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--- en:ovi40build:uiboardbuild [25.01.2018 15:50] – df9ts
+++ en:ovi40build:uiboardbuild [02.03.2018 18:13] (current) – df9ts_user
@@ Line 1: / Line 1: @@
-{{tag>review}}
-===== Building the UI V1.8 Board =====
-==== OVI40 UI V1.7 Documents ====
-**UI V1.7 documents are provided for information only**. Please primarily use the V1.8 documents for building the UI V1.8 board.
-   * {{:projekte:ovi40-sdr:uhsdr_ovi40_ui_v17_sheet.pdf|OVI40 UI V1.7 schematics}}
-   * {{:projekte:ovi40-sdr:uhsdr_ui_ovi40_bst_bot_layer_17.pdf|UI V1.7 component placement - bottom layer}}
-   * {{:projekte:ovi40-sdr:uhsdr_ui_ovi40_bst_top_layer_17.pdf|UI V1.7 component placement - top layer}}
-Please note that the component placement docs are searchable pdf documents. During soldering they can be used to quickly find a component's location by entering the component reference (e.g. "R20") in pdf search. No need to be concerned to use the V1.7 component placement doc for assembling a V1.8 UI board - V1.7 and V1.7 are quite similar in this respect.
-==== OVI40 UI V1.8 Documents ====
-  * {{:projekte:ovi40-sdr:uhsdr_ovi40_ui_18_sheet.pdf|OVI40 UI V1.8 schematics}}
-   * [[:projekte:ovi40-sdr:bom|OVI40 UI V1.8 BOM]]
-  * {{:projekte:ovi40-sdr:parts-installation_2_ui_v1.8.pdf|BOM created by Francois F4HTX with additional info}}
-==== OVI40 UI V1.8 Kit Contents ====
-The kit contains UI V1.8 PCB, components in bags and packing list. The display is delivered as assembled and tested unit.
-|< 60% 33% 33% 33% >|
-|[{{:projekte:ovi40-sdr:i40_20.jpg?150|Components in bags (Foto: DL8EBD)}}]|[{{:projekte:ovi40-sdr:i40_22.jpg?150|UI V1.8 PCB (Foto: DL8EBD)}}]|[{{:projekte:ovi40-sdr:i40_21.jpg?150|Display board (Foto: DL8EBD)}}]|
-==== Assembly and Soldering ====
-The graphics below - UI V1.7 with 3.2" Display - give an impression on how the finished V1.8 UI board will look like:
-|< 95% 50% 50% >|
-|  [{{:ovi40build:ui_top_3d.png?400|UI Board V1.7 mit 3.2" Display)}}]  |  [{{:ovi40build:ui_bottom_3d.png?400|UI Board V1.7}}]  |
-=== Please read Errata carefully ===
-Make sure to read the [[:ovi40build:batch1uiboarderrata|Errata]] carefully **before starting assembly.**
-<code>
-  === IC Device Markings ===
-</code>
-The smaller ICs can be identified by device mark. The following device marks are used:
-|< 45% 25% 25% 25% 25% >|
-|Typ  |Device Mark  |Schematic  |Purpose  |
-|LP5907_Q1  |LLVB  |IC3  |LDO 3.3 V  |
-|BAV70  |A4  |D5, D6  |Diode  |
-|BC857B  |3F  |T3  |Transistor|
-|BAS85  |Ring = Cathode|D7 - D9  |Diode  |
-=== MCU STM32 "Pin 1" marking ===
-Please understand the correct orientation of STM32 MCU Pin 1. There are two markings on the IC. Please not the text printed on MCU to find the correct Pin 1: When reading the text Pin 1 is on bottom left corner.
-[{{:projekte:ovi40-sdr:ui-i40-cpu.jpg?400| Orientation of TXCO & MCU (photo DF9EH)}}]
-<code>
-  === STM32F76X_ZIT vs. STM32H743ZIT6 ===
-</code>
-The kit is shipped with STM32F76X_ZIT ("F7"). The just released STM32H743ZIT6 ("H7") may be used instead. It is suggested to use the F7 for now. Rwason: it is planned to support the H7 in the UHSDR, but no boot loader oder firmware is released for the H7 at the moment.
-Comparison of MCUs:
-|< 90% 25% 25% 25% 25% >|
-|   |mcHF:  |OVI40:  |OVI40 - future:  |
-|   |STM32F407VET6|STM32F767ZIT6|STM32H743ZIT6  |
-|Flash[kB]  |500  |2048  |2048  |
-|RAM [kB]  |192  |512  |1024  |
-|Clock[MHz]  |168  |216  |400  |
-|FPU  |single  |double  |double  |
-|Pins  |100  |144  |144  |
-|DMIPS  |210  |462  |856  |
-=== EEPROM IC7 orientation ===
-[{{:ovi40test:ic7_einbau.jpg?400|EEPROM IC7 position (photo DF9EH)}}]
-This is where the dot is printed. Also the edge of the case is slanted near the 1-4 pins. See [[http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8828-SEEPROM-AT24CM02-Datasheet.pdf|here]]
-=== Prevent short cut with back up battery holder ===
-One of the connection pins of the battery holder might touch ground connection of a rotary encoder. Make sure to cut this pin flush with PCB surface **before soldering**  - see photo:
-[{{:projekte:ovi40-sdr:batt_halter.jpg?400|Potential Shortcut (photo DF9EH)}}]
-=== Polarised capacitors ===
-Please observe mounting orientation of tantal and electrolytic capacitors. Markings on the capacitors are explained [[http://elektroniktutor.de/bauteilkunde/c_smdcod.html|http://elektroniktutor.de/bauteilkunde/c_smdcod.html|here]]
-=== Mounting locations of switches S7 and S8 ===
-Two different mounting locations are provided on the UI PCB for S7 and S8:
-  * "mcHF style": S7 and S8 not line with switches under LCD - they are mounted slightly higher
-  * "OVI40 style": S7 and S8 are mounted in line with the function keys under the LCD
-"In line" is the preferred mounting location for S7 and S8.
 ==== Modifications ====
 === Temporary Modification: Resistor in parallel to C94 ===
-Symptom: In stand-by the current drawn from back-up battery is excessively high. Work-around: Put resistor in parallel to C94. Start with a value of 56k - this seems to work in most cases. If board does not start increase value slightly.
+Symptom: In stand-by the current drawn from back-up battery is excessively high. Work-around: Put resistor in parallel to C94. Start with a value of 56k - this seems to work in most cases. If board does not start increase value slightly. The same approach is used BTW in the commercially available Disco F746 prototype board.
 === Change brightness of LEDs ===
@@ Line 115: / Line 12: @@
   * R37 auf 6,8k (D2 rot)
   * R116 auf 6,8k (D3 blau)
-\\