Maximum and Minimum Status Registers

The XADC also tracks the minimum and maximum values recorded for the internal sensors since the last power-up or since the last reset of the XADC control logic. The maximum and minimum values recorded are stored in the DRP status registers starting at address 20h (see Status Registers, page 30 ). On power-up or after reset, all minimum registers are set to FFFFh and all maximum registers are set to 0000h . Each new measurement generated for an on-chip sensor is compared to the contents of its maximum and minimum registers. If the measured value is greater than the contents of its maximum registers, the measured value is written to the maximum register. Similarly, for the minimum register, if the measured value is less than the contents of its minimum register, the measured value is written to the minimum register. This check is carried out every time a measurement result is written to the status registers.

Table 4-7: Maximum and Minimum Registers
Status Register	Description
20h	Temp max – Maximum temperature recorded
21h	V _CCINT max – Maximum V _CCINT recorded
22h	V _CCAUX max – Maximum V _CCAUX recorded
23h	V _CCBRAM max – Maximum V _CCBRAM recorded
24h	Temp min – Minimum temperature recorded
25h	V _CCINT min – Minimum V _CCINT recorded
26h	V _CCAUX min – Minimum V _CCAUX recorded
27h	V _CCBRAM min – Minimum V _CCBRAM recorded
28h	V _CCPINT ⁽¹⁾ max – Maximum V _CCPINT recorded
29h	V _CCPAUX ⁽¹⁾ max – Maximum V _CCPAUX recorded
2Ah	V _{CCO_DDR} ⁽¹⁾ max – Maximum V _{CCO_DDR} recorded
2Bh	Unassigned
2Ch	V _CCPINT ⁽¹⁾ min – Minimum V _CCPINT recorded
2Dh	V _CCPAUX ⁽¹⁾ min – Minimum V _CCPAUX recorded
2Eh	V _{CCO_DDR} ⁽¹⁾ min – Minimum V _{CCO_DDR} recorded
2Fh	Unassigned
Notes: 1. Only available on the Zynq-7000 SoC devices.