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Setup Instructions for the ISL6271A
Evaluation Kit
Eval Board Setup
Application Note
October 4, 2004
AN1139.1
READ ALL INSTRUCTIONS BEFORE APPLYING POWER OR CONNECTING
CABLES
The ISL6271A is a power management integrated circuit (PMIC) designed to provide the low-voltage requirements
for the Bulverde XScale processor. There are three(3) such voltages generated by the PMIC:
1)
2)
3)
.85V-1.6V core voltage under DVM or VID control
1.3V PLL voltage, and
1.1V SRAM voltage.
All three outputs are enabled/disabled simultaneously by a common Power Enable (EN) signal from the processor.
Various control and diagnostic functions attend to the orderly sequencing and dynamic control of the PMIC. A
complete functional description of the PMIC can be found in the ISL6271A data sheet (provided).
The ISL6271A evaluation board provides a means to explore and validate the functional capabilities of the ISL6271A
XScale Regulator. The board was designed to have an intuitive layout flow with strapping options to aid in ease of
instrumenting and testing. There is a left-to-right flow of input-to-output, with external inputs coming onto the board
from the left side and the outputs on the right side. LED indicator functions are to the top side of the layout and the
transient load-generator option is in the lower right corner of the board with various strapping options. The core
regulator output can be controlled by either an externally connected I2C interface module (provided) or on-board
static VID switches. Appropriate cabling is provided to make the necessary connections with external testing
equipment.
The following instructions are not intended to effect an exhaustive evaluation of the ISL6271A . They are intended as
a guide into an introductory suite of tests with which the evaluator can gain enough confidence and skill to go deeper
in functional exploration/validation.
Test Equipment Required:
Multi-channel Storage Oscilloscope (with appropriate probes)
Digital Multi-meters (up to 3)
Dual Low-Voltage Adjustable Power Supply
Load - electronic or resistors (0-1A)
PC with available USB port
USB cable
USB/I2C interface module and I2C cable (provided with eval kit)
USB/I2C Software (downloadable from www. intersil .com )
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright ? Intersil Americas Inc. 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners
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