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9150-0125-01 R-1
4. PERIPHERALS
4.1 NEAR-FIELD COMMUNICATION (NFC)
There are two GPIO pins (P0.09/NFC1 and P0.10/NFC2) on the ST150M that can be configured to be a NFC listening device.
The operating frequency is 13.56MHz and the bit rate is 106kbps.
There are many NFC antennas on the market, but one that's been tested with the ST150M is Nordic
Semiconductor's flex PCB NFC antenna. More details can be found on Nordic's website. When doing PCB layout, the NFC
traces should be routed as a differential pair.
4.2 GPIO PIN PERIPHERALS
The following GPIO pins can be configured to whatever Nordic processor peripheral is desired. The peripherals are listed below
and go into some detail.
P0.02/AIN0
P0.03/AIN1
P0.04/AIN2
P0.05/AIN3
P0.28/AIN4
P0.29/AIN5
P0.30/AIN6
P0.31/AIN7
P0.09/NFC1
P0.10/NFC2 P0.16
P0.24
P0.25
P1.01 P1.02 P1.03
P1.04
P1.05
P1.06
P1.07
P1.10
P1.12
P1.14
P1.15
4.2.1 GPIO
GPIO has the following user-configurable features:
•
Configurable output drive strength
•
Internal pull-up and pull-down resistors
•
Wake-up from high or low level triggers on all pins
•
Trigger interrupt on state changes on any pin
•
All pins can be used by the PPI task/event system
•
One or more GPIO outputs can be controlled through PPI and GPIOTE channels
•
All pins can be individually mapped to interface blocks for layout flexibility
•
GPIO state changes captured on SENSE signal can be stored by LATCH register
•
An event can be generated in each GPIO based on a rising edge, falling edge, or any changing edge.
ST150M User Manual
Confidential & Proprietary Information
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