IC-LNG_14 Datasheet, PDF (25/30 Pages) IC-Haus GmbH – 16-BIT OPTO ENCODER

iC-LNG 16-BIT OPTO ENCODER ^preliminary
WITH SPI AND SERIAL / PARALLEL OUTPUTS
SHIFT REGISTER OUTPUT
Rev B1, Page 25/30
In interface mode (EPG = 0) iC-LNG provides a shift ^STA
register for the readout of position data. In order to ⁰
be able to use this shift register the SPI interface sen- ¹
sor data channel must be deactivated by command
ACTIVATE with PACTIVE = 0 (Table 12).
Add. 0x08, bit 3
1024 SIN/COS cycles
512 SIN/COS cycles
Table 24: SIN/COS resolution
After a power-on the shift register in iC-LNG is active. SRC
The position data is output in Gray code with the MSB Code
first. This MSB is output in real time at the shift reg-
ister output (pin DOUT) when NSL = 1. When NSL = ^0x0
0 the position data is stored in the shift register and ^0x1
can then be output serially with rising edge CLK. The ^0x2
position data readout process is shown in Figure 17.
0x3
0x4
External data can be read into iC-LNG through shift ^0x5
register input pin DIN. This is output after the position ^0x6
data. For example, iC-LNG’s pin ERR can be con- ^0x7
nected to pin DIN to link the alarm output to the po-
sition data.
Add. 0x08, bit 2:0
Shift register Data bits for
length
STA = 0
16 bits
16
16 bits
16
16 bits
15
16 bits
14
16 bits
13
16 bits
12
14 bits
13
14 bits
12
Data bits for
STA = 1
15
15
14
13
12
11
12
11
Table 25: Shift register length
The length of the shift register and the number of data
bits used can be selected using parameter SRC, de-
pending on the set SIN/COS resolution.
The MSB of the position data can be inverted by pa-
rameter DIR (code inversion).
DIR
Add. 0x07, bit 5
0
No code inversion
1
Code inversion
Table 26: Code inversion
NSL
CLK
DOUT
MSB MSB-1 MSB-2
LSB
DIN
Figure 17: Shift register output (EPG = 0)