Pixsys TD240 series, Руководство по эксплуатации

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8.11 Area of EEProm
The area of memory EEProm is composed of 1000 words. This
memory is storage for data that must be maintained even if the
TD320 remains off for very long periods (over 6 months). The data
saved in this area are in fact tested at startup to verify their
integrity, and any anomalies are signalled by activating the bit
SM1.2, causing the initialization of the entire area to 0.
Access and writing to this area require a time significantly longer
than any other (order of 30/40 mS), thus it is advisable not to use it
for continual access (there is also a limit to the number of times
that an EEProm cell can be written to, of an order of 1000000
times), but only to copy at startup the data stored here, for
example to memory area V, and then use area V for an access
that is more rapid (order of 5/10
µ s).
8.12 Area of MMC
The memory area MMC is composed of 3000 words. This is the
memory storage where it is possible to save large quantities of
data and maintain it even in the absence of power. The memory is
of type EEProm. The resulting access is thus slower than area V
and SM and the TD240 executes no control of the integrity of the
data stored in this area.
8.13 Area of TX/RX EXP1
The memory area TX/RX EXP1 is composed of 200 bytes. This
area is used to manage the data in transit on the serial port EXP1.
The first 100 bytes (TX-0…TX-99) are used to load the data to
transmit, the last 100 bytes (RX-0…RX-99) are used to save the
data received by the serial port EXP1.
These bytes are useful only in the free-port mode, while in normal
mode they are managed directly by the protocol selected in the
programming phase.