Operating In Manual Mode - SG Micro SGM5200 Manual

SGM5200
DETAILED DESCRIPTION (continued)
Figure 6 illustrates the steps involved in operating in manual channel sequencing mode. Table 1 lists the mode control register
settings for manual mode. There are no program registers in manual mode.
nCS
Frame: n
Request for
Manual Mode
nCS
Frame: n+1
Entry into
Manual Mode
nCS
Frame: n+2
Operation in
Manual Mode
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nCS
Frame: n-1
*Sample: Samples and converts channel selected in 'frame (n-1)'.
*MUX: Selects channel incremented from previous frame as per auto sequence. This channel will be
acquired in this frame and sampled at start of 'frame (n+1)'.
*Range: As programmed in 'frame (n-1)'. Applies to channel selected for acquisition in current frame.
*SDI: Programming for 'frame (n+1)'.
DI[15:12] = 0001 (binary). Selects manual mode.
DI11 = 1 enables programming of 'range and GPIO'.
DI[10:7] = Binary address of the next channel.
DI6 as per required range for channel to be selected.
DI5 = 0. No power-down.
DI[4:0] as per GPIO settings.
*SDO: DO[15:0] address (or GPIO data) & conversion data of channel selected in 'frame (n-1)'.
*GPIO:
O/P: Latched on nCS falling edge as per DI[3:0] written in 'frame (n-1)'.
I/P: Input status latched on falling edge of nCS and transferred serially on SDO in the same frame.
*Sample: Samples and converts channel selected in 'frame n'.
*MUX: Selects channel programmed in 'frame n' (manual mode). This channel will be acquired in this
frame and sampled at start of 'frame (n+2)'.
*Range: As programmed in 'frame n'. Applies to channel selected for acquisition in current frame.
*SDI: Programming for 'frame (n+2)'.
DI[15:12] = 0001 (binary).To continue in manual mode.
DI11 = 1 enables programming of 'range and GPIO'.
DI[10:7] = Binary address of the next channel.
DI6 as per required range for channel to be selected.
DI5 = 0. No power-down.
DI[4:0] as per GPIO settings.
*SDO: DO[15:0] address (or GPIO data) & conversion data of channel selected in 'frame n'.
*GPIO:
O/P: Latched on nCS falling edge as per DI[3:0] written in 'frame n'.
I/P: Input status latched on falling edge of nCS and transferred serially on SDO in the same frame.
*Sample: Samples and converts channel selected in 'frame (n+1)'.
*MUX: Selects channel programmed in 'frame (n+1)' (manual mode). This channel will be acquired in
this frame and sampled at start of 'frame n+3'.
*Range: As programmed in 'frame (n+1)'. Applies to channel selected for acquisition in current frame.
*SDI: Programming for 'frame (n+3)'.
DI[15:12] = 0001 (binary). Selects manual mode.
DI11 = 1 enables programming of 'range and GPIO'.
DI[10:7] = Binary address of the next channel.
DI6 as per required range for channel to be selected.
DI5 = 0. No power-down.
DI[4:0] as per GPIO settings.
*SDO: DO[15:0] address (or GPIO data) & conversion data of channel selected in 'frame (n+1)'.
*GPIO:
O/P: Latched on nCS falling edge as per DI[3:0] written in 'frame (n+1)'.
I/P: Input status latched on falling edge of nCS and transferred serially on SDO in the same frame.
nCS
Figure 6. Entering and Running in Manual Channel Sequencing Mode
12-Bit, 1MSPS, 16 Channels,
Single-Ended, Serial Interface ADC
Device operation in auto-1 or auto-2 mode
Change to manual mode?
Yes
Continue operation in manual mode

Operating in Manual Mode

No
SEPTEMBER 2021
19