4
2. Hardware Description
(1)
MDBT42Q-AT BLE module based on nRF52810.
(2)
32.768KHz crystal for external LF.
(3)
10uH & 15nH inductor for DC-to-DC mode.
(4)
Interface to connect to external MCU.
(5)
ADC input for battery detection only. Reference voltage is 0.6V.
Example:
formula
: Input Voltage
×
𝑅1
𝑅1 +𝑅2
= Reference Voltage
→ 3.3V ×
180
820 + 180
= 0.594 ≈ 0.6V
(6)
UART interface for data bridge or AT commands.
(7)
Wake-up key.
Summary of Contents for MDBT42Q-AT-UART-S
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