Gpio; Comparator - Globalstar ST150 User Manual

9150-0125-01 R-4
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.
Symbol
VIH Input High Voltage
VIL Input Low Voltage
VOH Output High Voltage
VOL Output Low Voltage
IOL,SD Current at VSS+0.4 V, output set low, standard drive
IOL,HDH Current at VSS+0.4 V, output set low, high drive
IOH,SD Current at VDD-0.4 V, output set high, standard drive 1
IOH,SD Current at VDD-0.4 V, output set high, high drive
RPU Internal Pull-up Resistance
RPD Internal Pull-down Resistance
4.2.2

Comparator

The comparator (COMP) compares an input voltage (VIN+) against a second input voltage (VIN-). VIN+ can be
derived from an analog input pin (AIN0-AIN7). VIN- can be derived from multiple sources depending on the
operation mode of the comparator.
Main features of the comparator are:
• Input range from 0 V to VDD
• Single-ended mode
• Fully flexible hysteresis using a 64-level reference ladder
• Differential mode
• Configurable 50 mV hysteresis
• Reference inputs (VREF): VDD
• External reference from AIN0 to AIN7 (between 0 V and VDD)
• Internal references 1.2 V, 1.8V and 2.4V
• Three speed/power consumption modes: low-power, normal and high-speed
• Single-pin capacitive sensor support
• Event generation on output changes
• UP event on VIN- > VIN+
• DOWN event on VIN- < VIN+
• CROSS event on VIN+ and VIN- crossing
• READY event on core and internal reference (if used) ready
ST150M User Manual
Description
Confidential & Proprietary Information
Min Typ Max
0.7VDD – VDD
VSS – 0.3VDD V
2.9 – VDD
VSS – 0.4
1 2 4
6 10 15
2 4
6 9 14
11 13 16
11 13 16
Units
V
V
V
mA
mA
mA
mA
kOhm
kOhm
19