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Linear Technology DC2430A Demo Manual

Linduino spi 1:8 expander shield
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DESCRIPTION
Demonstration circuit 2430A is a Linduino
Expander Shield. The DC2430A shield routes SPI and
2
I
C signals from one DC2026 to one of eight selectable
QuikEval™ connector sites. When a DC2430A QuikEval
connector site is selected, an LED will illuminate next to
the active site. The DC2430A shield comes with a mounted
DC2026 as shown Figure 1.
DC2430A site selection can be controlled manually or
through software. By default, Manual Site Select mode
is enabled, which is controlled by the on-board rotary
switch. LED D8 illuminates when Manual Site Select mode
is enabled. For Software Site Select mode, example code
is provided in the LTSketchbook.
J0, QuikEval
CONNECTOR SITE
J1, QuikEval
CONNECTOR SITE
J2, QuikEval
CONNECTOR SITE
Arrow.com.
Downloaded from
SPI 1:8
®
J3 QuikEval
CONNECTOR SITE
JP3, J20 TO J22
LINEAR TECHNOLOGY ParallelSync
SUPPORT CIRCUITRY
Figure 1. DC2430A Connections
DEMO MANUAL DC2430A
Linduino SPI 1:8
Expander Shield
The DC2430A provides ParallelSync™ support circuitry
which aligns an asynchronous digital signal to the rising
edge of a reference clock. This circuitry will allow for an
easy demonstration of ParallelSync with Linear Technol-
ogy's clock generation and distribution products, such
as the LTC6951.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2430A
L, LT, LTC, LTM, Linear Technology, the Linear logo and Linduino are registered trademarks
and QuikEval and ParalleSync are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Linduino USB
CONNECTION TO PC
Linduino (DC2026)
MOUNTED TO DC2430
J4 QuikEval
CONNECTOR SITE
J7, QuikEval
CONNECTOR SITE
J6, QuikEval
CONNECTOR SITE
D8, LED, ROTARY
SWITCH ENABLED
INDICATOR
J5, QuikEval
CONNECTOR SITE
SW1, ROTARY
SWITCH MANUAL
SITE SELECT MODE
dc2430af
1

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Summary of Contents for Linear Technology DC2430A

  • Page 1 By default, Manual Site Select mode L, LT, LTC, LTM, Linear Technology, the Linear logo and Linduino are registered trademarks is enabled, which is controlled by the on-board rotary and QuikEval and ParalleSync are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

  • Page 2: Quick Start Procedure

    DEMO MANUAL DC2430A QUICK START PROCEDURE The DC2430A example is based off of the LTC6951 data 6. Set DC1954 jumpers to the following state sheet’s ParallelSync Typical Application circuit. This ex- a. OUTSEL0 (JP1): HIGH ample requires a 100MHz reference, one DC2430A (with b.
  • Page 3 J14 (LTC6951) TO DC2248 #2 J14 (LTC6951) TO DC1954 J12 (LTC6954-2) FROM DC1954 J6 (LTC6954-2) TO DC2248 #2 J13 (LTC6951) TO DC2248 #1 J13 (LTC6951) Figure 2. ParallelSync Setup, DC2430A TERMINATE UNUSED LTC6954 OUTPUTS FROM DC2430 SYNC2 FROM DC2430 SYNC1 – SYNC...
  • Page 4 DEMO MANUAL DC2430A QUICK START PROCEDURE SELECT CAL BIT Figure 4. LTC6951 Settings Figure 5. LTC6954-2 Settings dc2430af Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from...
  • Page 5 JP3 – Pin 5 (GPIO7) Controlled by the DC2026’s digital pin 7. GPIO7’s signal level has been level adjusted and can be connected directly to DC2430A JP3’s SYNC pin. By default GPIO7 is programmed to a low state. dc2430af Arrow.com.
  • Page 6 DEMO MANUAL DC2430A DC2430A FEATURES Figure 6. Locating ParallelSync Example Code 1. COMPILE AND LOAD NOT REQUIRED UNLESS DEFAULT SKETCH OVER WRITTEN 2. OPEN SERIAL MONITOR 3. TYPE “B” <ENTER> 4. ParallelSync DONE! Figure 6. ParallelSync Example – Software Mode Site Select dc2430af Arrow.com.

  • Page 7: Parts List

    DEMO MANUAL DC2430A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER C1-C10 CAP ., 0.1μF, X7R, 25V,10%, 0402 MURATA, GRM155R71E104KE14D D0-D7 LED, GREEN, LED-ROHM-SML-01 ROHM, SML-012P8TT86 LED, RED, LED-ROHM-SML-01 ROHM, SML-012V8TT86 JP1, JP2 CONN., HEADER, MALE, 1×3, 2mm, THT WURTH ELEKTRONIK, 62000311121 CONN., HEADER, MALE, 2×4, 2mm, THT...

  • Page 8: Schematic Diagram

    DEMO MANUAL DC2430A SCHEMATIC DIAGRAM dc2430af Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from...
  • Page 9 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
  • Page 10 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.