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IC Decap: Motorola XPC860PZP50D4 Communications Controller

XPC860PZP50D4 Package
XPC860PZP50D4 Package

This is a System On Chip from Motorola, designed for network routing applications. This chip contains a hell of a feature set, so I’ll just include an excerpt from the datasheet:

XPC860PZP50D4 Die
XPC860PZP50D4 Die

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General Electric A735 Digital Camera Teardown

Front
Front

This camera has now been retired after many years of heavy use. Exposure to a 3-year old has caused severe damage to the lens mechanism, which no longer functions correctly.

Rear Panel
Rear Panel

Pretty much standard interface for a digital camera, with a nice large LCD for it’s time.

Front Cover Removed
Front Cover Removed

With the front cover removed, the lens assembly & battery compartment is exposed.

Rear Cover Removed
Rear Cover Removed

Removing the rear cover exposes the LCD module & the main PCB, the interface tactile switches are on the right under a protective layer of Kapton tape.

Main Chipset
Main Chipset

Flipping the LCD out of it’s mounting bracket reveals the main camera chipset. The CPU is a NovaTek NT96432BG, no doubt a SoC of some kind, but I couldn’t find any information. Firmware & inbuilt storage is on a Hynix HY27US08561A 256MBit NAND Flash, with a Hynix HY5DU561622FTP-D43 256Mbit DRAM for system memory.
I couldn’t find any info on the other two chips on this side of the board, but one is probably a motor driver for the lens, while the other must be the front end for the CCD sensor input to the SoC.

Main PCB Reverse
Main PCB Reverse

The other side of the PCB handles the SD card slot & power management. All the required DC rails are provided for by a RT9917 7-Channel DC-DC converter from RichTek, an IC designed specifically for digital camera applications.
Top left above the SD card slot is the trigger circuitry for the Xenon flash tube & the RTC backup battery.

Main PCB Removed
Main PCB Removed

Once the main PCB is out of the frame, the back of the lens module with the CCD is accessible. Just to the left is the high-voltage photoflash capacitor, 110µF 330v. These can give quite the kick when charged! Luckily this camera has been off long enough for the charge to bleed off.

Sensor
Sensor

Finally, here’s the 7-Megapixel CCD sensor removed from the lens assembly, with it’s built in IR cut filter over the top. I couldn’t find any make or model numbers on this part, as the Aluminium mounting bracket behind is bonded to the back of the sensor with epoxy, blocking access to any part information.

Die images of the chipset to come once I get round to decapping them!

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Routemaster Control Unit

This is the control unit for a Routemaster system, that downloads traffic information for the area local to the vehicle.

Unit Overview
Unit Overview

Here is an overview of the unit, in it’s aluminium box.

 

 

 

 

 

Here is the unit with the top cover removed, showing the pair of PCBs. The bottom PCB is the main control PCB, the top one holds an IC similar to a SIM card & part of the radio.

Cover Removed
Cover Removed

 

 

 

 

 

 

 

 

 

 

 

Main PCB Top
Main PCB Top

Here is the main PCB removed from the casing, contains the program ROM & microcontroller. for the system

 

 

 

 

 

Daughtercard view. This holds another programmed CPLD, the custom SIM-like IC & the RTC battery, along with some power conversion circuitry.

Daughterboard Top
Daughterboard Top

 

 

 

 

 

 

 

 

 

 

 

Radio Receiver
Radio Receiver

This is the radio receiver, looks to be AM, the large loop antenna can be seen at the bottom of the box.