IP200 ETC [List of Unclassifed Manufacturers], IP200 Datasheet - Page 13

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

5.2.3
Read data is loaded into the hold register by the RD0/ST command. This takes place when the internal
sequential control counter and the SYNC register have the same contents (synchronous mode) or when the
ASYNC bit is set (asynchronous mode). Pin SDO is low during the waiting time (meaning of RDY) .
With the SPI working in synchronous mode, the output data can be assigned to a sample time. Equidistant
measurement is possible (refer also to the application example). Higher transmission rates are achieved in
asynchronous mode.
Example: 32-bit read access synchronous with internal cycle counter
Figure 8
Example: 16-bit read access, asynchronous, 3 channels
Figure 9
Example: write access 1 Channel
Figure 10
SEN
SDI
SDO
Hold register
SEN
SDI
SDO
Hold register channel 0
Hold register channel 1
Hold register channel 2
SEN
SDI
SDO
D-09116 Chemnitz, Germany
Zwickauer Straße 227
Synchronous / Asynchronous Mode
GEMAC
Gesellschaft für
Mikroe lektronikanwendung Chemnitz mbH
RD0 H0
XXX
WRA (address)
XXX
RD0 / ST
XXXXXX
SYNC
RD0 H1
Data H0
WRD (data)
XXX
RDY
Phone:
Fax::
Internet:
Email:
Date: 20.04.04
RD1
Byte 0 +1
Data to be transmitted
Data to be transmitted
[phone] - 0
[phone]
www.gemac-chemnitz.de
[e-mail]
[e-mail]
RD0 H2
Data H1
Data to be transmitted
RDY
Page 13 of 30
Example: command execution 1 channel
SEN
SDI
SDO
Byte 2 + 3
RD0 / ST *)
Figure 11
RD0 H0
Data H2
WRC
(Command)
XXX
Data to be transmitted
*) any command
SYNC
Title:
Data Sheet GC-IP200
Name of Document:
43500-DB-2-1-E-IP200.pdf
RDY
Execution of command