Todd Moore for the DES CollaborationPS TalkJune 13 th, DES DHE CRATE SYSTEM MANAGEMENT & CONTROL Todd Moore University of Illinois, at Urbana-Champaign

Todd Moore for the DES CollaborationPS TalkJune 13 th, 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 CollaborationPS TalkJune 13 th, 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 CollaborationPS TalkJune 13 th, Functional Diagram

Todd Moore for the DES CollaborationPS TalkJune 13 th, 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 CollaborationPS TalkJune 13 th, System Reboot Process Flow

Todd Moore for the DES CollaborationPS TalkJune 13 th, Fault Condition Process Flow

Todd Moore for the DES CollaborationPS TalkJune 13 th, Emergency & DHE System Shutoff Process Flow

Todd Moore for the DES CollaborationPS TalkJune 13 th, 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 MHz PLL with programmable divider

Todd Moore for the DES CollaborationPS TalkJune 13 th, 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 CollaborationPS TalkJune 13 th, 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