SM470R1B1M-HT Datasheet, PDF (29/67 Pages) Texas Instruments – 16/32-BIT RISC FLASH MICROCONTROLLER

SM470R1B1M-HT
www.ti.com
SPNS155F – SEPTEMBER 2009 – REVISED AUGUST 2012
MibADC
The multi-buffered analog-to-digital converter (MibADC) accepts an analog signal and converts the signal to a
10-bit digital value.
The B1M MibADC module can function in two modes: compatibility mode, where its programmer's model is
compatible with the SM470R1x ADC module and its digital results are stored in digital result registers; or in
buffered mode, where the digital result registers are replaced with three FIFO buffers, one for each conversion
group [event, group1 (G1), and group2 (G2)]. In buffered mode, the MibADC buffers can be serviced by
interrupts or by the DMA.
MibADC event trigger enhancements
The MibADC includes two major enhancements over the event-triggering capability of the SM470R1x ADC.
• Both group 1 and the event group can be configured for event-triggered operation, providing up to two event-
triggered groups.
• The trigger source and polarity can be selected individually for both group1 and the event group from the
options identified in Table 11.
EVENT #
EVENT1
EVENT2
EVENT3
EVENT4
Table 11. MibADC Event Hookup Configuration
SOURCE SELECT BITS FOR G1 OR EVENT
(G1SRC[1:0] OR EVSRC[1:0])
00
01
10
11
SIGNAL PIN NAME
ADEVT
HET18
Reserved
Reserved
For group1, these event-triggered selections are configured via the group 1 source select bits (G1SRC[1:0]) in
the AD event source register (ADEVTSRC[5:4]). For the event group, these event-triggered selections are
configured via the event group source select bits (EVSRC[1:0]) in the AD event source register
(ADEVTSRC[1:0]).
For more detailed functional information on the MibADC, see the TMS470R1x Multi-Buffered Analog-to-Digital
Converter (MibADC) Reference Guide (literature number SPNU206).
Copyright © 2009–2012, Texas Instruments Incorporated
Submit Documentation Feedback
29