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參數(shù)資料
| 型號(hào)： | HI-1575PQIF |
| 廠商： | HOLT INTEGRATED CIRCUITS INC |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | 3.3V Dual Transceivers with Integrated Encoder / Decoders |
| 中文描述： | DATACOM, MIL-STD-1553 DATA BUS TRANSCEIVER, PQFP32 |
| 封裝： | ROHS COMPLIANT, PLASTIC, QFP-32 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 128K |
| 代理商： | HI-1575PQIF |
HI-1575
FIGURE 2. STATUS AND MODE REGISTER
Bit Name
0
TXDISA
R/W
0
WritingTXDISAtoa'1' disablesthetransmitterforMIL-STD-1553busA
1
TXDISB
R/W
0
WritingTXDISBtoa'1'disablesthetransmitterforMIL-STD-1553busB
2
RENA
R/W
1
Setting RENA to a '1' enables the receiver for MIL-STD-1553 bus A. A '0' disables the
receivercausingtheHI-1575toignoreallactivityonbusA.
3
RENB
R/W
1
Setting RENB to a '1' enables the receiver for MIL-STD-1553 bus B. A '0' disables the
receivercausingtheHI-1575toignoreallactivityonbusB.
4
TXSYNC
R/W
0
The TXSYNC bit is logically ORed with the SYNC input pin during host write cycles to the
Transmit Data Register (TX). If TXSYNC OR SYNC is a '1' the transmitter prefixes the
transmitted word with a MIL-STD-1553 Command Sync. If TXSYNC OR SYNC is a '0'
duringawritetoTX,thenthetransmittedwordhasaMIL-STD-1553DataSync.
5
CHAN
R/W
0
The CHAN bit is logically ORed with the
between MIL-STD-1553 bus A or B during write transfers to the TX register, or reading data
from the RX registers. When CHAN OR
data is transmitted on MIL-STD-1553 bus A. When the result is a '1', MIL-STD-1553
bus B is selected. During HI-1575 data read cycles, if CHAN OR
registerisaccessed,andifCHANOR
/CHBisa'1'thenthedataisreadfromRXB.
CHA
/CHB input pin and the result used to Select
/CHB is a '0' during a transmit operation,
/CHB is a '0', the RXA
6
-
Read-only
0
Notused.Internallysetto'0'.
7
RCVA
Read-only
0
This bit reflects the state of the RCVA output pin. RCVA goes high whenever a new word is
received on MIL-STD-1553 busA. The received word may be read by the host from the RXA
register. RCVAis reset on reading RXAor if the HI-1575 detects a new word arriving on busA.
If the data words are contiguous, then RCVA will be high for about 3 us before the new word
resets it. The data is still available in the RXA register and may be retreived any time up until
the RCVA flag goes high again. If the user does not read the data, the word is lost when
theRCVAflaggoeshighonreceptionofthenextword.
8
RSYNCA
Read-only
0
RSYNCAindicates the Sync of the last MIL-STD-1553 word received on busA. RSYNCAis a
'0' for a Data sync, and a '1' for a Command Sync. When the RXA register is read, the
RSYNCAvalueisalsooutputontheSYNCI/Opin.
9
GAPA
Read-only
0
GAPAisa'1'whenthereisnoactivitydetectedonMIL-STD-1553busA,forexampleduringan
inter-messagegap.GAPAisa'0'whenevertheHI-1575detectsbustraffic.
10
ERRORA
Read-only
0
ERRORAgoes high when the HI-1575 Manchester decoder receives an incorrectly encoded
wordonMIL-STD-1553busA
11
RCVB
Read-only
0
SamefunctionasRCVAbutforMIL-STD-1553busB.
12
RSYNCB
Read-only
0
SamefunctionasRSYNCAbutforMIL-STD-1553busB.
13
GAPB
Read-only
0
SamefunctionasGAPAbutforMIL-STD-1553busB.
14
ERRORB
Read-only
0
SamefunctionasERRORAbutforMIL-STD-1553busB.
15
SENDDATA Read-only
1
SENDDATA goes high approximately 3.5 us after the start of a MIL-STD-1553 word
transmission. SENDATA goes low approximately 18.5 us after the start of a MIL-STD-1553
word transmission. If new a new data word is written to the TX register while SENDDATA is
high,thatwordwillbetransmittedcontiguouslyafterthecurrentlytransmittingword.
R/W
Default
Description
CHA
CHA
CHA
15 14 13 12 11 10
MSB
9
8
7
6
5
4
3
2
1
0
LSB
RENA
TXTXDSA
NoCHTXRENB
HOLT INTEGRATED CIRCUITS
4
RCVA
RSYNCA
GAPA
ERRORA
0
RCVB
RSYNCB
GAPB
SEERRORB
STATUS & MODE REGISTER (SAM)
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| HI-1575PQM | 制造商:HOLTIC 制造商全稱:Holt Integrated Circuits 功能描述:3.3V Dual Transceivers with Integrated Encoder / Decoders |
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| HI-1575PQTF | 制造商:HOLTIC 制造商全稱:Holt Integrated Circuits 功能描述:3.3V Dual Transceivers with Integrated Encoder / Decoders |
| HI-1579_13 | 制造商:HOLTIC 制造商全稱:Holt Integrated Circuits 功能描述:MIL-STD-1553 / 1760 3.3V Monolithic Dual Transceivers |
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