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ST33GxxxA
Secure MCU with 32-bit ARM® SecurCore® SC300™ CPU,
SWP interface and high-density Flash memory, automotive grade
Data brief
Security features
 Active shield
 Memory protection unit (MPU)
 Monitoring of environmental parameters
 Protection against faults
 16- and 32-bit CRC calculation block (ISO
13239, IEEE 802.3, etc.)
DFN8 6 × 5 mm
Features
 True random number generator
Hardware features
 Hardware security-enhanced DES accelerator

ARM®
 Unique serial number on each die
SecurCore®
SC300™ 32-bit RISC core
cadenced at 25 MHz
 30 Kbytes of user RAM
 Up to 1280 Kbytes of user Flash memory with
OTP area
 Asynchronous receiver transmitter supporting
ISO/IEC 7816-3 T=0 and T=1 protocols (Slave
mode supported)
 Hardware security-enhanced AES accelerator
 NESCRYPT coprocessor for public key
cryptography algorithm
Applications
Major ST33G1M2A applications include:
 Mobile communications (Automotive grade)
 Java Card™ applications
 Single wire protocol (SWP) interface for
communications with NFC router (ETSI
102-613 compliant)
 AECQ100 compliant
Table 1. Device summary
 Serial peripheral interface (SPI) master/slave
interface
Part number
Memory size in Kbytes
 Three 16-bit timers with interrupt capability
ST33G1M2A
1280
 Seven general-purpose I/Os enabling
proprietary protocol implementation
ST33G1M0A
1024
ST33G896A
896
 1.8 V, 3 V and 5 V supply voltage ranges
ST33G768A
768
 External clock frequency from 1 up to 10 MHz
 Current consumption compatible with GSM
and ETSI specifications
 Power-saving standby state
ST33G640A
640
ST33G512A
512
ST33G384A
384
 Contact assignment compatible with
ISO/IEC 7816-2
 ESD protection greater than 4 kV (HBM)
March 2016
DocID027118 Rev 2
For further information contact your local STMicroelectronics sales office.
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Description
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ST33GxxxA
Description
The ST33GxxxA (see Table 1) is a serial access microcontroller designed for secure mobile
applications that incorporates the most recent generation of ARM® processors for
embedded secure systems. Its SecurCore® SC300™ 32-bit RISC core is built on the
Cortex® M3 core with additional security features to help to protect against advanced forms
of attacks.
The SC300™ core brings great performance and excellent code density thanks to the
Thumb®-2 instruction set.
The high-speed embedded Flash memory introduces more flexibility to the system.
The ST33GxxxA also offers a serial communication interface fully compatible with the
ISO/IEC 7816-3 standard (T=0, T=1) and a single-wire protocol (SWP) interface for
communication with a near field communication (NFC) router in SIM/NFC applications.
An SPI Master/Slave interface is also available for communication in non-SIM applications.
The ST33GxxxA features hardware accelerators for advanced cryptographic functions. The
EDES peripheral provides a secure DES (Data Encryption Standard) algorithm
implementation, while the NESCRYPT cryptoprocessor efficiently supports the public key
algorithm. The AES peripheral ensures secure and fast AES algorithm implementation.
The device 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.
The ST33GxxxA’s automotive grade is AEQ100 compliant and provides user Flash memory
capability up to 500 kcycles with 15 years’ data retention.
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
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ST33GxxxA
Description
Figure 1. Block diagram
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Software development tool description
2
ST33GxxxA
Software development tool description
Dedicated SecurCore® SC300™ software development tools are provided by ARM and
Keil®. This includes the Instruction Set Simulator (ISS) and C compiler. The documentation
is available on the ARM and Keil websites.
Moreover, STMicroelectronics provides:

A time-accurate hardware emulator controlled by the Keil debugger and the
STMicroelectronics development environment.

A complete product simulator based on Keil’s ISS simulator for the SecurCore®
SC300™ CPU.

A secured ROMed Flash memory loader with very high-speed software downloading
capabilities.
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ST33GxxxA
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Revision history
Revision history
Table 2. Document revision history
Date
Revision
Changes
19-Nov-2014
1
Initial release.
10-Mar-2016
2
Added Figure 1: Block diagram.
Small text changes.
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ST33GxxxA
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