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April 2016
GENERAL DESCRIPTION
The XR77XXEVB-XCM-V80 (Exar Configuration
Module or XCM) is a board that is designed to
act as a USB to I
C bridge for communication
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between a PC running PowerArchitect
configuration and design software and one of
Exar's Universal PMICs. The PMIC can either
be on an Exar evaluation board or on a
customer board. On the right opposite side of
the XCM is a 10-pin connector which is used to
connect to the user's system board in order to
communicate to any of the supported PMICs.
The XCM includes a µC with on-board flash so
that when powered from the system board, it
can act as a boot loader without the need to
have a PC connected.
This board is compatible with: XR77103,
XRP7704, XRP7708, XRP7740, XRP7713, and
XRP7714.
EVALUATION BOARD SCHEMATICS
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
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TM
Figure 1: XR77XXEVB-XCM-V80 Evaluation Board Schematics
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FEATURES
• USB to I
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C Communication for
Programmable PMIC Devices
• Boot Loader Functionality
− Avoids programming the NVM until final
configuration known
• Powered by USB or System Board
• Enables Rapid Prototyping
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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Table of Contents
Summary of Contents for Exar XR77XXEVB-XCM-V80
- Page 1 Exar’s Universal PMICs. The PMIC can either be on an Exar evaluation board or on a customer board. On the right opposite side of the XCM is a 10-pin connector which is used to connect to the user’s system board in order to...
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Page 2: Pin Assignment
Connects to the EN pin of the XRP77XX. This is an input to the XCM board. ENABLE JP4 PIN10 Can connect to voltages from 4.5V to 30V ORDERING INFORMATION Part Number Description XR77XXEVB-XCM-V80 Exar Configuration Module for Power Architect 4 Support © 2016 Exar Corporation Rev. 1.0.0... - Page 3 Low to High (not available for a system intended to interact with the XR77103). programmable features of the PMIC device on the system board. DS1: USB Activity Flashes based upon the USB activity between the XCM and the PC. © 2016 Exar Corporation Rev. 1.0.0...
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Page 4: Standalone Mode
NVM registers maximum input voltage of 30V, so whatever for display in PowerArchitect voltage source is powering the PMIC device on the system board can be connected to the XCM. © 2016 Exar Corporation Rev. 1.0.0... - Page 5 • Another possibility if communication is not working is a long ground loop causing noise. One could put an isolator on the I2C line, but using a notebook computer with the power adapter disconnected works as well. © 2016 Exar Corporation Rev. 1.0.0...
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Page 6: Evaluation Board Schematics
EVALUATION BOARD SCHEMATICS © 2016 Exar Corporation Rev. 1.0.0... -
Page 7: Bill Of Material
USB_B_mini CONN RECEPT MINIUSB R/A 5POS SMD Wurth Elektronik 65100516121 JP1, JP4 CONN Header 5x2, 0.1 inch Wurth Elektronik 61308021121 HDR2X5 JP2, JP3 CONN HEADER 3POS 0.1 VERT GOLD Wurth Elektronik 61304011121 HDR1X3 T9, T10, T11, TEST POINT © 2016 Exar Corporation Rev. 1.0.0... -
Page 8: Evaluation Board Layout
EVALUATION BOARD LAYOUT © 2016 Exar Corporation Rev. 1.0.0... -
Page 9: Document Revision History
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness.
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