Advantech PCL-841 Series, Руководство пользователя

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Appendix A Register structure 35
Acceptance Mask Register (AMR)
The Acceptance Mask Register is part of the acceptance filter of the
PCX82C200. This register can be accessed (read write) if the Reset
Request bit is set HIGH (present). The Acceptance Mask Register
classifies the corresponding bits of the acceptance code as “relevant”
or “don’t care” for acceptance filtering.
Bus Timing Register O (BTRO)
The Bus Timing Register O defines the values of the Baud Rate
Prescaler (BRP) and the Synchronization Jump Width (SJW). This
register can be accessed (read write) if the Reset Request bit is set
HIGH (present).
Bus Timing Register 1 (BTR1)
The Bus Timing Register I defines the length of the bit period the
location of the sample point, and the number of samples to be taken at
each sample point. This register can be accessed (read write) if the
Reset Request bit is set HIGH (present).
Output Control Register (OCR)
The Output Control Register allows, under software control, the setup
of different driver configurations. This register may be accessed (read
write) if the Reset Request bit is set HIGH (present).
Test Register (TR)
The Test Register is used only for production testing.
Transmit Buffer
The Transmit Buffer stores a message from the microcontroller to be
transmiued by the PCX82C200. It is subdivided into the Descriptor
and Data Field. The Transmit Buffer can be wrinen to and read from
by the microcontroller.
Receive Buffer
The layout of the Receive Buffer and the individual bytes correspond
to the definitions given for the Transmit Buffer layout, except that the
addresses start at 20 instead of 10.