D5100Hardware

= Introduction = By just observing a D5100 motherboard, we were able to extract valuable information regarding connections between chips and their roles. Below is a log of all information retrieved, in no particular order. = Mainboard Layout =

Side A


= Known chips =

= Power lines = There several power sources, power lines and different power modes utilized by camera.

Voltage regulators and downstream power supplies

= Top Button/Dials/Hot-Shoe Connector = If we define the pinout as follows:



1~19 are related to buttons on top panel. 20~31 controls the flash and hot shoe. Pins were traced on the motherboard and here are the connections:

= AE CCD/Focusing Screen Connector = If we define the pinout as follows:



The left 13 pins (pins 13-25) are linked to focus screen (Super Impose Display Plate), 11 of which connect each to a focus dot.

The right 12 pins (pins 1-12) are responsible for the AE CCD.

Here are the traced pins:

= AF Sensor =

This connector is responsible for MultiCAM-1000 AF CCD.



= Lens CPU Pins/Front Body Switch =

This connector links the front body flexible circuit board with button and lens mount.



= Mirror/Aperture Module/Power PCB/Battery connector = If we define the pinout as follows:



Pin 1~18 controls the SQ Base Plate for all the electromechanical systems including the mirror, aperture and shutter. All other pins controls the components on Power Plate and battery authentication. Here are the traced pins:

=Toshiba TMP19=

Interfaces
So after more investigation, interfaces are connected as follows :

Buttons connections
Port PF7:4 are connected to the mode dial on the top of the camera. Here are the values for the different positions:

P57:6 are connected the multi-purpose dial on the back of the camera. Each time you turn the wheel to the right one "stop", those two input pins have their value rotated to the left by 4 positions : 11 > 10 > 00 > 01 > 11.

Other pins
=Expeed 2=

Interfaces
=S35393 RTC=

=Reference= EEPROM datasheet (ST95040): http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/CD00001755.pdf

LCD Driver datasheet (BU9795A): http://rohmfs.rohm.com/en/products/databook/datasheet/ic/driver/lcd_segment/bu9795afv-e.pdf

K4T1G164QF-BCE7: http://www.samsung.com/global/business/semiconductor/file/2011/product/2011/7/18/565798ds_k4t1gxx4qf_rev12.pdf

MX29GL128EHXFI-90G: http://www.zlgmcu.com/mxic/pdf/NOR_Flash_b/MX29GL128EHL_MX29GL128EUD_DS_EN.pdf

WM8946E: http://www.wolfsonmicro.com/documents/uploads/data_sheets/en/WM8946.pdf

BD6736 http://photo-parts.com.ua/parts/Datasheets/BD6736bd6736fv-e.pdf

MS518SE http://www.sii.co.jp/components/battery/productSpecBatEN.jsp?recordID=73

S35393 http://datasheet.sii-ic.com/en/real_time_clock/S35392A_E.pdf

Image Sensor: IMX071