Renesas RC2121 A Series Manual
  1. Manuals
  2. Brands
  3. Renesas Manuals
  4. Motherboard
  5. RC2121 A Series
  6. Manual
Renesas RC2121 A Series Manual

Renesas RC2121 A Series Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
RC2121xA (AutoClock)
Evaluation Board
The RC2121xA (RC21211A, RC21212A, RC21213A,
RC21214A [AutoClock™]) Evaluation Board (EVB) is
designed to support users evaluating the clock
generation in synthesizer mode for PCIe Gen
compliance and commercial automotive applications.
Specifications
169fs RMS phase jitter (10kHz–20MHz,
■
156.25MHz).
PCIe Gen6 Common Clock (CC) 27fs RMS
■
Board Contents
Items shipped with EVB kit:
EVB
■
USB cable
■
SMA
SMA
SMA
SMA
USB Port
FTDI Chip
LDO 3.3V
LDO 2.5V
LDO 1.8V
R31UH0030EU0100 Rev.1.00
Apr 25, 2024
XIN0/REFIN0
XOUT0/REFIN0b
XIN0/REFIN0/GPI0
XOUT0/REFIN0b/GPI1
SDA
SCL
DIP
INT[GPIO]
SW1
FAULT[GPIO]
SEL[1:0] [GPIO]
DIP
OE[2:0] [GPIO]
SW1

Figure 1. Board Block Diagram

Evaluation Board Manual
Features
PCIe SRIS and SRNS support
■
1kHz to 650MHz (differential) and 1kHz to
■
200MHz (single-ended) outputs
LVCMOS, LVDS or Low-Power HCSL output types
■
with simple AC-coupling to LVPECL and CML.
LP-HCSL integrates terminations.
Seven programmable general-purpose
■
input/outputs (GPIO)
1MHz I
2
C serial port
■
Multiple configurations can be stored in internal
■
One-Time Programmable (OTP) memory.
1.8V or 3.3V operation
■
Crystal or crystal overdrive (REFIN) via SMA
■
Available sense lines on crystal overdrive.
■
Test points on Outputs for Hi-Z probes.
■
Jumper selectable voltage setting for
■
3.3V/2.5V/1.8V powered from USB
AutoClock
APLL
LPFOD0
LPFOD1
IOD0
IOD1
HPFOD0
HPFOD1
I2C
HPFOD2
Registers
OTP
OUT0
OUT0b
OUT1
OUT1b
OUT2
OUT2b
OUT3
OUT3b
OUT4
OUT4b
OUT5
OUT5b
OUT6
OUT6b
OUT7
OUT7b
OUT8
OUT8b
OUT9
OUT9b
OUT10
OUT10b
OUT11
OUT11b
Page 1
© 2024 Renesas Electronics

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the RC2121 A Series and is the answer not in the manual?

Questions and answers

Related Manuals for Renesas RC2121 A Series

Summary of Contents for Renesas RC2121 A Series

  • Page 1: Figure 1. Board Block Diagram

    FTDI Chip OUT8 HPFOD2 OUT8b OUT9 LDO 3.3V INT[GPIO] Registers OUT9b FAULT[GPIO] OUT10 OUT10b LDO 2.5V SEL[1:0] [GPIO] OUT11 OUT11b LDO 1.8V OE[2:0] [GPIO] Figure 1. Board Block Diagram R31UH0030EU0100 Rev.1.00 Page 1 Apr 25, 2024 © 2024 Renesas Electronics...

  • Page 2: Table Of Contents

    1.2.5 Outputs ..........................13 1.2.6 Power and USB connection to Computer Host..............13 1.2.7 Renesas Integrated Circuit Toolbox (RICBox)..............14 1.2.8 Programming an RC2121xA Device using RICBox Software ..........14 Evaluation Board Components ......................... 18 Layout Guidelines ..........................18 2.1.1 ePAD ............................
  • Page 3 RC2121xA Evaluation Board Manual Figure 15. Select Product Family and Variant ...................... 15 Figure 16. Inputs Wizard Page ..........................15 Figure 17. Outputs Wizard Page .......................... 16 Figure 18. Advanced Output Settings ........................16 Figure 19. Configuration Summary ........................17 Figure 20.

  • Page 4: Functional Description

    RC21213A and RC21214A devices using clock generation in synthesizer mode for PCIe Gen compliance. When the EVB is connected via USB to the user’s computer running Renesas Integrated Circuit Toolbox (RICBox™) software, RC2121xA devices can be configured in various frequencies with best-in-class commercial performance.

  • Page 5: Figure 2. Rc21213/Rc21214 Autoclock Evaluation Board

    RC2121xA Evaluation Board Manual Figure 2. RC21213/RC21214 AutoClock Evaluation Board Refer to Table 2 for the RC21213A/RC21214A evaluation board pin descriptions and functions. Table 2. RC21213A/RC21214A EVB Pins and Functions On-Board Connector Item Name Function Label RC21213/RC21214 Evaluation device, 5 × 5 × 0.75 mm 40-pin VFQFPN. C for FTDI or Aardvark 6-pin header of I C connector for SCL and SDA pins.
  • Page 6 RC2121xA Evaluation Board Manual On-Board Connector Item Name Function Label GPIO5, GPIO6 J11, J12 GPIO5 and GPIO6 SMA Connector SMA connectors for differential outputs using VDDO1 power rail (populated with a pair of SMA connector): Test Points for OUT1 J16, J20 J16, J20 for OUT1 SMA connectors for differential outputs using VDDO2 power rail (populated with a pair of SMA connector):...
  • Page 7 RC2121xA Evaluation Board Manual On-Board Connector Item Name Function Label Power source selector. Select in 3.3V, 1.8V or external VDDR power VDD_J for reference input circuit power. Power source selector. Select in 3.3V, 1.8V or external VDDD power VDD_J for digital circuit power. Power source selector.

  • Page 8: Figure 3. Rc21211/Rc21212 Autoclock Evaluation Board

    RC2121xA Evaluation Board Manual Figure 3. RC21211/RC21212 AutoClock Evaluation Board Refer to Table 3 for the RC21211A/RC21212A evaluation board pin descriptions and functions. Table 3. RC21211A/RC21212A – EVB Pins and Functions On-Board Connector Item Name Function Label RC21212A Evaluation device, 6 × 6 × 0.9 mm 48-VFQFPN. C for FTDI or Aardvark 6 pins header of I C connector for SCL and SDA pins.
  • Page 9 RC2121xA Evaluation Board Manual On-Board Connector Item Name Function Label Differential REF clock input positive on J29 and negative on XIN1 / XOUT1 J31 / CMOS single-ended reference clock input. If J29 is J6, J7 connected to XIN1 as REFIN single-ended, J31 must be left REFIN1 / REFIN1B unconnected.

  • Page 10: On Board Crystal Pad And Reference Input

    RC2121xA Evaluation Board Manual On-Board Connector Item Name Function Label Power source selector. Select 3.3V, 2.5V, 1.8V or external VDDO3 power VDD_J for OUT Bank 3. Power source selector. Select 3.3V, 2.5V, 1.8V or external VDDO4 power VDD_J for OUT Bank 4. Power source selector.

  • Page 11: Serial Connection

    RC2121xA Evaluation Board Manual 1.2.3 Serial Connection The EVB can be connected to a computer via a USB-C connector. The on-board USB-to-MPSSE Bridge (FTDI FT232HQ) can handle the data communication. The +5V from the USB-C powers the on-board regulators or external +5V via banana connector.

  • Page 12: Gpi/Gpio Dip Switch Selectors

    RC2121xA Evaluation Board Manual 1.2.4 GPI/GPIO DIP Switch Selectors The EVB has two DIP switches (SW1, SW2) to support GPIO and GPI pins on an RC21211/RC21212 device. The middle position leaves the pin open so GPIO0, GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, and GPIO6 could be configured to be 2-level (Hi / Low) as default selection on DIP switches.

  • Page 13: Outputs

    RC2121xA Evaluation Board Manual 1.2.5 Outputs For RC21211/RC21212, twelve differential output pairs can be programmed (out_mode) to LVDS, LP-HCSL or LVCMOS logic type. LVCMOS is a single-ended logic type, and the output pair will essentially be two CMOS outputs of the same frequency. LP-HCSL is the most versatile output because it can be customized.

  • Page 14: Renesas Integrated Circuit Toolbox (Ricbox)

    1.2.7 Renesas Integrated Circuit Toolbox (RICBox) The Renesas Integrated Circuit Toolbox (RICBox) software can program RC2121xA devices on the EVB using either the on board FTDI chip or Aardvark tool. RICBox provides a user-friendly interface to support programming configurations into an RC2121xA device on the board. For more information about RICBox, see Renesas IC Toolbox User Guide.

  • Page 15: Figure 15. Select Product Family And Variant

    RC2121xA Evaluation Board Manual 4. Select the AutoClock product family, then select a product variant (part number) and click OK. Figure 15. Select Product Family and Variant 5. On the Inputs wizard page, mode for XTAL0/1 REFIN0/1 can be set (Xtal, Differential, Single-ended). Expected input frequency needs to be entered.

  • Page 16: Figure 17. Outputs Wizard Page

    RC2121xA Evaluation Board Manual 6. Configure the output bank settings which includes the divider source (LPFOD0/1, IOD0/1, or HPFOD0/1/2), output frequency and output mode (LPHCSL, LVDS, and LVCMOS). If a bank is to be unused, use the “Power Down” check box to turn off the bank. Click on the settings icon to adjust amplitude, impedance, and slew rate for each output (see Figure 18).

  • Page 17: Figure 19. Configuration Summary

    RC2121xA Evaluation Board Manual 7. Click the Finish button (see Figure 17) to view the summary of the configuration. Figure 19. Configuration Summary 8. To go back to any of the previous wizard pages, click the wizard icon. 9. RICBox is now ready to connect to an RC2121xA device. Clock on the Not Connected button in the lower right part of RICBox tool.

  • Page 18: Evaluation Board Components

    RC2121xA Evaluation Board Manual 11. View the block diagram by pushing the Block Diagram icon. Figure 22. Block Diagram 2. Evaluation Board Components Layout Guidelines Use the following list of items and their guidelines when designing the layout around the RC2121xA devices. 2.1.1 ePAD For maximizing heat removal, a land pattern must be incorporated on the PCB within the footprint of the package...

  • Page 19: Crystal/Reference Input

    RC2121xA Evaluation Board Manual Figure 23. PCB Assembly for Exposed Pad Thermal Release Path – Side View Table 6.Thermal Characteristics (40-pin) Symbol Parameter Value Unit θ Junction to Device Case Thermal Coefficient 26.9 θ Junction to Board Thermal Coefficient Junction to Ambient Air Thermal Coefficient (still air) 30.5 °C/W Junction to Ambient Air Thermal Coefficient (1m/s airflow)

  • Page 20: Serial Connection

    RC2121xA Evaluation Board Manual 2.1.3 Serial Connection The serial interface can function from 1.8V to 3.3V for VDDD. If serial communication is needed, the SCL and SDA pull-up resistor needs to connect to VDDD. If needed, use a level translator. Acceptable values for pull-up resistors are 1kΩ...

  • Page 21: Board Layout

    RC2121xA Evaluation Board Manual Board Layout Figure 25. Layer 1 – Top R31UH0030EU0100 Rev.1.00 Page 21 Apr 25, 2024...

  • Page 22: Figure 26. Layer 2 - Signal

    RC2121xA Evaluation Board Manual Figure 26. Layer 2 – Signal R31UH0030EU0100 Rev.1.00 Page 22 Apr 25, 2024...

  • Page 23: Figure 27. Layer 3 - Clock Signals

    RC2121xA Evaluation Board Manual Figure 27. Layer 3 – Clock Signals R31UH0030EU0100 Rev.1.00 Page 23 Apr 25, 2024...

  • Page 24: Figure 28. Layer 4 - Gnd Plane

    RC2121xA Evaluation Board Manual Figure 28. Layer 4 – GND Plane R31UH0030EU0100 Rev.1.00 Page 24 Apr 25, 2024...

  • Page 25: Figure 29. Layer 5 - Power Plane

    RC2121xA Evaluation Board Manual Figure 29. Layer 5 – Power Plane R31UH0030EU0100 Rev.1.00 Page 25 Apr 25, 2024...

  • Page 26: Figure 30. Layer 6 - Power Plane

    RC2121xA Evaluation Board Manual Figure 30. Layer 6 – Power Plane R31UH0030EU0100 Rev.1.00 Page 26 Apr 25, 2024...

  • Page 27: Figure 31. Layer 7 - Ground Plane

    RC2121xA Evaluation Board Manual Figure 31. Layer 7 – Ground Plane R31UH0030EU0100 Rev.1.00 Page 27 Apr 25, 2024...

  • Page 28: Figure 32. Layer 8 - Signal

    RC2121xA Evaluation Board Manual Figure 32. Layer 8 – Signal R31UH0030EU0100 Rev.1.00 Page 28 Apr 25, 2024...

  • Page 29: Figure 33. Layer 9 - Ground Plane

    RC2121xA Evaluation Board Manual Figure 33. Layer 9 – Ground Plane R31UH0030EU0100 Rev.1.00 Page 29 Apr 25, 2024...

  • Page 30: Figure 34. Layer 10 - Bottom

    RC2121xA Evaluation Board Manual Figure 34. Layer 10 – Bottom R31UH0030EU0100 Rev.1.00 Page 30 Apr 25, 2024...

  • Page 31: Quick Start Guide

    'VDD_J'. 3. Install the RICBox software. You'll find all the instructions in the Renesas IC Toolbox Software Manual. 4. After installing, configure your board as explained in section 1.2.7. 5. Program the board as per the configuration. This configuration can be saved in “.rbs” format.
  • Page 32 EE_SCL EE_SDA...
  • Page 37 EE_SCL EE_SDA...
  • Page 42 Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products.

This manual is also suitable for:

Rc21211aRc21212aRc21213aRc21214a

Table of Contents