IC-MN_16 Datasheet, PDF (34/62 Pages) IC-Haus GmbH – 25-BIT NONIUS ENCODER WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION

iC-MN 25-BIT NONIUS ENCODER
WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION
S/D CONVERSION with DIRECT OUTPUT
Rev F2, Page 34/62
iC-MN functions as a simultaneous sampling, 3-chan-
nel sine-to-digital converter when the multiturn modes
are selected with deactivated synchronization. When
SBL_S = 0 and SBL_N = 0 no track synchronization
takes place; the data from all three tracks is queued up
for output without any further processing.
Op. Mode Descriptions Of Direct Output Modes
MODE_ST Code 0x0C
The processing time is largely determined by the sum
of the conversion time of the configured tracks. The
conversion procedure is as follows:
1. A data readout request triggers the complete con-
version of the set tracks
2. Transmission of the output data
MODE_ST Code 0x0D
The processing time is low as ”old” data is transmitted,
the time of sampling is, however, known
Figure 13: Principle of simultaneous sampling,
3-channel S/D conversion with direct data
output
MODE_ST
Addr. 0x3D; bit 7:4
Direct output via MT modes with deactivated
synchronization
Code
Description
Data output following S/D conversion of all tracks;
0x0C
synchronization disabled (SBL_x = 0)
Data output: result of previously triggered S/D
conversion;
0x0D
synchronization disabled (SBL_x = 0)
Data output: last result of background S/D
conversion (asynchronous);
0x0E
synchronization disabled (SBL_x = 0)
Data output: last result of S/D conversion triggered
by pin T3;
0x0F
synchronization disabled (SBL_x = 0)
Notes
On changing parameter MODE_ST during operation
command SOFT_RES should be issued.
Table 48: MT modes used for direct output
Note:
The data from the first readout is invalid following a
SOFT_RES).
The conversion procedure is as follows:
1. With a data readout: immediate transmission of
the data from the last readout cycle
2. With a data readout: start of a new conversion
and providing of data for the next readout cycle.
MODE_ST Code 0x0E
The processing time is low and the time of sampling
not precisely known. The conversion procedure is as
follows:
1. Regardless of the data readout: permanent back-
ground conversion
2. With a data readout: transmission of current data.
MODE_ST Code 0x0F
This mode can be used especially for resolver systems,
in which 1 to 3 channels need to be sampled in syn-
chronism with a specific carrier frequency. An external
trigger signal (rising edge) supplied to pin T3 takes over
the sampling control and thus decouples it from the
data readout timing. The conversion procedure is as
follows:
1. A conversion is triggered by a rising edge at pin
T3
2. With a data readout the most recent output data
triggered by pin T3 is transmitted.