Texas Instruments TMS320 2833 Series User Manual

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SPRUI07–March 2020
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Analog-to-Digital Converter (ADC)
7.4.3 ADCMAXCONV Register (Offset = 2h) [reset = 0h]
ADCMAXCONV is shown in Figure 7-17 and described in Table 7-12.
Figure 7-17. ADCMAXCONV Register
15 14 13 12 11 10 9 8
RESERVED
R-0h
7 6 5 4 3 2 1 0
RESERVED MAX_CONV2 MAX_CONV1
R-0h R/W-0h R/W-0h
Table 7-12. ADCMAXCONV Register Field Descriptions
Bit Field Type Reset Description
15-7 RESERVED R 0h Reads return a zero. Writes have no effect.
6-4 MAX_CONV2 R/W 0h MAX_CONV2 bit field defines the maximum number of conversions
executed in an autoconversion session for sequencer 2 (SEQ2)
3-0 MAX_CONV1 R/W 0h MAX_CONV1 bit field defines the maximum number of conversions
executed in an autoconversion session for sequencer 1 (SEQ1). The
bit fields and their operation vary according to the sequencer modes
(dual/cascaded).
For SEQ1 operation, bits MAX_CONV1[2:0] are used.
For SEQ operation, bits MAX_CONV1[3:0] are used.
An autoconversion session always starts with the initial state and
continues sequentially until the end state if allowed. The result buffer
is filled in a sequential order. Any number of conversions between 1
and (MAX_CONVn +1) can be programmed for a session.
ADCMAXCONV Register Bit Programming
If only five conversions are required, then MAX_CONVn is set to four.
Case 1: Dual mode SEQ1 and cascaded mode Sequencer goes from CONV00 to CONV04, and the five
conversion results are stored in the registers Result 00 to Result 04 of the Conversion Result Buffer.
Case 2: Dual mode SEQ2 Sequencer goes from CONV08 to CONV12, and the five conversion results are
stored in the registers Result 08 to Result 12 of the Conversion Result Buffer.
MAX_CONV1 Value >7 for Dual-Sequencer Mode
If a value for MAX_CONV1, which is greater than 7, is chosen for the dual-sequencer mode (i.e., two
separate 8-state sequencers), then SEQ_CNTR will continue counting past seven, causing the sequencer
to wrap around to CONV00 and continue counting.
Table 7-13. Bit Selections for MAX_CONV1 for Various
Number of Conversions
ADCMAXCONV[3-0] Number of Conversions
0000 1
0001 2
0010 3
0011 4
0100 5
0101 6
0110 7
0111 8
1000 9
1001 10
1010 11
1011 12

Texas Instruments TMS320 2833 Series Specifications

General

Brand	Texas Instruments
Model	TMS320 2833 Series
Category	Controller
Language	English