User's Manual

EH-MC30
Ehong
®
Professional Bluetooth Solutions Provider page 9 of 17
-
Figure 2： Power Supply PCB Design
6.2. PIO
The general purpose I/O is organized as one port with up to 19 I/Os (dependent on package)
enabling access and control of up to 19 pins through one port. Each GPIO can be accessed
individually with the following user configurable features:
 Input/output direction
 Output drive strength
 Internal pull-up and pull-down resistors
 Wake-up from high or low level triggers on all pins
 Trigger interrupt on all pins
 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. All pins can be individually configured to carry serial
interface or quadrature demodulator signals.
6.3. AIO
The 10 bit incremental Analog to Digital Converter (ADC) enables sampling of up to 8 external
signals through a front-end multiplexer. The ADC has configurable input, reference presaging,
and sample resolution (8, 9, and 10 bit)
6.4. PWMs
The module has 4 independently configurable PWM instances.
6.5. UART
The module has 1 UART interface. The Universal Asynchronous Receiver/Transmitter offers
fast, full-duplex, asynchronous serial communication with built-in flow control (CTS, RTS)
support in hardware up to 1Mbps baud. Parity checking is supported. The GPIOs used for each
UART interface line can be chosen from any GPIO on the device and are independently
configurable. This enables great flexibility in device pinout and efficient use of board space and
signal routing.