AD4884BBCZ datasheet(81/116 Pages) AD

tên linh kiện	AD4884BBCZ

Giải thích chi tiết về linh kiện	Dual-Channel 16-Bit, 20MSPS, SAR ADC with Analog Front End

PDF	116 Pages

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81 / 116 page

Data Sheet

AD4884

DIGITAL FEATURES

analog.com

Rev. 0 | 81 of 116

Event Triggered Capture, Read Latest

WATERMARK

Event triggered (read latest) mode is used where there is interest

only in the ADC data after an event occurs. This event can be an

internally generated event, where the AD4884 channel is running

continuously, and the threshold detection is enabled to trigger an

event as soon as an ADC input threshold is crossed. Or, the user

can be independently monitoring the system or ADC input for an

event, and an external event trigger is user-issued via a configured

GPIO. As in all cases of arming the FIFO, the first rising edge after

a FIFO_MODE write command arms the FIFO for data capture,

however, no data is written to the FIFO until an event of the

selected method occurs.

Rearming the trigger involves a similar process to the immediate

mode rearming. The FIFO is firstly disabled by writing 00 to the

FIFO_MODE bits before, and then rearmed by again enabling the

required capture mode.

Figure 128. Event Triggered Capture, Read Latest WATERMARK Arming

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