Teledyne 6200E - Sulfides Analyzer - Manual (Page 220)

Theory Of Operation Model 6200E Instruction Manual
220 M6200E Rev: A1
RS-485
(COM1 & COM2)
RS-232
COM2 COM1
Figure 10-11: M6200E CPU Board
The CPU includes two types of non-volatile data storage, one disk-on-chip and one or two flash
chips.
10.4.1.1. Disk On Chip
While technically an EEPROM, the disk-on-chip (DOC) appears to the CPU as, behaves as, and
performs the same function in the system as an 8 mb disk drive. It is used to store the
computer’s operating system, the Teledyne Analytical Instruments firmware, and most of the
operational data generated by the analyzer’s internal data acquisition system (iDAS - Sections
10.7.4 and 6.11).
10.4.1.2. Flash Chip
This non-volatile memory includes 64 kb of space. The M6200E CPU board can accommodate up
to two EEPROM flash chips. The M6200E standard configuration is one chip with 64 kb of storage
capacity, which is used to store a backup of the analyzer configuration as created during final
checkout at the factory. Separating this data onto a less frequently accessed chip significantly
decreases the chance of this key data getting corrupted.