14
UNI-DS6
MikroElektronika
page
10. DS1820 temperature sensor
DS1820 is a temperature sensor that uses 1-wire communication for its operation� It is used to measure temperature in
a range between -55 and 125°C and provides ±0�5°C accuracy for temperatures in a range between -10 and 85°C� The
power supply voltage of 3�3V to 5V is used for the operation of this sensor� It takes maximum 750ms for the DS1820 to
convert temperature with 9-bit resolution� There is a socket for this temperature sensor provided on the development
system� Communication between this module and the microcontroller is enabled via the microcontroller pins RC1 and
RA4� To use pin RC1 place jumper J15 in the RC1 position and for the RA4 pin place jumper J15 in the RA4 position�
1-wire® serial communication enables data to be transferred over one single communication line, while the process
itself is under control of the
master
microcontroller� The advantage of this communication is that only one microcontroller
pin is used� All slave devices have a unique ID code, which enables the master device to easily identify all devices
sharing the same communication bus�
VCC-BRD
DS1820
DQ
DS1820-DQ
R13
1K
-55 C
125 C
Botoom view
VCC-MCU
DQ
GND
DS
1820
VCC-MCU
DQ
GND
RC1
RA4
J15
RA4
RE4
RE2
RA12
RB4
RF12
RB12
RG4
RC4
RG12
RC12
RH4
RD4
RJ4
RD12
USB-VBUS
RA6
RA14
RF6
RB6
RF14
RB14
RG6
RC6
RG14
RC14
RH6
RD6
RJ6
RD14
#RX232A
#TX232A
#SCL
#SDA
#SS1#
#SCK1
#MISO1
#MOSI1
USB-DP
RA0
RE0
RA8
RF0
RE6
RB0
RF8
RB8
RG0
RC0
RG8
RC8
RH0
RD0
RJ0
RD8
RA2
RA10
RF2
RF4
RB2
RF10
RB10
RG2
RC2
RG10
RC10
RH2
RD2
RJ2
RD10
RA5
RA13
RB5
RF13
RB13
RG5
RC5
RG13
RC13
RH5
RD5
RJ5
RD13
RA7
RA15
RF7
RF5
RF3
RB7
RF15
RB15
RG7
RC7
RG15
RC15
RH7
RD7
RJ7
RD15
#RX232B
#TX232B
#CS1#
#CS2#
#SS2#
#SCK2
#MISO2
#MOSI2
USB-DN
RA1
RE1
RA9
RF1
RE7
RE5
RE3
RB1
RF9
RB9
RG1
RC1
RG9
RC9
RH1
RD1
RJ1
RD9
RA3
RA11
RB3
RF11
RB11
RG3
RC3
RG11
RC11
RH3
RD3
RJ3
RD11
VCC-SW
VCC-5V
CN20
CN21
Figure 10-4
: DS1820 and microcontroller connection schematic
Figure 10-1
: DS1820
connector (DS1820 is
not connected)
Figure 10-2
: Temperature
sensor DS1820 is
connected via pin RA4
Figure 10-3
: Temperature
sensor DS1820 is
connected via pin RC1
NOTE
:
Make sure that the
rounded side of the
DS1820 matches half-
circle on the board
