1. Beam Secondary Shower Acquisition System: Igloo2 SERDES Manual Initialization Student Meeting Jose Luis Sirvent PhD. Student 31/03/2014

2. Igloo2 GBT-FPGA (STD) implementation status Substitute Xilinx IP’s by Microsemi IP’s (Others.. not) Transceiver with EPCS @ 4.8GBPS: - A lot of configuration registers - Big amount of documentation - Different implemented protocols (not needed) - Power-Up Initialization needed (HPMS) - Synchronization issues - Needed standalone testing and verification

3. Igloo2 SERDES Testing (EPCS-4.8Gbps) Looping the lines, TX & RX simulation and start-up sequence

4. Igloo2 SERDES Testing (TX & RX @ EPCS 4.8GBPS) Working with the Dev. Board and the means it provides Parallel Input Data (20 bits): “1111 0000 1111 1111 XXXX” Parallel Received Data (20 bits): “11110 00011 11111 1XXXX” FramePos  3 2 1 0

5. Igloo2 SERDES Testing (TX & RX @ EPCS 4.8GBPS) Working with the Dev. Board and the means it provides Parallel Input Data (20 bits): “1111 0000 1111 1111 XXXX” Parallel Received Data (20 bits): “11110 00011 11111 1XXXX” FramePos  3 2 1 0 FramePos3210 Recovered11111111XXXX11110000 Rx Tx SERDES DataTx_0 DataTx_1 … DataTx_19 DataRx_0 DataRx_1 … DataRx_19

6. GBT-FPGA Overview in Igloo2 (Clock Management) Tx_CLK (240MHz) Rx_CLK (240MHz) TX_Data_P (4.8Gbps) TX_Data_N (4.8Gbps) Rx_Word (19 bits) @ 240 MHz TX_Frame_CLK (40MHz) Data_In (83 bits) @40Mhz TX_Word_CLK (240MHz) RefCLK1_P (120MHz) RefCLK1_N (120MHz) RX_Data_P (4.8Gbps) RX_Data_N (4.8Gbps) GBT_TX Scrambler Encoder Gearbox Tx_Word (19 bits) @ 240MHz GBT_MGT SERDES_0 Vendor Specific IP TX_PLL GBT_RX Gearbox Decoder Descrambler Data_Out (83 bits) @ 40Mhz GBT_BANK (Very simplified view) RX_Frame_CLK (40MHz) RX_Word_CLK (240MHz) RX_PLL SERDES_INIT_MASTER APB_BUS (PLL)

7. GBT-FPGA Overview in Igloo2 (Clock Management) Tx_CLK (240MHz) Rx_CLK (240MHz) TX_Data_P (4.8Gbps) TX_Data_N (4.8Gbps) Rx_Word (19 bits) @ 240 MHz TX_Frame_CLK (40MHz) Data_In (83 bits) @40Mhz TX_Word_CLK (240MHz) RefCLK1_P (120MHz) RefCLK1_N (120MHz) RX_Data_P (4.8Gbps) RX_Data_N (4.8Gbps) GBT_TX Scrambler Encoder Gearbox Tx_Word (19 bits) @ 240MHz GBT_MGT SERDES_0 Vendor Specific IP TX_PLL GBT_RX Gearbox Decoder Descrambler Data_Out (83 bits) @ 40Mhz GBT_BANK (Very simplified view) RX_Frame_CLK (40MHz) RX_Word_CLK (240MHz) RX_PLL SERDES_INIT_MASTER APB_BUS (PLL) !! Dev. Kit FPGA

8. SERDES_INIT_MASTER: High Performance Memory Subsystem (HPMS): – The responsible for Peripherics Init  Quick, simple and transparent to user. – Problem  We need 2 Pll available per GBT_Bank and MG2010 has only 2!! – Possible Solution  Test with 2 Dev Board, one as TX and other as RX (Not possible to simulate our assembly, only some parts) – Resources: 1 x PLL, 1 x Fab_Osc, 1 x CoreConfigMaster (IP), 1 x CoreConfigP (IP), 1 x CoreResetP (IP),1 x CoreAHBLite (IP) Manual APB Master & ROM for SERDES Configuration: – Very few resources needed: 1x Fab_Osc, 1 x ROM – Better control over what’s happening on the SERDES block – No need of System Builder (visual interface) which sometimes crashes! – Need to understand Serdes Registers Initialization protocol and replicate it manually – In only one FPGA Dev. Kit we can test all the system Tx & RX with USB. Picture from M. Barros Marin

9. Manual APB Master & ROM For SERDES Configuration and Initialization: SERDES_INIT_REGISTERS.vhdl: Package that implements 2 ROM 1 x Data_Rom  Registers values 1 x Addess_Rom  Registers Addres Up to 73 registers to initialize Values assignments one by one based on Wizard Needed to understand some internal tricks and changes done by HPMS SERDES_APB_MASTER.vhdl: Implementation of APB bus protocol 32 bits Replicates the values and time structure done by HPMS in every line respecting APB protocol. Runs the complete initialization of all registers in ROM We only need here the Fab_OSC at 50Mhz

10. Manual APB Master & ROM For SERDES Configuration and Initialization: It works!! (Post-synthesis sim) Tx & RX @ 4.8Gbps Now we have the Two M2G010 PLL’s available for GBT-Bank !!

11. GBT-FPGA on Igloo2: The MGT block

12. Off-Topic comments: 1. Meeting with E.Picatoste & D.Gascon: – Designers ICECAL ASIC for LHCb. – Considered an interesting Plan-B for QIE10. – 4 ch ASIC seems to reach our specs in terms of timing (25ns and DC), for Dyn.Range we need to work with 2-3 in parallel (Dyn = 4e4  4fC – 15pC). We’ll need external ADC’s (Rec. AD41240 40Krad) – Working principle is the same as the one we use in the surface, also from LHCb VFC. – They will provide soon some samples for testing (pCVD splitting chain and noise) Current system on Surface

13. Off-Topic comments: 1. Meeting with E.Picatoste & D.Gascon: – Designers ICECAL ASIC for LHCb. – Considered an interesting Plan-B for QIE10. – 4 ch ASIC seems to reach our specs in terms of timing (25ns and DC), for Dyn.Range we need to work with 2-3 in parallel (Dyn = 4e4  4fC – 15pC). We’ll need external ADC’s (Rec. AD41240 40Krad) – Working principle is the same as the one we use in the surface, also from LHCb VFC. – They will provide soon some samples for testing (pCVD splitting chain and noise) Current system on Surface

14. Off-Topic comments: 2. Possibility for final prototype (good to keep in mind): – Workshop on FPGAs on high Energy physics: https://indico.cern.ch/event/300532/timetable/#20140321 https://indico.cern.ch/event/300532/timetable/#20140321 – Other developments could be interesting for us: CMS ngCCM board with Igloo2 Tom O ‘ Baron. FPGA For High Energy Physics Workshop—LHCb Inputs. Univ. of Maryland 21/03/2014