System Controller; Qoriq Ls1028A Reference Design Board Reference Manual, Rev. A, 02/2018 - NXP Semiconductors QorIQ LS1028A Reference Manual

Table 2-18. Thermal monitor configuration (continued)
I2C write
0x4C 0xOD <TLIMITH>
0x4C 0x0E <TLIMITL>
The SW_BYPASS_B switch (SW3[3]) disables thermal
monitoring. This may be necessary if operating the board
without a processor installed, as an open thermal diode
connection measures as 127 °C.

2.20 System controller

The LS1028ARDB system controller (or "CPLD" for short) controls the operation of the
system, including:
• Reset assertion to processor and devices
• Processor and system configuration
• Interrupt management
• System alert monitoring and status display
• Remapping of system boot devices
• Handling of board control and status registers
The following figures show the system controller architectural details.

QorIQ LS1028A Reference Design Board Reference Manual, Rev. A, 02/2018

NXP Semiconductors
Chapter 2 LS1028ARDB Functional Description
Program the high set point of SA56004ED remote measurement (the
processor). <TLIMITH> can be any user defined value in 2's
complement form. For example, for +85°C, TLIMITH should be 0x55.
Program the low set point of SA56004ED remote measurement (the
processor). <TLIMITL> can be any user defined value in 2's
complement form. For example, -25°C can be programmed as 0xE7.
NOTE
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