IC-PVL Datasheet, PDF(19/33 Page) IC-Haus GmbH – LINEAR/OFF-AXIS BATTERY-BUFFERED HALL MULTITURN ENCODER

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IC-PVL Datasheet, PDF (19/33 Pages) IC-Haus GmbH – LINEAR/OFF-AXIS BATTERY-BUFFERED HALL MULTITURN ENCODER

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iC-PVL LINEAR/OFF-AXIS

preliminary

BATTERY-BUFFERED HALL MULTITURN ENCODER

SERIAL INTERFACE MODE (SEL = LOW)

Rev B3, Page 19/33

iC-PVL can be connected to a singleturn sensor or in-

terpolator via its serial interface. To ensure compatibility

with different devices, iC-PVLâs serial interface can op-

erate in two distinct modes: standard SSI or in a chain

mode.

In SSI mode, iC-PVL replies to a multiturn data request

of an SSI protocol master. The master takes care of

data synchronization and calculates a consistent abso-

lute position. Data input DI is not used in this operating

mode. iC-PVL is compatible with all iC-Haus optical

or magnetic singleturn encoders featuring a multiturn

interface (MTI). For details refer to the application ex-

amples of Figure 13 and Figure ?? on Page 28.

In SSI mode, iC-PVL can also be used as stand-alone

magnetic period counter. The position data is output

in an SSI compatible protocol (see Figure 15 on Page

29).

MT_GRAY

Code

Addr. 0x00; bit 1

Format

Binary code

Gray code

Table 17: Multiturn and PCR output data format via port

Note: The usage of ST_GRAY = 1 in chain mode is

limited. If activated, all data to input DI is converted

to binary code. This conversion may lead to an

unclean ending of the SSI communication. In this

case, instead of a timeout at logic low level, a timeout

at logic high level is received. If this is not appropriate,

the exact singleturn input bit width can be defined by

configuration parameter SYNC_BW which is not used

in chain mode.

In chain mode, a singleturn sensor transmits its single-

turn position to the data input DI of iC-PVL. In this mode,

iC-PVL takes care of synchronization, calculates a con-

sistent absolute position and outputs at data output DO,

comparable to a shift register, with MSB first.

SYNC_BW

Addr. 0x05; bit 1:0

Code

Input bit width

all bits (default)

14 bit

16 bit

18 bit

Table 18: Number of expected and converted input

The operating mode is set using parameter INT_MODE.

bits at pin DI with ST_GRAY = 1

INT_MODE

Addr. 0x00; bit 0

Code

Mode

Standard SSI read-out mode (SSI mode)

Chain mode (chain mode)

Table 15: Serial interface operating mode

The internal multiturn counter is 40 bit wide. In appli-

cations where smaller counter depths are sufficient or

the bit width of the serial interface is limited, the out-

put length of the counter value can be configured with

MT_BW as shown in Table 19.

By default, the iC-PVL expects binary data at input DI,

and also outputs its counted multiturn position (and

PCR) at DO in binary format. In case one data or both

data is required in Gray format, this can be configured

by setting the ST_GRAY bit or the MT_GRAY bit, re-

spectively.

MT_BW

Code

0x00

0x01

...

0x1E

0x1F

Addr. 0x01; bit 4:0

Bit width

9 bit

10 bit

...

39 bit

40 bit

ST_GRAY

Code

Addr. 0x00; bit 2

Format

Binary code

Gray code

Table 16: Singleturn input data format via port DI (in

chain mode)

Table 19: Bit width of multiturn data and counter

Additionally, iC-PVL can transmit up to 3 synchro-

nization bits, according to configuration parameter

SYNC_BW shown in Table 20.

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