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STPM34 bảng dữ liệu(PDF) 66 Page - STMicroelectronics

tên linh kiện STPM34
Giải thích chi tiết về linh kiện  ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STPM34 bảng dữ liệu(HTML) 66 Page - STMicroelectronics

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Theory of operation
STPM32, STPM33, STPM34
66/121
DS10272 Rev 8
Figure 47. Startup interface selection timing
After the selected communication interface is established, the interface is locked to prevent
the communication method from changes, and SCS pin is used as chip-select for the
device.
Pins used by the serial communication peripheral are listed in Table 23.
Table 23. Communication pin description
Name
Function
SPI connection
UART connection
SYN
Synchronization GPIO (optional), VCC at startup GPIO (optional), VCC at startup
SCS
Chip-select
-Start-up interface selection at
GND
-Chip-select at GND
-Start-up interface selection at
VCC
-Chip-select at VCC
SCL
Clock
SPI CLK
Not used
MOSI/RXD Data in
SPI MOSI
UART RX
MISO/TXD Data out
SPI MISO
UART TX



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