Dual-Channel Sigma-Delta Modulators Stpms2L; Stpms2L Presentation; Table 30. Cn13 Nfc Connector Terminal Assignment - STMicroelectronics STM32L476G-EVAL User Manual

UM1855
Table 30
The serial communication with the module plugged in CN13 can either use SPI
communication protocol (default) or UART communication protocol.
CN13
terminal
1
2
3
4
5
6
7
8
2.29

Dual-channel sigma-delta modulators STPMS2L

2.29.1

STPMS2L presentation

With its DFSDM interface, the STM32L476ZGT6 microcontroller can directly interact with
sigma-delta modulator devices, such as STPMS2L.
STPMS2L comprises two analog measuring channels based on second-order sigma-delta
modulators. Typically, it can be used in power metering where both voltage and current
need to be known. One channel measures the voltage, the other channel measures the
current.
DAT port outputs converted measurement data on the DFSDM_DATIN1 line, received by
the STM32L476ZGT6 DFSDM controller. The data from STPMS2L are synchronized with
DFSDM_CKOUT clock generated by the STM32L476ZGT6 DFSDM controller and received
on CLK terminal of STPMS2L.
There are two STPMS2L devices on STM32L476G-EVAL, sharing the DFSDM clock. One is
wired such as to support a power-metering demonstrator. The other allows measuring
temperature using the PT100 sensor.
shows the assignment of signals to CN13 connector.

Table 30. CN13 NFC connector terminal assignment

NFC line name
NFC_IRQOUTN or
UART_TX
NFC_IRQINN or
UART_RX
NFC_NSS
NFC_MISO
NFC_MOSI
NFC_SCK
+3V3
GND
DocID027351 Rev 3
Hardware layout and configuration
MCU port
Interrupt output for NFC device
PB7
Connected to STM32L476ZGT6 UART RX
Interrupt input for NFC device
PB6
Connected to STM32L476ZGT6 UART TX
PF11 SPI slave select
PB14 SPI data, slave output
PB15 SPI data, slave input
PB13 SPI serial clock
- Main power supply/power supply for RF drivers
- Ground
Function
51/100
99