iC-MN 25-BIT NONIUS ENCODER
WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION
Rev D1, Page 41/59
CONFIGURATION OF DIGITAL DRIVER OUTPUTS
DSC
Code
00
Addr. 0x48; bit 1:0
The digital outputs SLO and NSLO can be used as ei-
ther a push-pull, lowside or highside driver. The mode
of operation is determined by DTRI. The driving capa-
bility is set via the short-circuit current parameter.
Short-circuit current
50 mA
01
20 mA
10
4 mA
11
1.2 mA
In order to meet RS422 specifications a short-circuit
current of 50 mA should be selected as well as to re-
duce the internal power dissipation. The driving ca-
pability can be reduced when external line drivers are
used.
Table 68: Driver short-circuit current
DSR
Addr. 0x48; bit 5:4
Code
Slew rate
Permissible
transmission frequency
In order to reduce crosstalk and to improve EMC the
slew rate can be selected to suit the line length. If
the edge steepness is reduced to 300 ns the maxi-
mum permissible transmission frequency is limited to
ca. 300 kHz if RS422 specifications are to be adhered
to.
00
01
10
11
10 ns
10 MHz max.
3 MHz max.
1 MHz max.
300 kHz max.
30 ns
100 ns
300 ns
Table 69: Driver slew-rate
DTRI
Code
00
Addr. 0x48; bit 3:2
Operating mode
Push-pull operation
01
Highside driver mode (P channel open drain)
Lowside driver mode (N channel open drain)
Not permitted
10
11
Table 67: Driver output mode
ICHAUS [ IC-HAUS GMBH ]
