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Array Photometer

Array Photometer. Tohoku University. T1 x N. DATA_ENB. T1. DATA_CLOCK. B11. B10. B0. DATA_A. MSBB11. LSBB11. B11. B10. B0. DATA_B. MSBB11. LSBB11. 1. ALL SIGNALS RS-422. 2. ALL SIGNALS DRIVEN LOW EXCEPT DRIVING TRANSFER. 3. ALL SIGNALS FROM AP to AEP.

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Array Photometer

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  1. Array Photometer Tohoku University

  2. T1 x N DATA_ENB T1 DATA_CLOCK B11 B10 B0 DATA_A MSBB11 LSBB11 B11 B10 B0 DATA_B MSBB11 LSBB11 1. ALL SIGNALS RS-422 2. ALL SIGNALS DRIVEN LOW EXCEPT DRIVING TRANSFER 3. ALL SIGNALS FROM AP to AEP 4. AP CHANGES DATA ON FALLING EDGE of DATA_CLOCK 5. AEP READS DATA ON RISING EDGE of DATA_CLOCK 6. VARIABLE DATA_CLOCK RATE WITH SAMPLING RATE T1 = 195ns(min) SAMPLING RATE = 20KHz T1 = 1950ns SAMPLING RATE = 2KHz T1 = 19.5us SAMPLING RATE = 200Hz

  3. ARRAY PHOTOMETER AEP/AP COMMAND INTERFACE MODE Command Name OPERATION COMMAND CODE Change Sampling Mode S_MODE_SPRITE20 SPRITE MODE 20KHz SAMPLING 60 hex S_MODE_SPRITE2 SPRITE MODE 2KHz SAMPLING 61 hex S_MODE_AURORA AURORA MODE 200Hz SAMPLING 62 hex High Voltage Control HV_LOW_A CHANNEL A HV = TBD (LOW VOLTAGE) 68 hex HV_LOW_B CHANNEL B HV = TBD (LOW VOLTAGE) 69 hex HV_MID_A CHANNEL A HV = TBD (MID VOLTAGE) 6A hex HV_MID_B CHANNEL B HV = TBD (MID VOLTAGE) 6B hex HV_HIGH_A CHANNEL A HV = TBD (HIGH VOLTAGE) 6C hex HV_HIGH_B CHANNEL B HV = TBD (HIGH VOLTAGE) 6D hex HV_OFF_A CHANNEL A HV = 0V (OFF) 6E hex HV_OFF_B CHANNEL B HV = 0V (OFF) 6F hex Calibration CAL_ON CALIBRATION ON 78 hex CAL_OFF CALIBRATION OFF 79 hex ANALOG HOUSEKEEPER LINE MULTIPLEX ANA_HKP_MUX DO15:+5V VOLTAGE MONITOR 7A hex DO14:+12V VOLTAGE MONITOR DO13:-12V VOLTAGE MONITOR DO12:PM1 TEMP MONITOR(PM1 room) DO11:PM2 TEMP MONITOR(PM2 room) DO10:CONT TEMP MONITOR(Control room) DO9 :CHANNEL A HV MONITOR DO8 :CHANNEL B HV MONITOR

  4. DATA C(7:0) = E6 hex C(7:0) = E7 hex DI15 SPRITE MODE 20KHz SAMPLING DI14 SPRITE MODE 2KHz SAMPLING DI13 AURORA MODE 200Hz SAMPLING DI12 CH A HV = LOW DI11 CH B HV = LOW DI10 CH A HV = MID DI9 CH B HV = MID DI8 CH A HV = HIGH DI7 CH B HV = HIGH DI6 CH A HV = OFF DI5 CH B HV = OFF DI4 CALIBRATION ON DI3 CALIBRATION OFF DI2 TOGGLE BIT(alternate this bit with readback) DI1 DI0 ARRAY PHOTOMETER AEP/AP READBACK INTERFACE

  5. ANALOG HKP 1. +5V VOLTAGE MONITOR 2. +12V VOLTAGE MONITOR 3. -12V VOLTAGE MONITOR 4. PM1 TEMP MONITOR 5. PM2 TEMP MONITOR 6. CONT TEMP MONITOR 7. CHANNEL A HV MONITOR 8. CHANNEL B HV MONITOR

  6. ARRAY PHOTOMETER AEP / AP INTERFACE Command/Data Interface NOTES: 1.Nominal CDI_CLK frequency is 2MHz. 2.MSbit first. LSbit last. 3.Sender changes CDI_DAT data on falling edge of CDI_CLK. 4.Receiver latches CDI_DAT on next rising edge of CDI_CLK. 5.An independent set of three (four) lines (CDI_CLK.CDI_DAT. (or CDI_DATC and CDI_DATR). CDI_STB) runs from DPU to eachsubsystem. 6. RS-422 signal levels are used between DPU and subsystemsexternal to the AEP. 7.DPU drives all RS-422 + signals low (- signals high) except during use. 8.DPU floats RS-422 signals when subsystem is powered off. 9. During data portion of readback cycle, DPU floats TTL CDI_DAT and subsystem drives TTL CDI_DAT. 10. Receiver can use CDI_STB to initialize receive logic for next command. 11. After reset DPU will send dummy CDI command to initialize receivers.

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