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project:weathersonde:hw [2013/06/26 18:34]
pinky [Vaisala weather sonde hardware]
project:weathersonde:hw [2016/06/17 22:43] (current)
pinky [CON6]
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 +====== 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 through sensors (3V pull-up, 2ms pulse to 0V select next sensor, 30-40 ms per measurement,​ 8 pull-down pulses before measurement restart. The sensor order is the same as order of measurement data in data frame) |
 +| 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
 
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