iC-LNG 16-BIT OPTO ENCODER
WITH SPI AND SERIAL / PARALLEL OUTPUTS
Rev A1, Page 20/25
OCN
Code
0x00
0x01
...
Add. 0x05, bit 6:0
Offset value
3Meg
GS
-
VPSI
+
-
NSIN
-
Vref
+
0.45 · VDDA
DPSIN
+
VDDA
GS
+
-
GR
0.4508 · VDDA
OSN
(0.45 + OCN·0.1 ) · VDDA
Vref
127
VREFNS
0x7F
0.55 · VDDA
VDDA
+
-
VREFPS
OSP
Table 21: NCOS offset
3Meg
GS
-
VNSI
+
-
+
-
PSIN
Vref
+
DNSIN
The signal path of the SIN/COS tracks is shown in Fig-
ure 15 with the conditioning unit.
GS
GR
Vref
3Meg
GC
GC
-
VPCO
+
-
NCOS
-
Vref
+
DPCOS
+
VDDA
+
-
GR
OCN
Vref
VREFNC
VREFPC
VDDA
+
-
OCP
3Meg
GC
-
VNCO
+
-
+
-
PCOS
Vref
+
DNCOS
GC
GR
Vref
Figure 15: SIN/COS signal path
SYNCHRONIZATION
NSYNC
Add. 0x07, bit 6
iC-LNG synchronizes the digital tracks to the interpo-
lator.
NSYNC can be used to deactivate synchronization to
check the adjustment or for code discs not in Gray
code. The comparated signals of the digital tracks are
then output.
0
1
Synchronization activated
Synchronization deactivated
Table 22: Synchronization
PARALLEL ENCODER MODE
EPG
Add. 0x07, bit 4
In parallel encoder mode an absolute position data
word with a width of 14 bits is output in parallel. This
position data word consists of the 11 bits of the digital
tracks and of 3 bits interpolated from the analog track.
The position data is output in Gray code. Parallel en-
coder mode is activated by parameter EPG (see also
Operating Modes on page 14).
0
1
Interface mode
Parallel encoder mode
Table 23: Selecting the operating mode
ICHAUS [ IC-HAUS GMBH ]
