TQ TQMa65 Series, User Manual

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Preliminary User's Manual l TQMa65xx UM 0001 l © 2021, TQ-Systems GmbH Page 18
3.2.2.5 EEPROM with temperature sensor
A serial EEPROM including temperature sensor NXP SE97BTP, controlled by the WKUP_I2C bus, is assembled on the TQMa65xx.
The lower 128 bytes (addresses 00h to 7Fh) can be set to Permanent Write Protected (PWP) mode or Reversible Write Protected
(RWP) mode by software. The upper 128 bytes (addresses 80h to FFh) cannot be write-protected and can be used for general
data storage. The EEPROM also provides a temperature sensor to monitor the temperature of the TQMa65xx.
Figure 6: Block diagram temperature sensor interface

The device has the following I 2 C addresses:
o
EEPROM (Normal Mode):
0x57 / 101 0111b
o EEPROM (Protected Mode): 0x37 / 011 0111b
o
Temperature sensor:
0x1F / 001 1111b
The EEPROM with temperature sensor (D4) is assembled next to the AM65xx on the top side of the TQMa65xx, see Figure 14.
Table 16: Temperature sensor SE97BTP
Manufacturer Device Resolution Accuracy Temperature range
NXP SE97BTP 11 bits
Max. ±1 °C
Max. ±2 °C
Max. ±3 °C
+75 °C to +95 °C
+40 °C to +125 °C
–40 °C to +125 °C