Features
Hardware features
 ARM® Cortex® -M3 32-bit RISC core
 12 Kbytes of user RAM
 512 Kbytes of user Flash memory with OTP
area:
– 1 0-year data retention at 105 °C, or
17 years at 85 °C
– 500 000 Erase/Write cycles per page
– Page granularity of 128 Bytes

Description
The ST32GxxxA (see Table 1) is a serial access microcontroller designed for machine-to-machine (M2M) applications in the car environment that incorporates the most recent generation of ARM® processors for embedded systems. Its Cortex®-M3 32-bit RISC core operating at a 15-MHz frequency brings great performance and excellent code compacity to the application thanks to the Thumb®-2 instruction set.
The 512-Kbyte high-speed embedded Flash memory introduces more flexibility to the system. This Flash memory has an improved cycling capability compared to the ST32F512-M.
The ST32GxxxA also offers a serial communication interface fully compatible with the ISO/IEC 7816-3 standard (T=0, T=1).
Two general-purpose 16-bit timers are available.
A hardware Data Encryption Standard (DES) accelerator can be used to the user to optimize the application performance. A software library is provided for Advanced Encryption Standard (AES) implementation.
The ST32GxxxA operates in the –40 to +105 °C temperature range and 1.8 V, 3 V and 5 V supply voltage ranges. A comprehensive range of power-saving modes enables the design of efficient low-power applications.
– Block granularity: 1 Kbyte
– 128 bytes of OTP for user
– Page Erase time 4 ms
– Block Erase 1 Kbyte in 20 ms
– Programming performance up to
10 μs/byte
– Flash Erase / Write Protection software
programmable on 32 Kbyte sectors
 Asynchronous Receiver Transmitter
supporting ISO/IEC 7816-3 T=0 and T=1
protocols
 Two 16-bit timers with interrupt capability
 1.8 V, 3 V and 5 V supply voltage ranges
 External clock frequency from 1 up to 7.5 MHz
 High performance provided by:
– T ypical CPU clock frequency of 17.5 MHz
– External clock multiplier (2x, 3x, and 4x)
 Current consumption compatible with ETSI
specifications
 AECQ100 rev G automotive-grade compliance
 Power-saving Standby state
 Contact assignment compatible ISO 7816-2

 ESD protection greater than 4 kV (HBM)
 8-pin DFN (6 × 5 mm) ECOPACK® package
Security features
 Monitoring of environmental parameters
 Protection against faults
 ISO 3309 CRC calculation block
 True random number generator
 Unique serial number on each die
 Hardware data encryption standard (DES)
accelerator
Software features
 Flash memory loader
 Flash memory drivers
Development environment
 Software development and firmware
generation are supported by a comprehensive
set of development tools dedicated to software
design and validation:
– C compiler, simulator and emulator

Major applications
 eCalls
 Connected car
 Java Card™ applications