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| 型號： | BU-65843F3-320 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP80 |
| 封裝： | 0.880 INCH, CERAMIC, QFP-80 |
| 文件頁數(shù)： | 20/75頁 |
| 文件大?。?/td> | 532K |
| 代理商： | BU-65843F3-320 |
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27
Data Device Corporation
www.ddc-web.com
BU-65743/65843/65863/65864
D-06/04-0
Push Block
Status Word
PBS
0011
Not Used
(Don't Care)
Conditional
Push the Block Status Word for the most recent message on
the General Purpose Queue if the condition flag tests TRUE,
otherwise continue execution at the next OpCode in the
instruction list.
TABLE 52. BC OPERATIONS FOR MESSAGE SEQUENCE CONTROL (CONT.)
INSTRUCTION
MNEMONIC
OP CODE
(HEX)
PARAMETER
DESCRIPTION
Load Time Tag
Counter
LTT
000D
Time Value.
Resolution
(s/LSB) is
defined by bits 9,
8, and 7 of
Configuration
Register #2.
Conditional
Load Time Tag Counter with Time Value if the condition flag
tests TRUE, otherwise continue execution at the next
OpCode in the instruction list.
Load Frame
Timer
LFT
000E
Time Value
(resolution =
100 s/LSB)
Conditional
Load Frame Timer Register with the Time Value parameter
if the condition flag tests TRUE, otherwise continue execu-
tion at the next OpCode in the instruction list.
Start Frame
Timer
SFT
000F
Not Used
(Don't Care)
Conditional
Start Frame Time Counter with Time Value in Time Frame
register if the condition flag tests TRUE, otherwise continue
execution at the next OpCode in the instruction list.
Push Time Tag
Register
PTT
0010
Not Used
(Don't Care)
Conditional
Push the value of the Time Tag Register on the General
Purpose Queue if the condition flag tests TRUE, otherwise
continue execution at the next OpCode in the instruction list.
Push Immediate
Value
PSI
0012
Immediate Value
Conditional
Push Immediate data on the General Purpose Queue if the
condition flag tests TRUE, otherwise continue execution at
the next OpCode in the instruction list.
Push Indirect
PSM
0013
Memory
Address
Conditional
Push the data stored at the specified memory location on
the General Purpose Queue if the condition flag tests TRUE,
otherwise continue execution at the next OpCode in the
instruction list.
Wait for
External
Trigger
WTG
0014
Not Used
(Don't Care)
Conditional
Wait for a logic "0"-to-logic "1" transition on the EXT_TRIG
input signal before proceeding to the next OpCode in the
instruction list if the condition flag tests TRUE, otherwise
continue execution at the next OpCode without delay.
Execute and
Flip
XQF
0015
Message
Control /
Status Block
Address
Unconditional
Execute (unconditionally) the message referenced by the
Message Control/Status Block Address. Following the pro-
cessing of this message, if the condition flag tests TRUE,
then flip bit 4 in the Message Control/Status Block Address,
and store the new Message Block Address as the updated
value of the parameter following the XQF instruction code.
As a result, the next time that this line in the instruction list
is executed, the Message Control/Status Block at the
updated address (old address XOR 0010h), rather than
the old address, will be processed. If the condition flag tests
FALSE, the value of the Message Control/Status Block
Address parameter will not change.
CONDITIONAL
OR
UNCONDITIONAL
NOTE: While the XEQ (Execute Message) instruction is conditional, not all condition codes may be used to enable its use. The ALWAYS and NEVER condition codes may
be used. The eight general purpose flag bits, GP0 through GP7, may also be used. However, if GP0 through GP7 are used, it is imperative that the host processor not
modify the value of the specific general purpose flag bit that enabled a particular message while that message is being processed. Similarly, the LT, GT-EQ, EQ, and NE
flags, which the BC only updates by means of the CFT and CMT instructions, may also be used. However, these two flags are dual use. Therefore, if these are used, it is
imperative that the host processor not modify the value of the specific flag (GP0 or GP1) that enabled a particular message while that message is being processed. The
NORESP, FMT ERR, GD BLK XFER, MASKED STATUS SET, BAD MESSAGE, RETRY0, and RETRY1 condition codes are not available for use with the XEQ instruction
and should not be used to enable its execution.
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