Godson 2
Godson 2
Developer	Institute of Computing Technology of the Chinese Academy of Sciences, Loongson
Manufacturer	STMicroelectronics, SMICS
Type	Microprocessors
Introduction	2003 (announced) October 17, 2003 (launch)
Architecture	64-bit MIPS processors
ISA	MIPS64
µarch	GS464
Word size	64 bit 8 octets 16 nibbles
Process	180 nm 0.18 μm 1.8e-4 mm , 130 nm 0.13 μm 1.3e-4 mm , 90 nm 0.09 μm 9.0e-5 mm , 65 nm 0.065 μm 6.5e-5 mm
Technology	CMOS
Clock	250 MHz-1,000 MHz
Succession
←	→
Godson 1	Godson 3

Godson 2 (龍芯２) is a family of 64-bit MIPS performance desktop processors developed by the Institute of Computing Technology of the Chinese Academy of Sciences (ICT) in 2003. The Godson 2 processors are now developed by Loongson Technology (which was co-founded by ICT) and sold as low-power embedded and desktop processors. The Godson 2 is famous for being the first Chinese developed 64-bit microprocessors as well as the first Chinese processors to break the gigahertz frequency.

Overview

Main article: GS464 µarch

The Godson 2 microprocessors are designed as a general purpose 64-bit that implements a MIPS64-like instruction set (Note that at the time ICT was not a MIPS licensee). Many improvements were done in Godson over its predecessor such as a wider pipeline capable of fetching and decoding four times as many instructions per cycle.

Initial Godson 2 models were fabricated on a 6-metal 0.18 µm process CMOS technology using automatic placing and routing. Later models enjoyed a series of process shrinks. The Godson 2 has integrated additional features over the years from just a CPU to an entire SoC incorporating a PCI/PCIX controller, memory controller, SPI/UART. Those processors utilized the a HyperTransport bus for the southbridge. Most recent models integrated much of the southbridge on-die as well including PCIe, SATA, and a USB controller as well as multimedia support (GPU, dual display, audio, and media decoders).

Godson 2 processors can be found in many low end laptops and embedded hardware manufactured by Lemote Technology.

Members

	List of Godson-2 Processors
	Processor						IGP
Model	Launched	Process	Frequency	L1$	L2$	Power	Name	Frequency
2A		180 nm 0.18 μm 1.8e-4 mm	250 MHz 0.25 GHz 250,000 kHz	64 KiB 65,536 B 0.0625 MiB		3 W 3,000 mW 0.00402 hp 0.003 kW
2B	17 October 2003	180 nm 0.18 μm 1.8e-4 mm	300 MHz 0.3 GHz 300,000 kHz	64 KiB 65,536 B 0.0625 MiB		3 W 3,000 mW 0.00402 hp 0.003 kW
2B1	March 2004	180 nm 0.18 μm 1.8e-4 mm	400 MHz 0.4 GHz 400,000 kHz	64 KiB 65,536 B 0.0625 MiB		4 W 4,000 mW 0.00536 hp 0.004 kW
2C	28 September 2004	180 nm 0.18 μm 1.8e-4 mm	500 MHz 0.5 GHz 500,000 kHz	128 KiB 131,072 B 0.125 MiB		5 W 5,000 mW 0.00671 hp 0.005 kW
2D	2006	130 nm 0.13 μm 1.3e-4 mm	700 MHz 0.7 GHz 700,000 kHz	128 KiB 131,072 B 0.125 MiB		5 W 5,000 mW 0.00671 hp 0.005 kW
2D1	2006	130 nm 0.13 μm 1.3e-4 mm	800 MHz 0.8 GHz 800,000 kHz	128 KiB 131,072 B 0.125 MiB		6 W 6,000 mW 0.00805 hp 0.006 kW
2E	18 March 2006	90 nm 0.09 μm 9.0e-5 mm	1,000 MHz 1 GHz 1,000,000 kHz	128 KiB 131,072 B 0.125 MiB	512 KiB 0.5 MiB 524,288 B 4.882812e-4 GiB	7 W 7,000 mW 0.00939 hp 0.007 kW
2F	June 2008	90 nm 0.09 μm 9.0e-5 mm	800 MHz 0.8 GHz 800,000 kHz	128 KiB 131,072 B 0.125 MiB	512 KiB 0.5 MiB 524,288 B 4.882812e-4 GiB	5 W 5,000 mW 0.00671 hp 0.005 kW
2G	November 2010	65 nm 0.065 μm 6.5e-5 mm	1,000 MHz 1 GHz 1,000,000 kHz	128 KiB 131,072 B 0.125 MiB	1,024 KiB 1 MiB 1,048,576 B 9.765625e-4 GiB	3 W 3,000 mW 0.00402 hp 0.003 kW
2H	March 2011	65 nm 0.065 μm 6.5e-5 mm	1,000 MHz 1 GHz 1,000,000 kHz	128 KiB 131,072 B 0.125 MiB	512 KiB 0.5 MiB 524,288 B 4.882812e-4 GiB	10 W 10,000 mW 0.0134 hp 0.01 kW	GC800	400 MHz 0.4 GHz 400,000 KHz
Count: 10