Table 4-8 Temperature Sensor Connections
Pin on EXT
connector
Pin name
AT30TSE758
temperature
sensor pin
Comment
11
SDA
1
Data line of serial interface
12
SCL
2
Clock line of serial interface
9
ALERT
3
Temperature alarm signalling pin
GND
GND
4
-
A2
5
Address line for serial interface, by default pulled
high
-
A1
6
Address line for serial interface, by default pulled
high
-
A0
7
Address line for serial interface, by default pulled
high
VCC
VCC
8
The temperature sensor has two TWI addresses; one for the temperature sensor and one for the
EEPROM. The addresses are "0b1001 A2 A1 A0" for the temperature sensor and "0b1010 A2 A1 A0" for
the EEPROM. The address selection lines (A2, A1, and A0) of the temperature sensor chip is by default
pulled high through 100kΩ resistors, which makes the default addresses 0b1001111 and 0b1010111.
Soldering the straps on the back of the I/O1 Xplained Pro board for
An
will alter that bit in the address to
zero. Each strap is marked in silkscreen with A0, A1, and A2 as shown in the picture below. When
communicating with the EEPROM parts of the TWI address is used as a page address. For more details,
see the device (AT30TSE752A/754A/758A)
Figure 4-1 Temperature Sensor TWI Address
4.3.4.
microSD Card Connector
I/O1 Xplained Pro features a microSD card connector that connects to cards via a SPI interface.
Examples on how to use microSD cards and an example SD card stack can be found through ASF, for
Atmel I/O1 Xplained Pro [USER GUIDE]
Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015
10
