ANA

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ANA
ANA-ES.png
Xbox 360 Engineering Sample ANA
Type Internal/Beta/Retail
Purpose Video Encoder/Clock Generator
Rarity Common

The Xbox 360 ANA is a video encoder chip used to transfer the GPU framebuffer into different video signals supported by the Xbox 360 such as composite, S-Video, RGB-SCART, component and VGA. It also acts as a clock generator for different devices. The only functional difference between the ANA and HANA chip is the lack of HDMI support.

History

The Xbox 360 ANA chip was introduced in the XeDK era and was used in all board revisions (Internal and Beta) up to Xenon Retail. It was replaced with the HDMI supported HANA chip in Zephyr onwards.

There was a common misconception that the ANA chip was a hardware scaler that handled scaling the image to a 1080p format. User "Amir" from the Xbox 360 HDDVD department confirmed that the video scaling is all handled by the Xbox 360 Xenos GPU and that the ANA/HANA is only responsible for video encoding.[1]


Hardware

The Xbox 360 ANA is a QFP144 soldered chip that was custom designed by Microsoft for the Xbox 360.

Similar to the XSB, earlier Engineering Sample (-ES) ANA chips found in XeDKs used the older Xbox logo.

The HDMI equipped HANA is BGA225 soldered chip (25x25).

HANA

The HANA was first introduced with the Xbox 360 Zephyr motherboard design. The main differences between the older ANA chip being support for HDMI screens and the switch from a QFP footprint to a 225 pin BGA footprint.

Xbox 360 HANA (Slim)

The HANA also has an integrated Digital to Analog Converter (DAC) for the left and right audio channels and an integrated spread spectrum clock generator for most of the system's base clocks. On the previous ANA this was handled by an external 16-bit DAC chip and an external clock generator (although the older ANA still handled PIX and audio clocks directly).[2][3]

References

  1. "amirm". "Industry Insiders Master Q&A thread III: ONLY Questions to Insiders." avsforum, 06 June 2007, https://www.avsforum.com/forum/114-hdtv-software-media-discussion/851221-industry-insiders-master-q-thread-iii-only-questions-insiders-13.html#post10791437
  2. XENON_FABK Schematics, Microsoft, 24 August 2005
  3. FALCON_FABD Schematics, Microsoft, 08 May 2007

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