Mongoose-V

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The Mongoose-V is a microprocessor protected against hard radiation that was developed for use in space vehicles. It provides an extended 10-15 MHz version of the MIPS R3000 - CPU is in from. Synova developed Mongoose-V was first in the satellite Earth Observing-1 used.

Technical specifications

Clock frequency: 10 MHz (other version with 5 MHz)

Number of transistors: 0.11 in millions with a structure size of 1.2 µm

Data bus: 32 bit

Address bus: 64 bit

Directly addressable memory of 16 MiB

10 ns command cycle

Decimal, binary and double precision arithmetic

256-pin QF package

construction

Terminal assignment and function

designation (Symbol)	Pin code	Input (E), output (A)	function
A0 - A32, A _H	223-256	A.	Address bus higher-order 32 bits of the memory or port address
D0 - D31	3 - 34	E.	Data bus
PEN_N	38	E.	Parity Enable Signal 1: To activate DP_0- DP_3 pins.
DP_0- DP_3	39-42	E.	Dataparity
BARN	50	A.	barn
RD_N	120	A.	Read (low active) 0 → CPU has released the data bus and is waiting for data from the memory or input port 0 ↑ 1 (rising edge) → CPU takes over the data from the data bus
RT_N	121	A.	Read Transaction (low active)
WR_0N- WR_3N	123-126	E.	Write Enable
WR	31	A.	Write, write (low active) 0 → CPU indicates that valid data is on the data bus
INTR INT_0- INT_5	44-48	E.	Interrupt request
INTMASK	49	E.	Interrupt mask
INTA	11	A.	Interrupt Acknowledge, interruption acceptance Is used instead of RD after accepting an INTR → activation of an interrupt module
RESET_N	36	E.	Reset input, reset input System reset
SYSCLK	103	E.	Clock input
V _CC +5 V	40		Supply voltage (+5 V)
V _SS GND	20th		Ground (0 V)

register

The Mongoose-V has 32 32-bit general purpose registers and 15 32-bit special registers. The Hi / Lo register pair is used to send operands and results to the multiplier or divider.

register
Reg	Function / meaning
r0	Hardwire Zero
r1	general register (32 bit)
r2	general register (32 bit)
...	general register (32 bit)
r31	general register (32 bit)
HI	Multiplier and divider (32 bit)
LO	Multiplier and divider (32 bit)
IC	Command counter (64 bit)
TAR	Return address memory (32 bit)
EPR	Hold value address memory (32 bit)
RIR	CPU ID memory (32 bit)
D / C-ICR	Cache test bit and breakpoint control bit (32 bit)

Previous use

Earth Observing-1 (EO-1)
NASA's Microwave Anisotropy Probe (MAP)

Space Technology 5 from NASA

CONTOUR

TIMED

New Horizons

Web links

Mongoose-V product page
Mongoose R3000 Processor / NASA Office of Logic Design
- A RADIATION-HARDENED, COMPUTER FOR SATELLITE APPLICATIONS / Sandia

Individual evidence

↑ Data sheet according to Mongoose-V MIPS R3000 Rad-Hard Processor. (PDF) Synova, 2008, archived from the original on July 24, 2015 ; accessed on August 14, 2014 .
↑ Satellite info Earth Observing-1. (PDF) NASA, 1996, accessed August 8, 2016 .
↑ 57.3.2 Synova Inc. Mongoose V . Extreme Environment Electronics, ISBN 978-1-4398-7431-8 , pp. 660-661.

[1] Data sheet according to Mongoose-V MIPS R3000 Rad-Hard Processor. (PDF) Synova, 2008, archived from the original on July 24, 2015 ; accessed on August 14, 2014 .

[2] Satellite info Earth Observing-1. (PDF) NASA, 1996, accessed August 8, 2016 .

[3] 57.3.2 Synova Inc. Mongoose V . Extreme Environment Electronics, ISBN 978-1-4398-7431-8 , pp. 660-661.