Chennai, Mar 16 (UNI) In a first of its kind in India in the area of high reliability

microprocessors and onboard computers for navigation, guidance and control

of launch vehicles, the Indian Space Research Organisation (ISRO) and the

Semiconductor Laboratory (SCL) Chandigarh handed over the the first production

lots of the 32-bit microprocessors for space applications, VIKRAM3201 and

KALPANA3201.

They were handed over to Dr. V. Narayanan, Secretary, Department of Space

and Chairman, ISRO by S. Krishnan, Secretary, MeitY, in a function organised

at New Delhi by the SCL on March 5, 2025.

In an update today, ISRO said these microprocessors were designed and

developed by the Vikram Sarabhai Space Centre (VSSC) in collaboration

with SCL.

VSSC Director Dr. Unnikrishnan Nair also participated in the function along with the

design teams.

Dr. Kamaljeet Singh, Director-General of SCL/MeitY and his team provided a brief

overview of the activities undertaken for the realization, packaging and qualification

of these processors for launch vehicle applications.

VIKRAM3201 is the first fully “Make-in-India” 32-bit microprocessor that is qualified

for use in the harsh environmental conditions of launch vehicles.

The processor was fabricated at the 180nm CMOS semiconductor fab of SCL.

This processor is an advanced version of the indigenously designed 16-bit

VIKRAM1601 microprocessor which has been flying in the Avionics system

of ISRO’s launch vehicles since 2009.

A “Make-in-India” version of the VIKRAM1601 processor was subsequently

inducted in 2016 after the 180nm semiconductor fab was established at SCL.

VIKRAM3201 and the VIKRAM1601 has a custom Instruction Set Architecture,

with floating-point computation capability and high-level language support for

the Ada language.

All the software tools such as the Ada compiler, assembler, linker, simulator

along with Integrated Development Environment (IDE) are developed in-house

by ISRO.

A C language compiler is also under development for providing more flexibility

to users in other domains.

"This is the first of its kind in India and has enabled Atmanirbharata in the area

of high reliability microprocessors and onboard computers for navigation, guidance

and control of launch vehicles", it said.

The initial lot of VIKRAM3201 devices was successfully validated in space in the

Mission Management Computer of the PSLV Orbital Experimental Module

(POEM-4) in the PSLV-C60 mission.

KALPANA3201 is a 32-bit SPARC V8 RISC microprocessor and is based on

the IEEE 1754 Instruction Set Architecture.

The microprocessor has been designed to be compatible with open-source

software toolsets along with in-house developed simulator & IDE and has been

tested with flight software.

Four other devices that were jointly developed with SCL were also handed over

towards significant miniaturisation of the launch vehicle Avionics system.

This includes two versions of a Reconfigurable Data Acquisition System (RDAS)

integrating multiple indigenously designed 24-bit Sigma-Delta Analog to Digital

Converters on a single chip along with a Relay driver Integrated Circuit and a

Multi-Channel Low Drop-out Regulator Integrated Circuit for high reliability

applications.

An MoU was also signed between SCL and VSSC for the development and

elivery of miniaturized unsteady pressure sensors for measuring dynamic

pressure in wind tunnels, ISRO said.

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