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Exar XR20M1280 User Manual

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REV. 1.0.0
INTRODUCTION
This user's manual is for the XR20M1280 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 HARDWARE SETUP
1.1
Packages description
The evaluation board supports all 3 packages of the XR20M1280. 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
XR20M1280IL24-F
XR20M1280IL32-F
XR20M1280IL40-F
1.2
Jumper Settings
1.2.1
XR20M1280IL24
The following jumpers apply to the XR20M1280IL24:
J
F
UMPERS
J12
Selects the supply voltage for UART
modem I/Os including GPIO3-GPIO0
(VCC_UART)
J13
Selects the supply voltage for UART core
logic (VCC_CORE)
J14
Selects the supply voltage for CPU bus
interface (VCC_BUS)
T
1: P
ABLE
P
24-pin QFN
32-pin QFN
40-pin QFN
T
2: E
B
ABLE
VALUATION
OARD
P
N
ART
UMBER
XR20M1280L24-0A-EB
XR20M1280L24-0B-EB
XR20M1280L32-0A-EB
XR20M1280L32-0B-EB
XR20M1280L40-0A-EB
XR20M1280L40-0B-EB
T
3: J
S
ABLE
UMPER
ETTINGS
UNCTIONS
Jumper in 1&2 selects 3.3V (default)
Jumper in 3&4 selects 2.5V
Jumper in 5&6 selects 1.8V
Jumper in 1&2 selects 3.3V (default)
Jumper in 3&4 selects 2.5V
Jumper in 5&6 selects 1.8V
Jumper in 1&2 selects 3.3V (default)
Jumper in 3&4 selects 2.5V
Jumper in 5&6 selects 1.8V
XR20M1280 EVALUATION BOARD USER'S MANUAL
L
ACKAGE
IST
ACKAGE
O
P
N
RDERING
ART
UMBERS
D
M
C
EFAULT
ODE
ONFIGURATION
2
I
C
SPI
2
I
C
SPI
2
I
C
SPI
F
XR20M1280IL24
OR
C
OMMENTS
1
L
OCATION
U8
U9
U11

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Summary of Contents for Exar XR20M1280

  • Page 1 XR20M1280 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 INTRODUCTION This user’s manual is for the XR20M1280 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.
  • Page 2 XR20M1280 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 3: J XR20M1280IL24 ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Selects the supply voltage for GPIO15- Not used for XR20M1280IL24 GPIO4 (VCC_GPIO) Jumper in 1&2 selects 3.3V (default) Jumper in 3&4 selects 2.5V Jumper in 5&6 selects 1.8V Selects 5V source for regulator to 1.8V...
  • Page 3 XR20M1280 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 3: J XR20M1280IL24 ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS C Address Select (A1) For I C mode, only one jumper should be selected. See 1&2 = VCC XR20M1280 datasheet for I C addressing.
  • Page 4 XR20M1280 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 1.2.2 XR20M1280IL32 The following jumpers apply to the XR20M1280IL32: 4: J XR20M1280IL32 ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Selects the supply voltage for UART Jumper in 1&2 selects 3.3V (default) modem I/Os including GPIO3-GPIO0 Jumper in 3&4 selects 2.5V...
  • Page 5 XR20M1280 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 4: J XR20M1280IL32 ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS SLEEP/PWRDN pin Header installed, no jumpers installed (default) Refer to the datasheet for the behavior of this pin UART Reset input Jumper on 1&2 selects J2 as hardware reset Jumper on 2&3 selects external reset from J9 pin 32 (default)
  • Page 6 XR20M1280 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 1.2.3 XR20M1280IL40 The following jumpers apply to the XR20M1280IL40: 5: J XR20M1280IL40 ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Selects the supply voltage for UART Jumper in 1&2 selects 3.3V (default) modem I/Os including GPIO3-GPIO0 Jumper in 3&4 selects 2.5V...
  • Page 7 XR20M1280 EVALUATION BOARD USER’S MANUAL REV. 1.0.0 5: J XR20M1280IL40 ABLE UMPER ETTINGS UMPERS UNCTIONS OMMENTS Enable/Disable IR mode at power-up J44 in enables IR mode at power-up (can be enabled/disabled in software after J44 out disables IR mode at power-up...
  • Page 8 For a sample initialization routine or if there are any questions, 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.