IC-MN Datasheet, PDF (34/59 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 D1, Page 34/59
iC-MN functions as a simultaneous sampling, 3-
channel sine-to-digital converter when the multiturn
modes are selected with deactivated synchronization.
When SBL_S = 0 and SBL_N = 0 no track synchro-
nization 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
conversion of the set tracks
2. Transmission of the output data
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
MODE_ST Code 0x0D
The processing time is low as ”old” data is transmitted,
the time of sampling is, however, known (NB: 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
background conversion
2. With a data readout: transmission of current
data.
MODE_ST Code 0x0F
This mode can be used especially for resolver sys-
tems, in which 1 to 3 channels need to be sampled in
synchronism with a specific carrier frequency. An ex-
ternal trigger signal supplied to pin T3 takes over the
sampling control and thus decouples it from the data
readout timing. The conversion procedure is as fol-
lows:
1. A conversion is triggered by pin T3
2. With a data readout the most recent output data
triggered by pin T3 is transmitted.