IC-LNB_13 Datasheet, PDF (19/35 Pages) IC-Haus GmbH – 18-BIT OPTO ENCODER WITH SPI AND SER/PAR INTERFACES

iC-LNB 18-BIT OPTO ENCODER ^preliminary
WITH SPI AND SER/PAR INTERFACES
OPERATING MODES
Rev A1, Page 19/35
Device iC-LNB has two operating modes which are se-
lected using register bit EPG.
EPG
Code
0
1
Addr. 0x07; bit 4
Description
Interface mode
Parallel mode
Table 8: Operating mode
In interface mode a shift register is provided for sen-
sor data readout, with an incremental interface includ-
ing an index signal (FlexCount active) for the output
of encoder quadrature signals with a configurable res-
olution. A power-on signal at pin POK indicates that
the system is enabled. Regardless of the FlexCount
resolution digital signals in Gray code are available at
outputs GA and GB. These can be used for example to
count the number of revolutions. A mechanical tilt an-
gle of the scanner can be adjusted using output signal
XJD.
In parallel encoder mode the sensor data is output as
a 16-bit, parallel data word in Gray code. For this pur-
pose all the relevant pins are reconfigured as outputs.
Table 9 shows the pin functions for the respective op-
erating mode (also see the parallel encoder mode sec-
tion on page 31).
The SPI interface for device configuration can also be
used for position data readout and is available in both
operating modes.
PAD FUNCTIONS
Pad
GND
VDD
SCK
MOSI
MISO
CS
TNC
TNS
DIR
NSL
DIN
DOUT
CLK
GA
GB
XJD
POK
INCZ
INCB
INCA
ERR
TPS
TPC
NCOS
PCOS
NSIN
PSIN
LED
VDDA
GNDA
Interface mode
I/O Ports Ground
+ 3V to +5.5 V I/O Ports Supply Voltage
SPI Clock Input
SPI Data Input
SPI Data Output
SPI Chip Select Input
Test Input NCOS
Test Input NSIN
Code Inversion Input
Shift Register Load Input
Shift Register Data Input
Shift Register Data Output
Shift Register Clock Input
Graycode Output A (MSB)
Graycode Output B (MSB-1)
Adjustment Signal
Power OK Indication
Incremental Output Z
Incremental Output B
Incremental Output A
Error Message Output
Test Input PSIN
Test Input PCOS
Analog Voltage Output NCOS
Analog Voltage Output PCOS
Analog Voltage Output NSIN
Analog Voltage Output PSIN
LED High Side Current Source
+ 4V to +5.5V Supply Voltage
Ground
Parallel mode
I/O Ports Ground
+ 3V to +5.5 V I/O Ports Supply Voltage
SPI Clock Input
SPI Data Input
SPI Data Output
SPI Chip Select Input
Parallel Output Bit 15
Parallel Output Bit 14
Parallel Output Bit 13
Parallel Output Bit 12
Parallel Output Bit 11
Parallel Output Bit 10
Parallel Output Bit 9
Parallel Output Bit 8
Parallel Output Bit 7
Parallel Output Bit 6
Parallel Output Bit 5
Parallel Output Bit 4
Parallel Output Bit 3
Parallel Output Bit 2
Error Message Output
Parallel Output Bit 1
Parallel Output Bit 0
Analog Voltage Output NCOS
Analog Voltage Output PCOS
Analog Voltage Output NSIN
Analog Voltage Output PSIN
LED High Side Current Source
+ 4V to +5.5V Supply Voltage
Ground
Table 9: Pad functions according to operating mode