The correct appearance of this website is only visible in graphical browsers that support web standards. We try to ensure our content is accessible to any browser but we recommend you upgrade your web browser if you can.

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)

P	expanded time-base period (in PIC cycles).
TB	8 bit time-base expansion (R13 -> 1 to 256, 0 read as 256).

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 * PRETD

T[PRE]	pre trigger delay (in PIC cycles).
PRETD	8 pre trigger delay value (R20 -> 0 to 255).
P	expanded time-base period (in PIC cycles).

The post trigger delay is calculated as:

T[PTD] = P * N + U

N = PTD + PTD[hi] + 2

T[PTD]	post trigger delay (in PIC cycles).
N	number of expanded capture periods.
P	expanded time-base period (in PIC cycles).
PTD	16 bit post trigger delay value (R11, R12 -> 0 to 65536).
PTD[hi]	8 bit high byte of post trigger delay (R11 -> 0 to 255).
U	trigger uncertainty = ± 2 PIC cycles

This trace mode supports the use of analog edge trigger logic.