Pepper Computer Modular Computers RS485 - Manual (Page 81)

SMART I/O User’s Manual
©1996 PEP Modular Computers GmbH March 12, 1996 Page 3 - 3
3
Chapter 3 SMART-EXT
3. SMART-EXT
The SMART-EXT is a carrier unit enabling the connection of a further 2
SMART-Modules thereby enhancing the I/O capacity of the SMART I/O
system. Up to 4 of these extensions may be cascaded via a 10-wire flat-band
cable with integrated 3-wire SPI (Serial Peripheral Interface). To achieve a
common interface between modules, a SMART I/O ‘C’ library is provided by
PEP.
3.1 Specifications
Controller
- Frequency
- Firmware MC68HC705C8A
4 MHz
PEP Firmware for OTP device
Interface Speed Set to 1 MHz
Power Consumption Typ. 25 mW
Temperature Range
- Storage
- Standard
- Extended
-20
°
C to + 125
°
C
0
°
C to +70
°
C
-40
°
C to +85
°
C
Operating Humidity 0 to 95% non-condensing
Weight
260g (without modules, blank
panels or screw terminals
The SPI follows a Motorola defined communication protocol which is
beyond the scope of this manual to describe. More information may be found
by referring to the relevant data-sheets.