7005 查看數據表（PDF） - Aeroflex Corporation
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7005 Datasheet PDF : 29 Pages
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Bit Name
Function
7
BUSY BIT
RTU BUSY
HIGH- BUSY
LOW - NOT BUSY
MASTER RESET SETS BIT HIGH
8
RT/BC
Remote Terminal/Bus Controller Bit. This line, when set HIGH, causes the hybrid
to function as a Remote Terminal. When set LOW, it will function as a Bus
Controller. Master Reset sets this bit HIGH
9
Transaction/ Transaction/Test Mode Bit. When this bit is set high, normal transactions will be
Test
handled, eg., BC to RT, RT to BC, RT to RT. If this bit is set low and a trigger
transaction is issued, the self-test will be performed for the MIL-STD-1553
protocol chip.
10
LT Local
Loop Test Local Bit (Used in conjunction with BIT 9). This signal selects the self
test path. When set LOW, the internal digital path is selected. When set HIGH,
the external path, including transceivers, is selected.
11
Bus Select Bus Select (Bus Controller Only). When set high, Bus 1 is selected. When set
LOW, Bus 0 is selected.
12 Normal/RT-RT Normal/Remote Terminal-Remote Terminal Bit. When set HIGH, BC to RT and
RT to BC transfers are performed. When set LOW RT to RT transfers are
performed. Two command words are required and two returned status words will
be expected.
13
SERV REQ/ Service Request/Auto-Retry (LSB) Bit.
Auto-Retry
RT MODE: A LOW in this bit will cause the service request
(LSB)
bit in the status word to be set.
BC MODE: This is the LSB of the Auto-Retry options. See
table on this page, Bit 14
14
SERR
Subsystem Error/Auto-Retry (MSB) Bit.
Auto-Retry
RT MODE: A LOW in this bit will cause a Subsystem Error
(MSB)
Bit in the status word to be set.
BC MODE: This is the MSB of the Auto-Retry option
AUTO-RETRY OPERATIONS
Options selected:
Bit 14
0
0
1
1
Bit 13
0
1
0
1
Auto-Retry Other Bus
Bit 15
0
1
No Retry
P
P/P
P/P/P
No Retry
S
P/S
P/S/S
15
DBCACC/ Dynamic Bus Control Accept/Auto-Retry Bus Bit.
Auto-Retry
RT MODE: This bit should be LOW if the subsystem is able to accept
Other Bus
control of the bus, if offered.
BC MODE: This bit should be HIGH if an invalid transfer is to be
retried according to the selected auto-retry option listed
above.
Table 7 – Operational Register (continued)
Aeroflex Circuit Technology
15
SCD7005 REV B 8/2/01 Plainview NY (516) 694-6700
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