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REV. 1.0.0
1.0 INTRODUCTION
This user's manual is for the XR21V1414 evaluation board. It will describe the hardware setup required to
operate the part.
2.0 OVERVIEW
The XR21V1414 evaluation board has one 48-TQFP package on it.
evaluation board
F
1. T
IGURE
Downloaded from
Elcodis.com
electronic components distributor
layout.
V
XR21V1414 E
OP
IEW OF
XR21V1414 EVALUATION BOARD USER'S MANUAL
B
L
VALUATION
OARD
AYOUT
1
Figure 1
shows a top view of XR21V1414
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Summary of Contents for Exar XR21V1414
- Page 1 XR21V1414 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 1.0 INTRODUCTION This user’s manual is for the XR21V1414 evaluation board. It will describe the hardware setup required to operate the part. 2.0 OVERVIEW The XR21V1414 evaluation board has one 48-TQFP package on it.
- Page 2 XR21V1414 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 Figure 2 shows a bottom view of XR21V1414 evaluation board layout. 2. B XR21V1414 E IGURE OTTOM IEW OF VALUATION OARD AYOUT Downloaded from Elcodis.com electronic components distributor...
- Page 3 1: C XR21V1414 E ABLE OMPONENTS VALUATION OARD OCATION UNCTION XRP6657IHBTR-F-DFN6 Exar’s voltage converter to step down voltage from 5V to 3.3V. AT24C02B-PU-DIP8 I2C EEPROM. XR21V1414IM48 Exar’s 4 channel USB UART. Bottom NC7SZ14M5X-SOT-23-5 Invert LowPower (suspend) signal. Bottom SN74LVC2G53DCTR-SM8 Switch UART TXA signal into either RS-232 or RS-485 transceiver.
- Page 4 XR21V1414 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 1: C XR21V1414 E ABLE OMPONENTS VALUATION OARD OCATION UNCTION SP3497EEN-L-NSOIC14 Exar’s RS-485 transceiver for channel D. CON1 PJ-002A External power input. CON2 690-004-621-023 USB B-Type connector. Communication with USB host (USBD+, USBD-) and power source for evaluation board...
- Page 5 XR21V1414 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 Jumper Settings 2.2.1 Common jumpers Common jumpers are those jumpers which should be set the same for both RS-232 and RS-485 mode. The Table 2 shows the common jumpers setting on the evaluation board:...
- Page 6 XR21V1414 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 2: C ABLE OMMON UMPERS ETTINGS UMPERS OCATION UNCTIONS OMMENTS JP28 UART side Channel C external loop- Jumper in enables external loopback for channel C in the back header UART side : External loopback via this jumper can only be performed when the transceiver has been disabled.
- Page 7 XR21V1414 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 2.2.3 RS-232 mode jumpers (Default setting is RS-232 mode) The XR21V1414 evaluation board is set in RS-232 mode by default. The following Table 5 jumper settings apply to the RS-232 mode: 5: J...
- Page 8 XR21V1414 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 6: J RS-485 M ABLE UMPER ETTINGS UMPERS OCATION UNCTIONS OMMENTS JP16 Channel B select for half duplex or full Jumper in 1&2 selects for half duplex mode duplex mode Jumper in 2&3 selects for full duplex mode...
- Page 9 REV. 1.0.0 NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement.
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