PD72042B_15 Datasheet, PDF (70/92 Pages) Renesas Technology Corp – LSI DEVICE FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL

µPD72042B
6.1 COMMUNICATION FLAGS
Table 6-1 lists the communication flags used in the main and interrupt routines, excluding those flags assigned
to the registers of the µPD72042B.
Table 6-1 Communication Flags
Name
RAWF
TRRQ
TRCF
I
RERQ^Note
RECF^Note
SIZE^Note
PW^Note
PR^Note
J
MCRQ
SDRQ
CORQ
MTRQF
MRRQF
STRQF
SLREF
Description
Program crash detection flag (1: Detected, 0: Not detected)
Transmission processing request flag (1: Requested, 0: Not requested)
Transmission status (TRC stored)
Number of bytes in transmission data set in TBF
Reception processing request flag (1: Requested, 0: Not requested)
Reception status (REC stored)
Number of bytes in reception data which can be read from RBF (RDR1/RDR2 stored)
Write pointer for RERQ, RECF, and SIZE
Read pointer for RERQ, RECF, and SIZE
Number of bytes in reception data which has actually been read from RBF
Master communication processing request flag (1: Requested, 0: Not requested)
Slave data transmission processing request flag (1: Requested, 0: Not requested)
Command processing request flag (1: Requested, 0: Not requested)
Master transmission request flag (1: Requested, 0: Not requested)
Master reception request flag (1: Requested, 0: Not requested)
Slave data transmission request flag (1: Requested, 0: Not requested)
Slave broadcast reception enable flag (1: Enabled, 0: Disabled)
Note RERQ, RECF, and SIZE are stored in a buffer pair pointed to by PW and PR.
• Buffer configuration
Pointer
RERQ
0
1
RECF
SIZE
Remark Buffers pointed to by the write pointer (PW)
Buffers pointed to by the read pointer (PR)
: RERQW, RECFW, and SIZEW
: RERQR, RECFR, and SIZER
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Data Sheet S13990EJ3V0DS