Data Sheet

Bluetooth Module Datasheet
Model: BLELED
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SKB360-DA-001,A/4
5 Interfaces
5.1 Power Supply
Regulated power for the BLELED is required. The input voltage Vcc range should be 1.8V to 3.6V, current is not
less than 20mA. Suitable decoupling must be provided by external decoupling circuitry (10uF and 0.1uF). It can
reduce the noise from power supply and increase power stability.
5.2 System Function Interfaces
5.2.1 GPIOs
The general purpose I/O is organized as one port with up to 20 I/Os enabling access and control of up to 20 pins
through one port. Each GPIO can be accessed individually with the following user configurable features:
1、Input/output direction
2、Output drive strength
3、Internal pull-up and pull-down resistors
4、Wake-up from high or low level triggers on all pins
5、Trigger interrupt on all pins
6、All pins can be used by the PPI task/event system; the maximum number of pins that can be interfaced through
the PPI at the same time is limited by the number of GPIOTE channels
7、All pins can be individually configured to carry serial interface or quadrature demodulator signals
8、All pins can be configured as PWM signal.
9、There are 4 ADC/LPCOMP input in the 20 I/Os.
5.2.2 Two-wire Interface (I2C Compatible)
The two-wire interface can communicate with a bi-directional wired-AND bus with two lines (SCL, SDA). The
protocol makes it possible to interconnect up to 127 individually addressable devices. The interface is capable of
clock stretching, supporting data rates of 100 kbps and 400 kbps. The module has 2 TWI ports and they
properties like following table.
Instance
Master/Slave
TWI0
Master
TWI1
Master
Table5-1: TWI Pin Share Scheme