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User's Manual l TQMa6x & TQMa6xP UM 0403 l © 2019, TQ-Systems GmbH
Page 14
3.2.2.4
EEPROM
A serial EEPROM is available for permanent storage of e.g. TQMa6x characteristics or customers parameters.
Depending on the TQMa6x version, the I2C1 or the I2C3 bus of the i.MX6 controls the EEPROM, see also 3.2.5.9.
Write-Protection (WP) is not supported.
The following block diagram shows how the EEPROM is connected to the i.MX6.
i.MX6
EEPROM
I2C[1/3]_SCL
I2C[1/3]_SDA
SCL
SDA
Illustration 6:
Block diagram EEPROM interface
The following table shows the EEPROM used.
Table 14:
EEPROM, component
Manufacturer
Part number
Size
Temperature range
STM
M24C64-WDW6TP
64 kbit
–45 °C to +85 °C
The I
2
C address of the EEPROM is
In the EEPROM, TQMa6x-specific data is stored. It is, however, not essential for the correct operation of the TQMa6x.
The user can delete or alter the data.
In the following table, the parameters stored in the EEPROM are shown.
Table 15:
EEPROM, TQMa6x-specific data
Offset Payload (byte)
Padding (byte)
Size (byte)
Type
Remark
0x00
Variable
Variable
32
(10)
Binary
Hard Reset Configuration Word (HRCW), (optional)
0x20
6
(10)
10
(10)
16
(10)
Binary
MAC address
0x30
8
(10)
8
(10)
16
(10)
ASCII
Serial number
0x40
Variable
Variable
64
(10)
ASCII
Order code
0x80
–
–
8064
(10)
–
(Unused)