Data Sheet

casambi.com
3
1. Operation
Casambi CBM-003B/C is an embedded wireless
module with a powerful 32-bit ARM® Cortex® -M4
CPU and a 2.4 GHz transceiver with an onboard
antenna. It can be integrated, for example, into an
LED driver, a light fixture, LED bulb, or any sensor.
The CBM-003B/C has a total of 12 GPIO pins,
which can be configured to perform various tasks,
such as SPI, TWI (I2C compatible), UART, 8 PWM
outputs, and 4 channel Analog-to-Digital Converter
input. ADC input channels have fixed GPIO pins.
Other functions can be configured to any free GPIO
pin. Note: The CBM-003B/C is based on nRF52840
chip, which has some limitations compared to earlier
models. Many of nRF52840 pins are recommended
to be used only in standard-drive (2 mA) and
low-frequency (≤10kHz) mode. CBM-003B/C has
6 standard and 6 High-drive GPIOs.
All >10KHz and High-drive IOs shall be connected to
High-drive pins, otherwise radio performance may be
compromised.
The CBM-003B/C has an integrated 2.4 GHz antenna,
so this will have to be considered when the device
is integrated into any environment. See chapter 7
for further instructions.
Many of the CBM-003B/C's different settings can be
configured in the Casambi Admin webtool and taken
into use without the need of re-programming the
module. These settings include, for example, I/O
pin mapping, PWM, and push-buttons.
The Casambi CBM-003B/C is based on the Nordic
Semiconductor nRF52840 chip, and all technical data
shall be referred to regarding the chip's datasheet.
2. Block Diagram
CBM-003B block diagram
Crystal,
32 MHz
Matching
network
32 bit Cortex M4
RF-MCU
VCC
GND
GPIO0
GPIO11
SWDCLK
SWDIO