5 miscellaneous menu, 1 extended temperature range, 2 temperature alert output – Kontron KTT20-pITX User Manual
Page 10: 4 temperature high limit
KTD-S0045-D
Page 6
U-Boot Setup
KTT20/pITX Software Guide
2.4.3 GPIO
Interface
You can choose between three modes: all interface signals are defined as GPIOs (General Purpose Input
Output) or some special signals have another function (I
2
C
TM
, SPI
TM
respectively SDIO). For a detailed
overview about these signals see the 'KTT20/pITX Users Guide' chapter 'Digital I/O Interface'. The signals
are named GPIO16 to GPIO21 respectively GPIO23 to GPIO29, GPIO32 and GPIO36 to GPIO37.
Remark: the operating systems do not support most of these special functions because the possible appli-
cations can be too different. Following the possible options
S
gpio
S
i2c-spi
S
sdio
2.5
Miscellaneous Menu
This menu part defines several special features (currently only temperature sensor features)
S
Extended temperature range
S
Temperature alert output
S
Temperature high limit
S
Temperature low limit
2.5.1
Extended Temperature Range
The default temperature range of the sensor is 0
0
C to +127
0
C. If you activate the extended range you can
measure a temperature between -55
0
C and +150
0
C. There are two options
S
disabled
S
enabled
2.5.2
Temperature Alert Output
In some cases it can be useful to disable the alert output. With this submenu is it possible to set this alarm
signal to
S
disabled
S
enabled
2.5.4 Temperature
High
Limit
The temperature high limit controls the alert output. Dependent on the extended temperature setting the
limit can be up to +150
0
C. The input format is represented by a decimal number with maximal three digits.
Example:
Temp high limit: 75