IC-LNB_16 Datasheet, PDF (20/37 Pages) IC-Haus GmbH – 18-BIT OPTO ENCODER

iC-LNB 18-BIT OPTO ENCODER ^preliminary
WITH SPI AND SER/PAR INTERFACES
OPERATING MODES
Rev B2, Page 20/37
Device iC-LNB has two operating modes which are
selected 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 sensor
data readout, with an incremental interface including
an index signal (FlexCount active) for the output of en-
coder quadrature signals with a configurable resolution.
A power-on signal at pin POK indicates that the system
is enabled. Regardless of the FlexCount resolution dig-
ital 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 angle 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 purpose
all the relevant pins are reconfigured as outputs. Table
9 shows the pin functions for the respective operating
mode (also see the parallel encoder mode section on
page 32).
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