Description

The GR716A features a fault-tolerant LEON3 SPARC V8 processor, communication interfaces and on-chip ADC, DAC, Power-on-Reset, Oscillator, Brown-out detection, LVDS transceivers, regulators to support for single 3.3V supply, ideally suited for space and other high-rel applications. The GR716A is supported by a software development environment described below.

Specifications

• System frequency up-to 50 MHz
• SpaceWire links up-to 100 Mbps
• CQFP132 hermetically sealed ceramic package
• Total Ionizing Dose (TID) up to 100 krad (Si, functional)
• Single-Event Latch-Up (SEL) to LETTH > 118 MeV-cm2mg
• Single-Event Upset (SEU) below 7E-6 event/device/day in typical space orbits
  
• Support for single 3.3V supply

Features

• Fault-tolerant SPARC V8 processor with 31 register windows 
• 16-bit instruction set: LEON-REX for improved code density
• Double precision IEEE-754 floating point unit
• Memory protection units with 8 zones and individual access control of peripherals
• Deterministic software execution and non-intrusive debugging
• Fast context switching (PWRPSR, AWP, register partitioning, interrupt mapping, SVT, MVT) 
• Interrupt zero jitter delay
• Non-intrusive advanced on-chip debug support unit with trace buffers and statistics
• External EDAC memory: 8-bit PROM/SRAM, SPI, I2C
• SpaceWire interface with time distribution support, 100 Mbps
• MIL-STD-1553B interface
• 2x CAN 2.0B controller interface
• PacketWire with CRC acceleration support
• Programmable PWM interface
• SPI with SPI-for-Space protocols
  
• UARTs, I2C, GPIO, Timers with Watchdog
• Interrupt controller, Status registers, etc.
• Dual ADC 11bits @ 200Ksps, 4 differential or 8 single ended
• DAC 12bits @ 3Msps, 4 channels
• Mixed General purpose inputs and outputs
• Power-on-Reset and Brown-out-detection
• Temperature sensor, Integrated PLL
• On-chip regulator for 3.3V single supply

Integrated Analog functions

• Dual 11 bits 200KS/s SAR ADC with Pre-amplifier
• 12 bit 3.75MS/s Rad Hardened DAC
• Rad Hardened PLL
• Crystal Oscillator
• Power On System Reset
• 1.8V and 3.3V voltage monitors
• GPIO with local Power on Control
• LVDS transceivers with build-in reference
• Rad Hardened voltage and current reference
• Rad Hardened Low-drop regulators for single supply support
• Rad Hardened external voltage references
• Rad Hardened high density RAM with EDAC protection

Memory support

• 192KiB EDAC protected tightly coupled memory with single cycle access from processor and ATOMIC bit operations
• Embedded ROM with bootloader for initializing and remote access
• Dedicated SPI Memory interface with boot ROM capability
• I2C memory interface with boot ROM capability
• 8-bit SRAM/ROM I/F with support up to 16MiB ROM and 256MiB SRAM
• Scrubber with programmable scrub rate for all embedded memories and external PROM/SRAM and SPI memories
• Redundant boot memory (PROM/SRAM/SPI/I2C/NVRAM)
• Application software container for checking software integrity using CRC
• Boot from internal SRAM, external PROM/FLASH/SRAM/SPI/I2C memory

Applications

Support for many different standard interfaces makes the GR716A microcontroller ideally fit for handling supervision and control tasks in a satellite, such as

• propulsion system control
• sensor bus control
• robotics applications control
• simple motor control
• mechanism control
• power control
• particle detector instrumentation
• radiation environment monitoring
• thermal control
• antenna pointing control
• remote terminal unit control
• simple instrument control

Software Development Environment (SDE)

We provide compiler toolchains and development tools with GR716A specific support such as the GR716A BSPs, GRMON support and simulator CPU/IO models. The Bare-metal environment is free and open-source. The GR716-MINI board can be evaluated using the free GRMON3 evaluation version.

Our SDE for the GR716 consists of the following software components from:

• BCC2 Bare-metal C/C++ GCC/LLVM toolchain environment
• Zephyr RTOS with GR716 BSP
• GRMON3 hardware debugger
• TSIM3 GR716 instruction simulator

Availability

Flight parts of the GR716A are available. The qualifications status for such parts is:

• Qualification tests as per PCA defined by ESCC Basic Specification No. 2567000
• Screening tests as per ESCC 9000

Detailed ordering information is described in the GR716-DS-UM.

Resources