218 1100 Series WS MWS Reference Manual
7 Theory of Operation
Microtiter Plate Board (MTP)
Common Electronics
A common electronics and firmware design is used for all Agilent 1100 Series
LC modules. This core design provides a basic set a functions for each module.
ASIC — Application-Specific Integrated Circuit
The application-specific integrated circuit (ASIC) provides interfacing to
external devices through drivers, including CAN, APG Remote. It is directly
connected to the four control LEDs located near the connectors on this board
and the 8-bit configuration switch which is used to configure the address for
the communication, baud rate for RS-232 transfer, and so on. Also, the ASIC
controls and drives module specific functions and reads static status signals.
Leak Converter
Solvent leaking from the autosampler cools down the PTC. This changes the
resistance of the PTC causing the leak converter to generate a leak signal. The
leak converter consists of a PTC (for leak sensing) and an NTC (for
ambient-temperature compensation). This configuration ensures ambient
temperature changes do not affect the leak-sensing circuit.
Tabl e 62 Common Electronics
Core-processor MC68332
Core-memory The core unit has 3 memory blocks:
2MB SRAM
1 MB memory
128 KB NVRAM
24*8 serial NVRAM from the real time clock
Communication
Interfaces
The core unit supports direct the following interfaces:
CAN bus
RS232
Remote
MIO (LAN)
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