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參數(shù)資料
| 型號(hào)： | UPD72042BGT |
| 廠商： | NEC Corp. |
| 英文描述： | LSI DEVICES FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL |
| 中文描述： | LSI器件間設(shè)備BusTM（IEBusTM）協(xié)議控制 |
| 文件頁數(shù)： | 70/92頁 |
| 文件大?。?/td> | 541K |
| 代理商： | UPD72042BGT |
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μ
PD72042A, 72042B
70
DATA SHEET S13990EJ2V0DS00
Name
Description
RAWF
Program crash detection flag (1: Detected, 0: Not detected)
TRRQ
Transmission processing request flag (1: Requested, 0: Not requested)
TRCF
Transmission status (TRC stored)
I
Number of bytes in transmission data set in TBF
RERQ
Note
Reception processing request flag (1: Requested, 0: Not requested)
RECF
Note
Reception status (REC stored)
SIZE
Note
Number of bytes in reception data which can be read from RBF (RDR1/RDR2 stored)
PW
Note
Write pointer for RERQ, RECF, and SIZE
PR
Note
Read pointer for RERQ, RECF, and SIZE
J
Number of bytes in reception data which has actually been read from RBF
MCRQ
Master communication processing request flag (1: Requested, 0: Not requested)
SDRQ
Slave data transmission processing request flag (1: Requested, 0: Not requested)
CORQ
Command processing request flag (1: Requested, 0: Not requested)
MTRQF
Master transmission request flag (1: Requested, 0: Not requested)
MRRQF
Master reception request flag (1: Requested, 0: Not requested)
STRQF
Slave data transmission request flag (1: Requested, 0: Not requested)
SLREF
Slave broadcast reception enable flag (1: Enabled, 0: Disabled)
Pointer
RERQ
RECF
SIZE
0
1
.
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
μ
PD72042A or
μ
PD72042B.
Table 6-1 Communication Flags
Note
RERQ, RECF, and SIZE are stored in a buffer pair pointed to by PW and PR.
Buffer configuration
Remark
Buffers pointed to by the write pointer (PW)
Buffers pointed to by the read pointer (PR)
: RERQ
W
, RECF
W
, and SIZE
W
: RERQ
R
, RECF
R
, and SIZE
R
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