IC-PV Datasheet, PDF (15/28 Pages) IC-Haus GmbH – BATTERY-BUFFERED HALL MULTITURN ENCODER

iC-PV
BATTERY-BUFFERED HALL MULTITURN ENCODER
Rev E2, Page 15/28
The singleturn bit width, iC-PV expects in chain mode
at pin DI, can be configured in similar way with configu-
ration parameter ST_BW (Table 14).
ST_BW
Code
0x00
0x01
...
0x0F
Addr. 0x02; bit 5:2
Bit width
3 bit
4 bit
...
18 bit
Table 14: Singleturn input bit width
After the transmission of the absolute position and the
synchronization information, iC-PV’s serial protocol al-
lows the optional transmission of an error bit and a
parity bit. The error bit signalizes errors occurred dur-
ing startup phase, wrong CRC checksums, low battery
or exceeded maximum rotary speed. Its polarity is con-
figured with parameter EN_ERR shown in Table 15.
The optional parity bit finishes the transmission. Its
polarity is either even or odd according to parameter
EN_PAR (Table 16).
EN_ERR
Code
00
01
10
11
Addr. 0x00; bit 5:4
Mode
Communication without error bit
Calibration mode and iC-Haus internal use only
Communication with additional error bit
(negative polarity)
Communication with additional error bit
(positive polarity)
Table 15: Enable error bit transmission
EN_PAR
Code
00
01
10
11
Addr. 0x00; bit 7:6
Mode
Communication without parity bit
iC-Haus internal use only
Communication with additional parity bit
(even polarity)
Communication with additional parity bit
(odd polarity)
Table 16: Enable parity bit transmission
The line signals for both interface modes are shown in
Figure 8 and 9. Optional bits are drawn in light gray.
The number of transmitted multiturn and singleturn bits
depends on parameter MT_BW and ST_BW.
CLK
DO
t
t
req
period
REQ
MT MSB MSB-1 MSB-2
MT LSB Sync 2 Sync 1 Sync 0 ERROR PARITY
tt
t
t
out
hi lo
phase
t
cycle
Figure 8: I/O line signals of the serial interface in SSI mode (INT_MODE = 0).
NSEL
to iC-LNB/LNG only
DI
CLK
tt
ic ci
ST MSB
MSB-1
t
period
ST LSB DIN
DIN
DO
MT MSB
t
phase
MSB-1
MSB-2
Sample ST MSB
for synchronisation
(first CLK rising edge)
MT LSB ST MSB
ST LSB DIN
DIN
t
cycle
t
out
Figure 9: I/O line signals of the serial interface in chain mode (INT_MODE = 1). Usage with iC-LNG/LNB
optical singleturn encoder only.