Data Sheet

Table Of Contents

RM1xx LoRa/BLE Modules

Datasheet

https://connectivity.lairdtech.com/wireless-

modules/lorawan-solutions

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Parameter Min Typical Max Unit

RX only ‘peak’ current

11.9

Ultra Low Power Mode1 (Note 2)

Standby Doze

4.2

Ultra Low Power Mode2 (Note 3)

Deep Sleep (no RAM retention)

750

Active Mode Average current (Note 4)

Connection Average Current draw

Max with connection interval (min) 7.5 mS

with connection interval 67.5 mS

Min with connection interval (max) 4000 mS

~400

~2.6-4.1

Note 1: If VCC is below 2.1V (operating range of DCDC), the peak current consumption will increase because the DCDC

converter is switched off and the internal LDO is enabled.

Note 2: Standby Doze is entered automatically (when waitevent statement is encountered within a smartBASIC

application script). See individual peripherals current consumption in tables in section Peripheral block current

consumption 4.3.

Note 3: In Deep Sleep, everything is disabled and the only wake-up sources are reset and changes on pins on which

sense is enabled. A reset is required to exit Deep Sleep.

Note 4: Data taken with TX power 3 dBm and all peripherals off (UART OFF after radio event). Average current

consumption depends on a number of factors (including TX power, VCC and accuracy of 16 MHz and 32.768

kHz crystals). With these factors fixed, the largest variable is the connection interval.

Connection Interval Range:

7.5 ms to 4000 ms in multiples of 1.25 ms.

For a connection event:

– The minimum average current consumption is when the connection interval is large 4000 mS

– The maximum average current consumption is with the shortest connection interval of 7.5 ms; no slave

latency.

Other factors that are also related to average current consumption include whether transmitting 6 packets per

connection interval & each packet contains 20 bytes (which is the maximum for each packet) and an

inaccurate 32 kHz master clock accuracy would increase the average current consumption.

3.3.6.1 BLE Measured Peak Current Waveforms during Connection

Figure 5 illustrates BLE current waveforms observed as the RM1xx module performs a transmit/receive cycle with Vcc =

3.3V. The plot was made using a shunt current sensor and the voltage waveform has been manually converted to current.

The current represented is the total module current which is the sum of the BLE_VCC and BLE_LORA pins.