Datasheet

613

32133D–11/2011

UC3D

28.6.16 Window monitor

The window monitor monitors ADC results and make the ADCIFD behave as an analog compar-

ator. Configuration is done by writing appropriately the Window Configuration Register (WCFG)

and the Window Thresholds Register (WTH). When writing a one in the Monitor Filter Mode bit in

the WCFG register (WCFG.MFM) , conversions are filtered using its index in the sequence. Oth-

erwise, no filtering is applied, monitoring is performed on every conversion. Index is given by

writing the field Source in the WCFG register (WCFG.SRC). Supported modes are selected by

writing the Window Mode field in the WCFG register, please refer to the Table 28-2 below.

Thresholds are given by writing the Low Threshold (LT) and High Threshold (HT) in WTH.

Please note that the significant WTH.LT and WT.HT bits are given by the precision selected in

the SEQCFG.SRES field. That means that if you are in 8-bit mode, only the 8 lower bits will be

considered.

Note: Comparisons are performed regardless with the SEQCFG.HWLA setting (half word left

adjust).

28.6.17 Interrupts

Interrupt requests are enabled by writing a one to the corresponding bit in the Interrupt Enable

interrupt requests, but potentially masked, are visible in the Status Register (SR). To clear an

active interrupt request, write a one to the corresponding bit in the Clear Register (CR).

The Status Register (SR) fields in common with IER/IDR/IMR show the status since the last

write to the Interrupt Clear Register. Other SR fields show the status at the time being read.

Table 28-2. Window Monitor Modes

WM field in WCFGy

Modes

0 0 0 No window mode (default)

0 0 1 Mode 1 : active when result > LT

0 1 0 Mode 2 : active when result < HT

0 1 1 Mode 3 : active when LT < result < HT

1 0 0 Mode 4 : active when (!(LT < result < HT))

1 0 1 reserved

1 1 0 reserved

1 1 1 reserved