1. University of Illinois, at Urbana-Champaign
DES
DHE CRATE
SYSTEM MANAGEMENT
& CONTROL
Todd Moore
University of Illinois, at Urbana-Champaign
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

2. Todd Moore for the DES Collaboration PS Talk June 13th , 2007
Requirements
Protection:
DES Monsoon boards.
CCDs
Power Supplies
Monitoring:
DHE system voltages
DHE system temperature
Cooling fan speed
DHE crate system management power supply voltage
Control
Power supply power-up/down sequencing
Temperature of DHE, via fan speed control (Optional)
Optically isolated ‘DHE system shutoff’ signal
Optically isolated ‘DHE system OK’ signal
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

3. Todd Moore for the DES Collaboration PS Talk June 13th , 2007
Requirements
Communications (I2C/SMBus)
Optically isolated SDA (Serial Data Line) signal
Optically isolated SCL (Serial Clock Line) signal
Form factor
6Ux80mm transition board, to be installed in MCB transition board slot OR
Space left where Vicor supplies was mounted
Power comes from either dedicated supply or cooling fan power supply, with volt regulators on trans card
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

4. Todd Moore for the DES Collaboration PS Talk June 13th , 2007
Functional Diagram
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

5. Functional Description
Responds immediately to:
Overvoltage fault condition
Overtemp fault condition
Cooling fan speed fault condition
External ‘DHE system shutoff’ signal
Telescope slow controls can only:
Interrogate DHE system management to find out the current values
Execute a ‘DHE system shutoff’ signal to shut off all DHE supplies but remain on for interrogation from telescope slow controls
Reboot the DHE management system power supplies via turning off management system power supply
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

6. System Reboot Process Flow
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

7. Fault Condition Process Flow
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

8. Emergency & DHE System Shutoff Process Flow
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

9. uController/Hardware Monitor Choice
ADuC7019 – ADuC7028 Precision analog microcontroller
Analog I/O
Multichannel, 12-bit, 1 MSPS ADC, up to 16 ADC channels
Up to 4 12-bit voltage output DACs
On-chip temperature sensor
Voltage comparator
Microcontroller
ARM7TDMI core, 16 bit/32 bit RISC architecture
JTAG support
Clocking options
Trimmed on-chip oscillator (±3%)
External watch crystal
External clock source up to 44 MHz
41.78 MHz PLL with programmable divider
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

10. uController/Hardware Monitor Choice
Memory
62 kB flash/EE memory, 8 kB SRAM
On-chip peripherals
UART, 2 × I2C® and SPI® serial I/O
Up to 40-pin GPIO port
4× general-purpose timers
Wake-up and watchdog timers (WDT)
Power supply monitor
3-phase, 16-bit PWM generator (for fan speed regulation)
Programmable logic array (PLA)
External memory interface, up to 512 kB
We have an evaluation board
Todd Moore for the DES Collaboration PS Talk June 13th , 2007

11. Todd Moore for the DES Collaboration PS Talk June 13th , 2007
Additional Choices
External temperature monitor
NE1617A or ADT7461
Uses on-board temp sensor & remote temp sensor, which can be a 2N3904/2N3906 transistor
Uses SMBus for communication
National Semi LM75
Other uControllers/Hardware monitors
Actel Fusion mixed-signal FPGA
National Semi LM80
Todd Moore for the DES Collaboration PS Talk June 13th , 2007