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User's Manual l MBa8Xx UM 0100 l © 2020, TQ-Systems GmbH
Page 16
3.5
Temperature sensor and EEPROM
A temperature sensor SE97BTP is populated on the MBa8Xx to monitor the temperature. The same type of sensor is also used on
the TQMa8Xx. Both sensors are read out via I2C1, see Table 10.
The sensor address on the MBa8Xx can be changed by reassembling resistors. When changing the address, care must be taken to
avoid address conflicts with existing I
2
C devices, see Table 10. The assembly options are documented in the MBa8Xx schematics.
The SE97BTP has an additional EEPROM. Further specifications of the SE97BTP can be found in the data sheet.
The alarm output EVENT# of the SE97BTP is not connected and is not available on the MBa8Xx.
TQMa8Xx
I2C1
SE97BTP
I2C
Level-
Shifter
Figure 5:
Block diagram temperature sensor
The I²C addresses of the temperature sensor and the EEPROM are determined by the input level of pins A0, A1 and A2, among
other things. The I²C addresses can be changed according to the following table by a resistor reassembly.
Details can be taken from the MBa8Xx schematics.
Table 14:
Assembly option I²C address temperature sensor / EEPROM
7-bit address
R43
R42
R44
R45
R46
R47
Remark
Temperature
sensor
EEPROM
(read/write)
EEPROM
(Software
protection)
0x18
0x50
0x30
NP
10 kΩ
NP
10 kΩ
NP
10 kΩ –
0x19
0x51
0x31
10 kΩ
NP
NP
10 kΩ
NP
10 kΩ –
0x1A
0x52
0x32
NP
10 kΩ
10 kΩ
NP
NP
10 kΩ –
0x1B
0x53
0x33
10 kΩ
NP
10 kΩ
NP
NP
10 kΩ –
0x1C
0x54
0x34
NP
10 kΩ
NP
10 kΩ
10 kΩ
NP
Default
0x1D
0x55
0x35
10 kΩ
NP
NP
10 kΩ
10 kΩ
NP
–
0x1E
0x56
0x36
NP
10 kΩ
10 kΩ
NP
10 kΩ
NP
–
0x1F
0x57
0x37
10 kΩ
NP
10 kΩ
NP
10 kΩ
NP
–