DeLOCK 12951, Руководство пользователя

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-3-
2 M1
Input
（
weak pull-up
）
Work with M0 to decide 4 working modes of module (not suspended, if
not used, could be grounded).
3 RXD Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can
be configured as open-drain or pull-up input.
4 TXD Output TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can
be configured as open-drain or push-pull output
5 AUX Output
To indicate module ’ s working status & wakes up the external MCU.
During the procedure of self-check initialization, the pin outputs low
level. Can be configured as push-pull output (suspending is allowed).
6 VCC Input
Power supply
：
2.3~ 5.2V DC
7 GND Input Ground
8 Fixed orifice - Fixed orifice
9 Fixed orifice - Fixed orifice
10 Fixed orifice - Fixed orifice
3. Connect to MCU
No.
Description
（
STM8L MCU
）
1 The UART module is TTL level.
2 For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.