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REV. 1.0.0
INTRODUCTION
This user's manual is for the XRA1403/1405 16-bit evaluation board. Table 1 shows the different devices and
packages that the evaluation board supports. This user's manual will describe the hardware setup required to
operate the different packages.
1.0 QUICK START
To verify communication with the GPIO expander, the following steps are recommended:
1.1
Connect external +5V power supply to J8 pin 1
1.2
Connect J12 pin 13 and 14 to ground of external power supply
1.3
Connect to MCU SPI interface for:
SPI clock (SCK_SCL signal at J5 pin11)
SO (SO_SPI signal at J5 pin17)
SI (SI_SPI signal at J5 pin21)
CS# (CS#_SPI signal at J5 pin19)
1.4
From the MCU, write the following registers:
GCR1 = 0x00
GCR2 = 0x00
If the LEDs turn on, the communication with the GPIO expander is successful.
To disable connection to LEDs, remove jumpers on J28, J29, J30 and J31. Connect to external inputs or
outputs at J3 and J4.
2.0 HARDWARE SETUP
2.1
Packages description
The evaluation board supports all 4 packages of the XRA1403 and XRA1405. The ordering part number,
package and location on the board is shown below in Table 1. Table 2 lists the evaluation board ordering part
numbers.
O
P
N
RDERING
ART
UMBER
XRA1403IL24-F
XRA1403IG24-F
XRA1405IL24-F
XRA1405IG24-F
XRA1403/1405 EVALUATION BOARD USER'S MANUAL
T
1: P
ABLE
P
ACKAGE
24-pin QFN
24-pin TSSOP
24-pin QFN
24-pin TSSOP
T
2: E
B
ABLE
VALUATION
OARD
P
ART
XRA1403IL24-0B-EB
XRA1403IG24-0B-EB
XRA1405IL24-0B-EB
XRA1405IG24-0B-EB
L
ACKAGE
IST
O
P
N
RDERING
ART
UMBERS
N
UMBER
1
L
OCATION
U4
U5
U4
U5
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Summary of Contents for Exar XRA1403IL24-F
- Page 1 Table 1. Table 2 lists the evaluation board ordering part numbers. 1: P ABLE ACKAGE RDERING UMBER ACKAGE OCATION XRA1403IL24-F 24-pin QFN XRA1403IG24-F 24-pin TSSOP XRA1405IL24-F 24-pin QFN XRA1405IG24-F 24-pin TSSOP 2: E...
- Page 2 XRA1403/1405 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 Jumper Settings 2.2.1 Common Jumpers The following jumpers apply to all the 4 packages of XRA1403 and XRA1405: 3: C ABLE OMMON UMPER ETTINGS UMPERS UNCTIONS OMMENTS Selects the supply voltage to generate 1&2 selects +5V (default, Pin 1 -- Test point for external +5V) the +1.8V power supply for the board 2&3 selects +P...
- Page 3 XRA1403/1405 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 2.2.2 XRA1403IL24-F The following jumpers apply to the XRA1403IL24-F: 4: J XRA1403IL24-F ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Header for connecting GPIO[7:0] signals Jumper in pin 1 & J29 pin1 connects GPIO0 to LED of QFN package Jumper in pin 2 &...
- Page 4 20 of 24-pin QFN package Jumper in 1&3 selects SDA signal Jumper in 3&5 selects SDA signal Selects the supply voltage for +VDDP for Installed but not used for XRA1403IL24-F 24-pin QFN packages Jumper in 1&2 selects +VDDP Jumper in 2&3 selects +VDDP Selects the corresponding signal for pin Jumper in 2&3 selects CS# signal (default)
- Page 5 XRA1403/1405 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 2.2.3 XRA1403IG24-F The following jumpers apply to the XR1403IG24-F: 5: J XRA1403IG24-F ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Header for connecting GPIO[7:0] signals Installed but not used of QFN package Header for connecting GPIO[7:0] signals Jumper in 1&2 connects GPIO0 to LED of TSSOP package to LEDs Jumper in 3&4 connects GPIO1 to LED...
- Page 6 XRA1403/1405 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 5: J XRA1403IG24-F ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Selects the corresponding signal for pin 3 Installed but not used for XRA1403IG24-F of 24-pin TSSOP package Jumper in 1&2 selects RESET# signal Jumper in 2&3 selects SI signal Selects the corresponding signal for pin Installed but not used for XRA1403IG24-F 23 of 24-pin TSSOP package...
- Page 7 XRA1403/1405 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 2.2.4 XRA1405IL24-F The following jumpers apply to the XRA1405IL24-F: 6: J XRA1405IL24-F ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Header for connecting GPIO[7:0] signals Jumper in pin 1 & J29 pin 1 connects GPIO0 to LED of QFN package Jumper in pin 2 &...
- Page 8 XRA1403/1405 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 6: J XRA1405IL24-F ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Selects the corresponding signal for pin Installed but not used for XRA1405IL24-F 23 of 24-pin QFN package Jumper in 1&3 selects A1 signal Jumper in 3&5 selects A1 signal Jumper in 2&4 selects SI signal Selects the corresponding signal for pin Installed but not used for XRA1405IL24-F...
- Page 9 XRA1403/1405 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 2.2.5 XRA1405IG24-F The following jumpers apply to the XR1405IG24-F: 7: J XRA1405IG24-F ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Header for connecting GPIO[7:0] signals Installed but not used of QFN package Header for connecting GPIO[7:0] signals Jumper in 1&2 connects GPIO0 to LED of TSSOP package to LEDs Jumper in 3&4 connects GPIO1 to LED...
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Page 10: Technical Support
If there are any questions, please send an e-mail to uarttechsupport@exar.com. 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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