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HadCon a.k.a. HadControl a.k.a. HadShoPoMo


HadCon is a general purpose IO module for detector and experiment control as well as for small data acquisition systems.


(HADControl general purpose board) Since its first application has been a power monitor for the Hades Shower Detector it has been formerly introduced and well known as HadShoPoMo (Hades Shower Power Monitor (HADControl/HadShoPoMo general purpose board).

HadCon has an SoC on-board, ETRAX 100LX MCM 4+16 from AXIS (Wikipedia: en/de) - which will be discontinued, see the new HadCon2.

Running a standard Linux the Etrax provides "Connectivity to the world" via TCP/IP.
On the other side it connects via its internal serial interface to an ATMEL AT90CAN128 microcontroller and optionally to an Xilinx CPLD.
Via this junction the ATMEL provides a multitude of possible connections to field buses and general I/O ports.

EPICS base and its applications, modules, and extensions can be cross-compiled to run on Etrax Axis' CRIS architecture (see section Architecture: ETRAX's CRIS by AXIS

  • Summarizing:
    • CPU: AXIS ETRAX 100LX MCM 4+16
    • Microcontroller: ATMEL AT90CAN128
      • I2C (internal)
        • 2 × 4-channel 8-Bit DAC - Digital-to-Analog Converter
      • CANbus
        • galvanically isolated CAN - High-speed CAN Transceiver
          • optional external power supply
      • SPI
      • ADCs
      • RS232
      • 32 digital I/Os
    • CPLD: Xilinx XCR3064XL-6CS48C
    • 2 × Rotary Code Switches, hexadecimal coding
    • Ericsson PME 5218TS switching regulator for up to 6A 3.3V power usable for other boards
    • full EPICS support



  • GSI-EE's Documentation



  • ≈≥ 6V (, < 5 W), 5.5V to 8 V.
    • Ityp ≈ 200 mA
  • internal power regulator
    • Ericsson PME 5218TS switching regulator for up to 6A
      • 3.3V power usable for other boards



    USART - Universal Synchronous and Asynchronous serial Receiver and Transmitter

      connects to
    /dev/ttyS1 ATMEL
    /dev/ttyS0 RS232-connector


    USART - Universal Synchronous and Asynchronous serial Receiver and Transmitter

      connects to

CPLD (Complex Programmable Logic Devices)

    connects to:

    Device* ↔ *Device Bus/Signal
      pin     pins  
    D1 FB2
    D2 FB2
    D3 FB2
    A1 FB2 ADDR
    A2 FB2
    A3 FB2
    A4 FB2
    ATMEL PC0 (A8) FB3 PC
    PC1 (A9) FB3
    PC2 (A10) FB3
    PC3 (A11) FB3
    PC4 (A12) FB3
    PC5 (A13) FB3
    PC6 (A14) FB3
    PC7 (A15/CLK0) FB3
    JCPLD1 1 FB4 CP_GP0
    2 FB4 CP_GP1
    3 FB4 CP_GP2
    4 FB4 CP_GP3
    5 FB4 CP_GP4
    6 FB4 CP_GP5
    7 FB4 CP_GP6
    8 FB4 CP_GP7


    2 × 4-channel 8-Bit DAC - Digital-to-Analog Converter


VIN 5.5 - 8V → linear regulator: 5V → switching regulator: 3.3V

    linear regulator VIN: 5.5V - 8V → VOUT: 5V

    switching regulator: VOUT: 3.3V

galvanically isolated CAN-bus

    Can - High-speed Can Transceiver

    iCoupler Digital Isolator


    Rotary Code Switches, hexadecimal coding


    SW1 not mounted
    SW2 not mounted
    SWNB1 not mounted


      pin color
    ETRAX PA6 ???
    PA7 ???



    • I/O of ATMEL

      JDINOUT1 Connector Pins AT90CAN128 JDINOUT2 Connector Pins AT90CAN128
      1 PA0 (AD0) 1 PC0 (A8)
      2 PA1 (AD1) 2 PC1 (A9)
      3 PA2 (AD2) 3 PC2 (A10)
      4 PA3 (AD3) 4 PC3 (A11)
      5 PA4 (AD4) 5 PC4 (A12)
      6 PA5 (AD5) 6 PC5 (A13)
      7 PA6 (AD6) 7 PC6 (A14)
      8 PA7 (AD7) 8 PC7 (A15/CLK0)
      9/10 GND 9/10 GND


    • ADC inputs of ATMEL

      Connector Pins AT90CAN128 comments
      1 PF0 (ADC0)  
      2 PF1 (ADC1)
      3 PF2 (ADC2)
      4 PF3 (ADC3)

      5 PF4 (ADC4) overlap with JTAG inputs of ATMEL
      6 PF5 (ADC5)
      7 PF6 (ADC6)
      8 PF7 (ADC7)

      9/10 GND


    • JTAG connector

      Connector Pins Signal comments
      9/11 TCK 10kΩ to V3_3
      3 TDI ← CPLD / Jumper J2 ← ATMEL
      1 TMS  
      7 TDO → ATMEL (→ CPLD)
      4/6/8/10/12 GND  
      5 V3_3  
      2/13/14   not connected


    • JCAN1 CAN connector

      JCAN1 Connector Pins Signal comments
      1 CANH ↔ CAN - High-speed Can Transceiver ATA6660 ↔ iCoupler Digital Isolator ↔ ATMEL
      2 CANL
      3/5 VCAN_INPUT
      4/6 GND_CAN


    • Output of the 2 4-channel DAC (DAC5574)

      Connector Pins Signal Device Device pin
      1 DACOUT0 UDAC1 VoutA
      2 DACOUT1 VoutB
      3 DACOUT2 VoutC
      4 DACOUT3 VoutD
      5 DACOUT4 UDAC2 VoutA
      6 DACOUT5 VoutB
      7 DACOUT6 VoutC
      8 DACOUT7 VoutD
      9/10 GND    


    • mixed Signals DAC (DAC5574)

      Connector Pins Signal Device comments
      1/2 V5_0_CON  
      3/4 GND  
      5 DACOUT0 UDAC1 VoutA
      6 DACOUT1 VoutB
      7 DACOUT2 VoutC
      8 DACOUT3 VoutD
      9/10 POWER_ON AT90CAN128 PA7 (AD7)
      11 ADC0 PF0 (ADC0)
      12 ADC1 PF1 (ADC1)
      13 ADC2 PF2 (ADC2)
      14 ADC3 PF3 (ADC3)
      15 ADC4 PF4 (ADC4)
      16 ADC5 PF5 (ADC5)
      17 ADC6 PF6 (ADC6)
      18 ADC7 PF7 (ADC7)
      19/20 GND  


    • RS232 connector Sub-D 9
      Connector Pins ETRAX comments
      2 RXD0 ETRAX's /dev/tty0 via RS232 driver
      3 TXD0
      7 RTS0
      8 CTS0
      5 ==
      1/4/6/9 not connected

Bugs, Notes, Remarks, Tweaks & Twiddling

    Notes and Remarks


      1. When driving 1-wire devices, typically via JDINOUT2, make sure to have (at least) 1 pull-up resistor of about 3.3kΩ on the data line of the 1-wire bus connected to the power VDD.
        • Recommended to have it at the master, e.g. at HadCon's connector JDINOUT2.
        • Possible option for future, directly at the connector, when using one of JDINOUT2's pins as permanent power pin.

    Tweaks: increase ATMEL_CLOCK to 10MHz

    Bridge Flip-flop to increase ATMEL_CLOCK to 10MHz
    to be able to transmit up to baud rates of 115200 you have to manipulate the hardware of the hadcon.
    The clock signal of the oscillator X1 is 20 MHz. It is scaled down by two flip-flops (UFF1, UFF2) first to 10 MHz and then to 5 MHz.
    Now 10 MHz are needed
    Therefore UFF2 has to be bridged or short-cut, i.e.
    1. pin 5 of UFF2 has to be disconnected from its pad and removed
    2. A cable has to be soldered connecting pin 1 of UFF2 to the solder pad of pin 5

    Bug: Switches

    SW2 is not correct wired, don't use it



e.g. see:


-- PeterZumbruch - 16 Jul 2013

I Attachment Action Size Date Who Comment
max232cse.pdfpdf max232cse.pdf manage 395 K 2011-06-15 - 13:54 PeterZumbruch MAX232CSE - 5V-Powered, Multichannel RS-232 Drivers/Receivers
Topic revision: r10 - 2018-03-15, PeterZumbruch - This page was cached on 2024-06-23 - 09:44.

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