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Rohm PMIC BD96801 User Manual

Powering xilinx spartan-7 fpga
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User's Guide
PMIC BD96801 powering Xilinx Spartan-7
FPGA
User's Guide
© 2022 ROHM Co., Ltd.
65UG018E Rev.001
1/36
July 2022

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Summary of Contents for Rohm PMIC BD96801

  • Page 1 User’s Guide PMIC BD96801 powering Xilinx Spartan-7 FPGA User’s Guide © 2022 ROHM Co., Ltd. 65UG018E Rev.001 1/36 July 2022...
  • Page 2 [8] Be sure to wear insulated gloves when handling is required during operation. After Use [9] The ROHM Evaluation Board contains the circuits which store the high voltage. Since it stores the charges even after the connected power circuits are cut, please discharge the electricity after using it, and please deal with it after confirming such electric discharge.
  • Page 3 The evaluation board provided here has only been subjected to functional testing under typical load conditions. The design of this evaluation board is tested by ROHM only as described in the user guide for this board. The design is not qualified in terms of safety requirements, manufacturing and operation over the entire operating temperature range or lifetime.

  • Page 4: Table Of Contents

    JTAG interface ................................13 3.10. I2C interface ..................................14 Testing default FPGA software ..............................14 Power sequencing..................................16 Troubleshooting ..................................16 Schematic and BOM ................................18 PCB layout ....................................27 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 4/36 July 2022...

  • Page 5: Safety Precautions

    Failure to do so may cause personal injury. Caution: Incorrect connection of power supplies or loads can damage the board. Carefully review the information in this document. © 2022 ROHM Co., Ltd. 65UG018E Rev.001 5/36...

  • Page 6: Introduction

    Current FPGA-based designs require highly integrated power supply solutions containing multiple well-defined and accurate output voltages. Starting up and shutting down an FPGA demands a well-defined power sequencing. The scalable PMIC BD96801 is a configurable power management IC that can quickly be adapted to work with various FPGAs. The voltages of the PMIC outputs are programmable via OTP setting or I2C.

  • Page 7: Board Details

    The system is powered by a primary buck controller BD9F500, a secondary PMIC BD96801 as well as a termination regulator BD35395. The PMIC has preconfigured OTP settings which defines all required power settings, such as output voltages, protection levels and voltage up- and down-sequencing.

  • Page 8: Power Tree

    User’s Guide 3.3. Power tree Figure 2 shows an overview of the overall system, indicating the required voltages to power up the key components. Figure 2: power tree © 2022 ROHM Co., Ltd. 65UG018E Rev.001 8/36 July 2022...

  • Page 9: Led Indications

    CN130: add jumper 3-4 (EN). The PMIC is enabled. Now the red LED100 (INTB), red LED101 (ERRB) and red LED102 (PRSTB) are off. The blue LED60 is on. The blue LED303 (INIT) and blue LED304 (DONE) should light up, too. Also, LED310 and LED302 should remain off. That © 2022 ROHM Co., Ltd. 65UG018E Rev.001 9/36...

  • Page 10: Onboard Switches

    Low level and pin2 can be set to either level via SW303. Hence, available configurations of M[2:0] are “001” (= Master SPI, SW303 is in position “Low”) and “101” (= JTAG, SW303 is in position “High”):1 See “7 Series FPGAs Configuration User Guide”, UG470 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 10/36...

  • Page 11: Pmic Status Pins

    3.7. PMIC status pins The PMIC BD96801 has some status output pins that can be connected to free input pins of the Spartan-7 FPGA: INTB: this open drain pin is asserted to low level when PMIC indicates a warning. It can be connected to pin F15 of the FPGA by inserting the 0R resistor R563.

  • Page 12: General Purpose Fpga I/Os

    Pin 16 IO_L12N_T1_MRCC_14 IO_L7N_T1_D10_14 Pin 7 Pin 17 IO_L13P_T2_MRCC_14 IO_L8P_T1_D11_14 Pin 8 Pin 18 IO_L13N_T2_MRCC_14 IO_L8N_T1_D12_14 Pin 9 Pin 19 IO_L14P_T2_SRCC_14 Pin 10 Pin 20 V_1.8 Table 4: Pin-out connector CN502 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 12/36 July 2022...

  • Page 13: Jtag Interface

    Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 Pin 11 Pin 12 open Pin 13 Pin 14 open Figure 8: Pin-out JTAG connector © 2022 ROHM Co., Ltd. 65UG018E Rev.001 13/36 July 2022...

  • Page 14: I2C Interface

    The test points TP132 to TP134 offer access to the I2C bus which may be needed to read out registers (e.g., status registers) of the PMIC BD96801. It is also useful to change settings of the PMIC BD96801 by programming the onboard EEPROM. Attention: be careful when changing settings! This may lead to the destruction of the board if not applied carefully.
  • Page 15 PCB. Insert a loop wire instead. The current probe can measure the current through the wire now. The result should look like the measurement below: Figure 12: measuring core voltage and core current © 2022 ROHM Co., Ltd. 65UG018E Rev.001 15/36...

  • Page 16: Power Sequencing

    TP3 (V_5.0) and TP4 (GND). PMIC BD96801: the PMIC starts up when first inserting a jumper between pins 1-2 of connector CN130, and then a jumper between pins 3-4 of the same connector. When the PMIC has successfully started-up, LED 100 to LED102 should be off and LED60 should be on.
  • Page 17 EN-jumper (position 3-4). For further diagnosis: connect external I2C-USB controller board to Spartan-7 EVK and to PC/laptop. Read status registers of PMIC BD96801. PMIC 7-bit slave address is 0x60h. See data sheet of PMIC for register details. LED301 or LED302 is on, or Press SW304 (PROGRAM_B) to re-transfer FPGA code from onboard Flash memory to Xilinx LED303 or LED304 is off.

  • Page 18: Schematic And Bom

    User’s Guide BD96801-SPA7-EVK-301 7. Schematic and BOM Figure 14: schematic of power supply stage 1/2 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 18/36 July 2022...
  • Page 19 User’s Guide BD96801-SPA7-EVK-301 Figure 15: schematic of power supply stage 2/2 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 19/36 July 2022...
  • Page 20 User’s Guide BD96801-SPA7-EVK-301 Figure 16: schematic of system circuit 1/4 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 20/36 July 2022...
  • Page 21 User’s Guide BD96801-SPA7-EVK-301 Figure 17: schematic of system circuit 2/4 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 21/36 July 2022...
  • Page 22 User’s Guide BD96801-SPA7-EVK-301 Figure 18: schematic of system circuit 3/4 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 22/36 July 2022...
  • Page 23 User’s Guide BD96801-SPA7-EVK-301 Figure 19: schematic of system circuit 4/4 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 23/36 July 2022...
  • Page 24 20% AEC-Q2 00 LEDs Mini-mold Chip LED, blue, LED60, LED301, LED303, LED304 1.6mm x 0.8mm Rohm SMLEN3BC8TT86Q LED100, LED101, LED102, LED302, LED501, LED502 chip LED, red, 1.6mm x 0.8mm Rohm SML-E12V8WT86 (NPQR) © 2022 ROHM Co., Ltd. 65UG018E Rev.001 24/36 July 2022...
  • Page 25 R507, R508, R509, R510, R511, R512, Res Thick Film 0402 100 Ohm R513, R514, R515, R517, R518, R519, 5% 1/16W ±200ppm/°C Molded ROHM MCR01MZPJ101 R521, R522, R523, R524, R526, R527, SMD SMD Paper T/R © 2022 ROHM Co., Ltd. 65UG018E Rev.001 25/36 July 2022...
  • Page 26 C5, C20, C22, C43, C45, C101, C103, C132, C133, R3, R5, R20, R21, R53, Not placed / not mounted R54, R55, R563, R564, R565 Table 7: bill of material (BOM) © 2022 ROHM Co., Ltd. 65UG018E Rev.001 26/36 July 2022...

  • Page 27: Pcb Layout

    User’s Guide BD96801-SPA7-EVK-301 8. PCB layout Figure 20: top layer © 2022 ROHM Co., Ltd. 65UG018E Rev.001 27/36 July 2022...
  • Page 28 User’s Guide BD96801-SPA7-EVK-301 Figure 21: inner layer 1 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 28/36 July 2022...
  • Page 29 User’s Guide BD96801-SPA7-EVK-301 Figure 22: inner layer 2 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 29/36 July 2022...
  • Page 30 User’s Guide BD96801-SPA7-EVK-301 Figure 23: inner layer 3 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 30/36 July 2022...
  • Page 31 User’s Guide BD96801-SPA7-EVK-301 Figure 24: inner layer 4 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 31/36 July 2022...
  • Page 32 User’s Guide BD96801-SPA7-EVK-301 Figure 25: inner layer 5 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 32/36 July 2022...
  • Page 33 User’s Guide BD96801-SPA7-EVK-301 Figure 26: inner layer 6 © 2022 ROHM Co., Ltd. 65UG018E Rev.001 33/36 July 2022...
  • Page 34 User’s Guide BD96801-SPA7-EVK-301 Figure 27: bottom layer © 2022 ROHM Co., Ltd. 65UG018E Rev.001 34/36 July 2022...
  • Page 35 User’s Guide BD96801-SPA7-EVK-301 Figure 28: silkscreen top © 2022 ROHM Co., Ltd. 65UG018E Rev.001 35/36 July 2022...
  • Page 36 User’s Guide BD96801-SPA7-EVK-301 Figure 29: silkscreen bottom © 2022 ROHM Co., Ltd. 65UG018E Rev.001 36/36 July 2022...
  • Page 37 Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM or any other parties. ROHM shall have no responsibility whatsoever for any dispute arising out of the use of such technical information.

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