

13

TXD

O

UART transmit data

PA9

14

RXD

I

UART receive data

PA10

15

GPIO2

I/O

PB6

16

GPIO3

I/O

PB7

1.

For further details, see the STM32L151RB datasheet, Pin descriptions section. Alternate functions of any given pin are

dependent on the user application firmware that is loaded into the module and is beyond the scope of this document.

2.

Refer to Hardware design section for details regarding TXRXLED and protocol mode selection.

3.

The GPIO signals are not used by the default firmware integrated in the module. They are accessible with user application

firmware. See note 1.