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Godson-2H - Loongson
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Template:mpu Godson-2H (龙芯2H) is a 64-bit MIPS performance processor developed by ICT and later Loongson for desktop computers. Introduced in late-2010, the Godson-2H operates at up to 1 GHz consuming up to 10 W. This chip was manufactured on STMicroelectronics' 65 nm process.

The Godson-2H is actually a complete system on a chip incorporating the northbridge along with the southbridge on-die. Additionally the Godson-2H also incorporates a low-power Vivante GC800 IGP operating at 400 MHz.

In addition to a standalone SoC, the Godson-2H can also operate in slave-mode serving as a cooperative southbridge to the more powerful Godson 3 multi-core processor family.

Cache

Main article: GS464V § Cache

[Edit/Modify Cache Info]

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Cache Organization
Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory.

The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC.

Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies.

Note: All units are in kibibytes and mebibytes.
L1$128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
L1I$64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
1x64 KiB4-way set associative 
L1D$64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
1x64 KiB4-way set associative 

L2$512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
  1x512 KiB4-way set associative 

Memory controller

[Edit/Modify Memory Info]

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Integrated Memory Controller
Max TypeDDR3-800
Supports ECCYes
Max Mem4 GiB
Controllers1
Channels1
Max Bandwidth11.92 GiB/s
Bandwidth
Single 11.92 GiB/s

Graphics

[Edit/Modify IGP Info]

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Integrated Graphics Information
GPUGC800
DesignerVivante
Execution Units4
Frequency400 MHz
0.4 GHz
400,000 KHz
OutputVGA, SDVO, CRT

Max Resolution
DSI1920x1080
VGA1920x1080

Standards
DirectX11
OpenGL3.0
OpenCL1.1
OpenGL ES2.0

Expansions

This chip has integrated HyperTransport 1.03 operating at 200, 400, or 800 MHz.

[Edit/Modify Expansions Info]

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Expansion Options
PCIe
Revision2.0
Max Lanes4
Configs1x4, 4x1
USB
Revision2.0
Ports6
SATA
Revision2
Ports2
LPC
Revision1.1
I²C
Ports2

GP I/O16 lines
JTAGYes

Networking

[Edit/Modify Network Info]

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Networking
MII
RGMIIYes

Die Shot

godson-2h die shot.png

References

  • Xiao, Bin, et al. "Godson-2H: a complex low power SOC in 65nm CMOS." Circuits and Systems (MWSCAS), 2012 IEEE 55th International Midwest Symposium on. IEEE, 2012.
  • Loongson Technology, "龙芯芯片产品技术白皮书" ("Godson chip product technology white paper")
Facts about "Godson-2H - Loongson"
has ecc memory supporttrue +
integrated gpuGC800 +
integrated gpu base frequency400 MHz (0.4 GHz, 400,000 KHz) +
integrated gpu designerVivante +
l1$ size0.125 MiB (128 KiB, 131,072 B, 1.220703e-4 GiB) +
l1d$ description4-way set associative +
l1d$ size0.0625 MiB (64 KiB, 65,536 B, 6.103516e-5 GiB) +
l1i$ description4-way set associative +
l1i$ size0.0625 MiB (64 KiB, 65,536 B, 6.103516e-5 GiB) +
l2$ description4-way set associative +
l2$ size0.5 MiB (512 KiB, 524,288 B, 4.882812e-4 GiB) +
max memory channels1 +
max pcie lanes4 +
supported memory typeDDR3-800 +