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IM2000S датащи(PDF) 14 Page - List of Unclassifed Manufacturers

номер детали IM2000S
подробное описание детали  HIGH PERFORMANCE MICROSTEPPING STEP MOTOR CONTROLLER
PDF  16 Pages
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производитель  ETC [List of Unclassifed Manufacturers]
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IM2000S датащи(HTML) 14 Page - List of Unclassifed Manufacturers

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14
Figure 3.10: External Lookup Table
IM2000S
AD0-AD7
AD0-AD7
To Sine
D/A Converter
To Cosine
D/A Converter
Decimal
Lookup
Table
Sine
Decimal
Lookup
Table
Cosine
In reconstructing the sine and cosine
waveforms, the IM2000S addresses
locations 0 - 249 to reconstruct the first
quarter of the waveform. The 250th
location represents the peak or start of
the second quarter. Table 3.4 shows the
addresses generated by the IM2000S for a
resolution of 5 microstep per step
selected by MSEL0 - MSEL3.
Figure 3.10 shows a block diagram
utilizing external lookup tables.
Buss/Stand-alone Mode
The IM2000S may be used either in stand-alone mode or tied
directly to the data buss of a microprocessor/controller.
If the Mode input is HIGH, the IM2000S will be in stand-
alone mode and MSEL0 - MSEL3 and DIR will be updated on
the rising edge of the SCLK input. The EN input is not
dependent on the SCLK input.
If the Mode input is LOW, the IM2000S will be in Buss Mode
and MSEL0 - MSEL3, DIR and EN are latched into the
IM2000S on the rising edge of the WR input. Figure 3.11
shows the timing diagram for the WR input.
Figure 3.11: WR Input Timing
t
wh
t
wr
MODE
MSEL0 - MSEL3
DIR, EN
WR



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