The STCOM is a device that integrates a power line communication (PLC) modem and a high-performance application core.
The PLC modem architecture has been designed to target the EN50065, FCC, ARIB compliant PLC applications. Together with the application core, it enables the STCOM to support the ITU-T G.9001, ITU-T G.9903 (G3-PLC®), ITU-T G.9904 (PRIME), IEEE 1901.2, IEC 61334-5-1 (G1), CLC/TS 50568 (METERS AND MORE®) and other narrow band PLC protocol specifications.
The STCOM basic block diagram is shown in Figure 1.
**Key Features**
Integrated differential PLC analog front-end
PGA with automatic gain control and ADC
Current DAC with transmission predriver
Digital transmission level control
Zero crossing comparator
Up to 500 kHz PLC signal bandwidth
Integrated dual line driver
14 V p-p single ended, 28 V p-p differential output range
Very high linearity for EMC compliance
Externally configurable amplifier topology
1 A rms max. current
Embedded overtemperature protection
Suitable for all PLC signals up to 500 kHz
Fully reprogrammable real-time engine (RTE) modem for PLC standards up to 500 kHz
Integrated application core: ARM® 32-bit Cortex™-M4F CPU
96 MHz maximum frequency
8-channel direct memory access controller
8-region memory protection unit
Serial wire and JTAG interfaces
Cortex-M4 Embedded Trace Macrocell™
Up to 86 multiplexed GPIOs
11 timers
1 flexible CRC calculation unit
5 USARTs (ISO 7816 compliant), 5 SPI, 3 I2 C
12-bit general purpose ADC with 6 channels
Cryptographic engine
AES 128/192/256 engine
True random number generator
Memories
640 kB or 1 MB of embedded Flash
128 kB of embedded SRAM
8 kB of embedded shared RAM
Flexible static memory controller
Clock management
24 MHz external crystal for system clock with internal QFS synthesizer
32.768 kHz external crystal for RTC
Power management
3.3 V and 8 - 18 V external supply voltages
1.2 V and 5 V integrated linear regulators
Normal and low power modes
Real-time clock (RTC)
VBAT supply with battery health monitoring for RTC and backup registers