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參數(shù)資料
| 型號(hào)： | BU-65142F1-430Y |
| 英文描述： | Controller Miscellaneous - Datasheet Reference |
| 中文描述： | 控制器雜項(xiàng)-數(shù)據(jù)表參考 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大小： | 219K |
| 代理商： | BU-65142F1-430Y |
4
ERROR FLAGS
Four error flags are ouput to the subsystem to provide informa-
tion on the condition of the BUS-65142.
The
(Message Error) line goes LOW if any of the fol-
lowing error conditions exist:
format error
word count error
invalid word
sync error
RT to RT address error
T/R bit error.
The
(Remote Terminal Failure) line goes LOW
whenever the results of a continuous wraparound self-test
shows a discrepancy, or a transmitter watchdog timeout
has occurred.
The
(Handshake Failure) line goes LOW whenev-
er the system dows not issue a
in response to a
before timing-out.
The
(RT Address Error) line goes LOW
whenever the sum of the 5 address lines and parity lines
show a parity error (the terminal will not respond to com-
mands while this error condition exists).
ERR
RTADR
DTREQ
DTGRT
HSFAIL
RTFAIL
ME
STATUS REGISTER
Six inputs to the BUS-65142 allow the subsystem host CPU to
control bits in the RTU status word. The Illegal Command input
may be used to set the Message Error bit in the Status Word and
suppress the transmission of data to the bus controller. This line
allows illegalization of any combination of commands. The
latched Command Word may be connected to the address pins
of an optional external PROM, which would drive the Illegal
Command line LOW when it identifies a command programmed
as illegal.
STATUS REGISTER BIT ASSIGNMENTS
The
(Subsystem Request) line is used to set the
Status Word service request bit.
The
(Accept Dynamic Bus Control) line is used to
set the Status Word bus control bit.
The
(RT Flag Line) is used to set the Status Word
terminal flag bit.
The
(Busy) line is used to set the Status Word busy
bit, and inhibit subsystem requests for data.
The
(SubSystem Flag) line is used to set the
Status Word subsytem (fault) flag.
SSFLAG
BUSY
RTFLAG
ADBC
SRQ
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BU-65142F1-430Z | Controller Miscellaneous - Datasheet Reference |
| BU-65142F1-440 | Controller Miscellaneous - Datasheet Reference |
| BU-65142F1-440K | Controller Miscellaneous - Datasheet Reference |
| BU-65142F1-440L | Controller Miscellaneous - Datasheet Reference |
| BU-65142F1-440Q | Controller Miscellaneous - Datasheet Reference |
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