Datasheet

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MibADC
TMS470R1B1M
16/32-Bit RISC Flash Microcontroller
SPNS109A – SEPTEMBER 2005 – REVISED AUGUST 2006
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 TMS470R1x 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 TMS470R1x 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 9 .
Table 9. MibADC Event Hookup Configuration
SOURCE SELECT BITS FOR G1 OR EVENT
EVENT # SIGNAL PIN NAME
(G1SRC[1:0] OR EVSRC[1:0])
EVENT1 00 ADEVT
EVENT2 01 HET18
EVENT3 10 Reserved
EVENT4 11 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).
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