Preliminary User's Manual l TQMa65xx UM 0001 l © 2021, TQ-Systems GmbH
Page 20
3.2.5
I
2
C devices
WKUP_I2C is used for the I
2
C devices on the TQMa65xx. The bus has 4.7 kΩ Pull-Ups on the TQMa65xx.
The following I
2
C devices are connected to the WKUP_I2C bus on the TQMa65xx:
Figure 9:
Block diagram I
2
C devices
Table 17:
TQMa65xx WKUP_I2C addresses
Device
Function
Hex / 7-bit address
Remark
SE97BTP
Temperature sensor
0x1F / 001 1111b
Access to temperature registers
EEPROM
0x57 / 101 0111b
R/W access in Normal Mode
EEPROM
0x37 / 011 0111b
R/W access in Protected Mode
MKL04Z16
Board Controller
0x11 / 001 0001b
Should not be altered
SE050
Secure Element
0x48 / 100 1000b
Assembly option
M24LC64
EEPROM
0x50 / 101 0000b
For general usage
PCF85063A
RTC
0x51 / 101 0001b
Assembly option
TPS62363Y
Buck regulator
0x60 / 110 0000b
Should not be altered
If more I
2
C devices are connected to the WKUP_I2C bus on the carrier board, the maximum capacitive bus load according to the
I
2
C standard must be observed. If necessary, additional Pull-Ups have to be provided on the carrier board.
3.2.6
Board Controller
The following housekeeping functions are handled by the Board Controller on the TQMa65xx:
•
Voltage supervision
•
Power-Up sequencing
•
Power modes control
•
Temperature monitoring
•
Reset control
3.2.7
Reset
POR_MB# holds the TQMa65xx in reset. If POR_MB# is released, the Board Controller starts the initialization.
If no errors occur during power supply start-up and the initialization, the AM65xx is started.
The TQMa65xx reset signal is provided at the connector via POR#_OUT (X1-A27).
Additionally a red LED signals the reset condition. Further reset sources are:
•
Requested by software via Board Controller
•
Reset by nSRST_JTAG# signal
•
Power Supply Error
Reset inputs and outputs are available at the TQMa65xx connectors.