Data Sheet

FSC-BT691 Datasheet
Shenzhen Feasycom Technology Co.,Ltd www.feasycom.com
-4-
integrating a 2.4 GHz transceiver and an ARM® Cortex-
M0+TM microcontroller with a RAM of 48 kB and a
One-Time Programmable (OTP) memory of 32 kB.
It can be used as a standalone application processor or as
a data pump in hosted systems.
Very low active RF, MCU current and low-power mode
current consumption provide excellent battery lifetime
and allow for operation on small coin cell batteries and in
energy-harvesting applications.
The BLE firmware includes the L2CAP service layer
protocols, Security Manager (SM), Attribute Protocol
(ATT), the Generic Attribute Profile (GATT), and the
Generic Access Profile (GAP). All profiles published by the
Bluetooth® SIG as well as custom profiles are supported.
The device is suitable for disposables, wireless sensor
nodes, beacons, proximity tags and trackers, smart HID
devices (stylus, keyboards, mice, and trackpads), toys,
and medical and industrial applications.
Features
2.4-GHz RF Transceiver Compatible With Bluetooth
Low Energy (BLE) 5.1
Supports up to three BLE connections
Typical cold boot to radio active 35 ms
16 MHz 32-bit ARM® Cortex-M0+ with
SWD interface
Dedicated Link Layer Processor
AES-128 Encryption Processor
32 kB One-Time-Programmable (OTP)
48 kB Retainable System RAM
144 kB ROM
Clock-less hibernation mode: 270 nA
10-bit ADC for battery voltage monitoring
Built-in temperature sensor for die temperature
monitoring
TX: 3.5 mA, RX: 2.2 mA (system currents
with DC-DC, VBAT_HIGH =3 V and 0 dBm)
Programmable transmit output power from
-19.5 dBm to +2.5 dBm
-94 dBm receiver sensitivity
Support SPI, UART, I2C interface
Support the OTA upgrade
Wide Operating Voltage Range:1.65V to 3.6V
Operating Temperature: -40°C to +85°C
Application
Medical applications
Disposables
Beacons
Proximity tags and trackers
Smartwatches
Human interface devices (HID)
Industrial appliances
Module picture as below showing
Figure 1: FSC-BT691 Picture