IP200 ETC [List of Unclassifed Manufacturers], IP200 Datasheet - Page 11

• Manufacturer Part Number: IP200
• Description: Interpolation Circuit for Incremental Measuring Systems
• Manufacturer: ETC [List of Unclassifed Manufacturers]

5
The measurement results can be read out over the integrated serial interface (SPI). It is also possible to
make a more detailed configuration of the IP200 IC over this interface than over hardware. For high speed
applications the additional 16-bit wide parallel port allow to read out the measurement results continuously
with up to 32MBit/s.
5.1
5.2
The serial interface contains a 16-bit shift register for read accesses and write accesses each. An additional
16-bit hold register series for the intermediate storage of the two MSB’s during read accesses. An 8-bit
address register is used for both read and write accesses. Writing into the IP200 takes place in a byte-
oriented manner whilst reading being a word-oriented process. Transmission itself is effected as 16-bit
words. A read command triggers the pertinent data output during the next access. A single-byte command is
executed at the end of data transmission. Up to 16 channels can be operated at this interface. The hardware
address of the IC is determined by reading the DP(3:0) pins by a special command.
5.2.1
The IP200 is a slave which evaluates commands and data received, but which is unable to start a
communication process. The SPI protocol is executed via 4 lines:

The used SPI-protocol is not compatible to the usual micro controller- or DSP-families.
D-09116 Chemnitz, Germany
Interfaces
Zwickauer Straße 227
SDI
SDO
SCLK
SEN
Structure
Figure 6
Serial Interface (SPI)
Signals
GEMAC
Gesellschaft für
Mikroe lektronikanwendung Chemnitz mbH
SPI
Data input
Data output (open drain), SDO also serving as the RDY signal
Clock
Enable
Cycle Counter
SPI
C-CNT
D_OUT
D_IN
ADR
RD0/ST
Phone:
Fax::
Internet:
Email:
Date: 20.04.04
SYNC
RD-Register Bank
WR-Register Bank
W1
W0
W2
W3
W4
R0
R1
...
...
R8
[phone] - 0
[phone]
www.gemac-chemnitz.de
[e-mail]
[e-mail]
nDTHLD
SPI-RD-Reg.
1
Page 11 of 30
PAR-RD-Reg.
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CE
D Q
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OUTHIGH
Title:
Data Sheet GC-IP200
Name of Document:
43500-DB-2-1-E-IP200.pdf
D(15:0)