Differences

This shows you the differences between two versions of the page.

--- project:weathersonde:hw [2013/06/26 16:33] – [Vaisala weather sonde hardware] pinky
+++ project:weathersonde:hw [2016/06/05 10:22] – [Parts - Integrated curcuits description] pinky
@@ Line 1: / Line 1: @@
+====== Vaisala weather sonde hardware ======
+===== Sensors stick =====
+TODO image
+^ name ^ description ^
+| tempC | temperature sensor (capacitive ?) |
+| HUM1 | humidity sensor 1 |
+| HUM2 | humidity sensor 2 |
+| temp2 | thermistor |
+===== Connectors ======
+^ name ^ description ^
+| CON1 | service connector - used for programming and during calibration |
+| CON2 | external sensors connector |
+| CON3 |  |
+| CON4 | service connector + other |
+| CON5 | join main board and TX boarx |
+| CON6 | join main board with sensors board |
+| CON7 |  |
+| CON8 |  |
+  * GPS antenna: 3dBic (dB - isotropic circular), RHCP, omnidirectional
+===== pinouts =====
+Pinouts as used in this project.
+{{:project:weathersonde:side_a.png?direct&300|}} {{:project:weathersonde:side_b.png?direct&300|}}
+==== CON1 ====
+^ pin ^ description ^
+| 1 | GND |
+| 2 | +9Vcc - 9 V |
+| 3 | ?   (to u-controller pin 27, pull-up) |
+| 4 | ?   (to u-controller pin 26, floating) |
+| 5 | ?   (to u-controller pin 45, pulled-down) |
+| 6 | NC |
+| 7 | ?   (to u-controller pin 46, pull-up) |
+| 8 | SPI_SS_EEPROM - SPI select EEPROM|
+| 9 | SPI_MOSI |
+| 10 | SPI_CLK |
+| 11 | SPI_MISO |
+| 12 | RESET - ground to switch into service mode |
+==== CON4 ====
+^ pin ^ description ^
+| 1 |  |
+| 2 |  |
+| 3 | GND |
+| 4 | GND |
+| 5 | ? (to u-controller pin 27, pull-up) |
+| 6 | ? (to u-controller pin 26, floating) |
+| 7 | ? (to u-controller pin 45, pulled-down) |
+| 8 |  |
+| 9 | ? (to u-controller pin 46, pull-up) |
+| 10 | SPI_SS_EEPROM - SPI select EEPROM |
+| 11 | SPI_MOSI |
+| 12 | SPI_CLK |
+| 13 | SPI_MISO |
+| 14 | RESET - ground to switch into service mode |
+| 15 |  |
+| 16 | +2V8cc - 2.8 V, generated by regulator (IC ?? TODO) from +9Vcc |
+==== CON5 ====
+TODO: the following must be re-checked
+^ pin ^ description ^
+| 1 | Logic VCC (3.45V) |
+| 2 | Serial Clock (2400Hz) |
+| 3 | Serial Data (2400 Baud) |
+| 4 | TX Enable? Stays low when clock starts, but goes high later (when serial data is present) |
+| 5 | SPI Data Input |
+| 6 | GND |
+| 7 | 16MHz clock from GPS Module |
+| 8 | GND |
+| 9 | SPI Clock |
+| 10 | TX Programming?? - Could be Chip Select |
+| 11 | Internal LDO Inhibit. Is wired to the module's LDO regulators Inhibit pin via 10k resistor. |
+| 12 | TX Inhibit - Connected to Base of Switching transistor inside module. |
+| 13 | Main Power - Measured Battery Voltage on this pin (12V in my case) |
+| 14 | GND |
+==== CON6 ====
+^ pin ^ name ^ description ^
+| 1 | VCC | power (9V) |
+| 2 | HEAT_TOP | enable heating for upper humidity sensor (0 V - disabled, 3V - enabled) |
+| 3 | MEAS | measurement signal with varying frequency, (2.75V, square, f ~= 10kHz) |
+| 4 | GND |
+| 5 | THERM | connect directly to thermistor on sensors stick (silver blob) |
+| 6 | START | restart measurement cycle (3V pull-up, 1 ms pulse to 0V, repeats with 1sec period) |
+| 7 | SENS_SELECT | cycle trought sensors (3V pull-up, 2ms pulse to 0V to select next sensor, 30-40 ms per measurement, 8 pull-down pullses before measurement restart) |
+| 8 | HEAT_BOTTOM | enable heating for lower humidity sensor (0 V - disabled, 3V - enabled) |
+TODO: other connectors
+===== Parts - Integrated curcuits description =====
+=== IC1 - SPI EEPROM ===
+  * type: M95256
+  * description: 256 kbit SPI EEPROM
+=== IC2 ===
+  * type: DSP1C \\ VAISALA \\ 1037C \\ 03004
+  * package: 64-TQFP (4x16 leads square)
+  * description: controller, details unknown (CPU, ASIC? DSP?)
+DSP1C is made and developed by VLSI specificaly for VAISALA. Is based on VS-DSP (ver 1. ?) DSP core. No more information can be provided by VLSI.
+=== IC3 ===
+  * type: uN8021C
+  * description: GPS FR fronend
+=== IC4 - RF PCB ===
+  * type: TX1B \\ VAISALA \\ 1129G \\ 37133
+=== IC5 - RF PCB ===
+  * type: L4931C50 \\ (ST) GK23b
+Very low drop voltage regulator (5.0 V) with inhibits.
+=== IC6 - sensors PCB ===
+  * pins: 24
+  * type: VAISALA1608B1 \\ G1223 \\ 40981
+=== IC7 - sensors PCB ===
+  * pins: 8
+  * type: C25 \\ 03 \\ nD2 \\ 28
+=== IC8, IC9 - sensors PCB ===
+  * pins: 6
+  * type: r13
+  * description: NPN and PNP transistor in single package
+=== P1 ===
+  * capacitive barometric sensor
+  * BAROCAP Capacitive aneroid
+  * range: 3-1060 mb