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Xbox-Hq.Com :: View topic - EEprom chip.
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AdmiralShlong
Xbox-HQ Member
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Xbox Version: 1.1 & 360E 500
Modded: X-DU Alpha ModChip

Joined: Oct 01, 2014
Posts: 85
Location: CA, USA

Post Posted: Mon Jul 17, 2017 7:08 pm   
Post subject: EEprom chip.
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Forgot to note this in a past post.

What spot on the board is the eeprom chip?

Any eeprom chip pin-out differences in board versions?

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BCFosheezy
Xbox-HQ Newbie
Xbox-HQ Newbie



Xbox Version: 1.1 & 360E 500
Modded: X-DU Alpha ModChip

Joined: Jul 23, 2017
Posts: 1

Post Posted: Thu Aug 17, 2017 10:19 am   
Post subject:
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The eeprom is the 8 pin IC right next to the TSOP. It's between the TSOP and the PIC. There should be no difference in pinout.

http://www.ogxbox.com


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AdmiralShlong
Xbox-HQ Member
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Xbox Version: 1.1 & 360E 500
Modded: X-DU Alpha ModChip

Joined: Oct 01, 2014
Posts: 85
Location: CA, USA

Post Posted: Mon Aug 28, 2017 7:32 pm   
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Thanks buddy. Me and my soldering station have awaited that answer.
_________________
320GB ST3320620A 7200RPM 16MB Cache
Gellid GC-Extreme Thermal Compound
StarTech 80 Conductor U-ATA Cable
80mm Xilence Hydro Bearing Fan
X-DU Chip & Toggle Switch
Taiyo Yuden Clock Cap
Xbox 1.1 MainBoard
XBMC 3.5.3 Dash
iND-BiOS 5004
128MB RAM


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kaos_engr
Xbox-HQ Enthusiast
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Joined: Jun 04, 2012
Posts: 31

Post Posted: Wed Sep 06, 2017 2:00 pm   
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V1.6 Xbox the EEPROM is next to the LPC debug port labeled U7D1. (V1.0-v1.5 Xboxes the EEPROM is labeled U7C2. See attached photos.)
  • U = First letter identifier for an integrated circuit (inseparable assembly)
      Other device type identifiers used on the Xbox printed circuit boards (PCBs):
      • R = resistor,
      • RP = resistor pack,
      • RT = thermistor,
      • C = capacitor,
      • L = inductor,
      • Q = transistor,
      • Y = oscillator,
      • D = diode,
      • CR = current rectifier (diodes),
      • J = connector,
      • SW = switch,
      • LED = light emitting diode,
      • FB = Ferrite Bead,
      • DB = ?? DBPAD - Test Point ??,
      • LB = label (e.g., serial number sticker)
  • 7D = location on PCB, look at the edges of the board for the number and letter sections.
    • 1A is located on the PCB's back right corner while looking at an Xbox sitting on a table with the front panel, controller ports and power/ejects buttons, facing you.
    • A-G rows - labeled along the left and right-hand edges of the PCB.
    • 1-8 columns - labeled along the top (furthest from you) and bottom (nearest to you) edges of the PCB.
  • 1 = unique number assigned to devices of the same type in this section of the PCB.


AtMel serial EEPROM datasheet attached below. The original Xbox uses a 2Kbit (256 x 8 bit) serial EEPROM to hold unique console configuration information.

For information on the Xbox's EEPROM content, visit xboxdevwiki.net's EEPROM page.



EEPROM U7C2 - Dev or Debug Kit - between TSOP and PIC (SMC).jpg
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EEPROM U7C2 - Dev or Debug Kit - between TSOP and PIC (SMC).jpg



EEPROM U7D1 - v1.6 Xbox.jpg
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EEPROM U7D1 - v1.6 Xbox.jpg



EEPROM U7C2 - v1.0 Xbox.jpg
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EEPROM U7C2 - v1.0 Xbox.jpg



EEPROM AtMel Datasheet - doc0180.pdf
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AdmiralShlong
Xbox-HQ Member
Xbox-HQ Member



Xbox Version: 1.1 & 360E 500
Modded: X-DU Alpha ModChip

Joined: Oct 01, 2014
Posts: 85
Location: CA, USA

Post Posted: Mon Sep 11, 2017 4:28 pm   
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U7D1 for 1.6, U7C2 for the rest. Good stuff! It realy sucks they categorized every IC component with a U, should have broken it down just a little more.
_________________
320GB ST3320620A 7200RPM 16MB Cache
Gellid GC-Extreme Thermal Compound
StarTech 80 Conductor U-ATA Cable
80mm Xilence Hydro Bearing Fan
X-DU Chip & Toggle Switch
Taiyo Yuden Clock Cap
Xbox 1.1 MainBoard
XBMC 3.5.3 Dash
iND-BiOS 5004
128MB RAM


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kaos_engr
Xbox-HQ Enthusiast
Xbox-HQ Enthusiast




Joined: Jun 04, 2012
Posts: 31

Post Posted: Fri Sep 29, 2017 6:11 am   
Post subject:
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AdmiralShlong wrote:
U7D1 for 1.6, U7C2 for the rest. Good stuff! It realy sucks they categorized every IC component with a U, should have broken it down just a little more.

The naming follows electronics standards. For the designer, there's no problem as they know the part number of each chip in the schematic and each part is given a short label for the PCB silkscreen to locate the chip.

As a hacker, without the schematic, makes things a bit harder to determine the chip functions without looking up each manufacturer's part number. Nice they, Microsoft, didn't sand off the part labels as a few modchip designers do or relabel chips with the wrong part numbers.


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