|BITSCOPE||design||manual||modes||detail||TM2 - Single Channel Expanded|
This trace mode is similar to TM0: it captures data from the primary channel only.
The difference is that the capture sample period is expanded. This time-base expansion operates by enabling data capture for one PIC cycle every P PIC cycles where P is the expanded time-base sample period computed from the Time-base Expansion Register R13 according to:
P = 14 + 3 * (TB + 1)where:
The minimum time-base expansion period is 8.0 uS and the maximum 314 uS. This provides expanded time-base sample rates ranging from 3.184 kHz to 125 kHz. At all expanded time-base rates, 10 samples are acquired in a single burst at 25 MHz at each expanded period.
The pre trigger delay is calculated as:
T[PRE] = P * PRETDwhere:
The post trigger delay is calculated as:
T[PTD] = P * N + Uwhere:
This trace mode supports the use of analog edge trigger logic.