5
REV. 1.0.0
XR20M1280 EVALUATION BOARD USER’S MANUAL
J50
SLEEP/PWRDN pin
Header installed, no jumpers installed (default)
Refer to the datasheet for the behavior of this pin
J51
UART Reset input
Jumper on 1&2 selects J2 as hardware reset
Jumper on 2&3 selects external reset from J9 pin 32 (default)
J10
I
2
C Address Select (A0)
■
1&2 = VCC
■
3&4 = SCL
■
5&6 = SDA
■
7&8 = GND
For I
2
C mode, only one jumper should be selected. See
XR20M1280 datasheet for I
2
C addressing.
For SPI mode, jumper should be out.
J11
I
2
C Address Select (A1)
■
1&2 = VCC
■
3&4 = SCL
■
5&6 = SDA
■
7&8 = GND
For I
2
C mode, only one jumper should be selected. See
XR20M1280 datasheet for I
2
C addressing.
For SPI mode, jumper should be out.
J9
Header for connection to external micro-
controller board
■
Pin 23 = SDA signal for I
2
C
interface
■
Pin 11 = SO signal for SPI
interface
■
Pin 19 = IRQ# output signal from
XR20M1170
■
Pin 15 = A0 signal for I
2
C interface
or CS# for SPI interface
■
Pin 13 = A1 signal for I
2
C interface
or SI for SPI interface
■
Pin 32 = RESET# input signal
■
Pin 9 = SCK for SPI interface
(Jumper on J8 1&2)
■
Pin 29 = SCL signal for I
2
C
interface or (Jumper on J9 2&3)
■
Pin 5, 6, 7, 8, 31, 35 = GND signal
■
Pin 34 & 36 = Ex5V power
Ground and Power connections
■
Pin 5, 6, 7, 8, 31 or 35 should be connected to GND
■
Pin 34 or 36 should be con5V
If I
2
C interface is used (defaults for XR20M1280IL32-0A-EB):
■
Pin 23 should be connected to SDA
■
Pin 19 should be connected to MCU interrupt input (if using
interrupts)
■
Pin 15 should be unconnected when using J10
■
Pin 13 should be unconnected when using J11
■
Pin 32 should be connected to the active low reset output
from the MCU
■
Pin 29 should be connected to SCL
If SPI interface is used (defaults for XR20M1280IL32-0B-EB):
■
Pin 23 should be unconnected
■
Pin 11 should be connected to SO
■
Pin 19 should be connected to MCU interrupt (if using
interrupts)
■
Pin 15 should be connected to CS#
■
Pin 13 should be connected to SI
■
Pin 32 should be connected to the active low reset output
from the MCU
■
Pin 9 should be connected to SCK
J39
Routing for GPIO9-13
Not used for XR20M1280IL32
J40
Routing for GPIO8-4
Trace between 1&2
Trace between 3&4
Trace between 5&6
Trace between 7&8
No trace between 9&10 (not used for XR20M1280IL32)
T
ABLE
4: J
UMPER
S
ETTINGS
F
OR
XR20M1280IL32
J
UMPERS
F
UNCTIONS
C
OMMENTS
