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参数资料
| 型号： | HI-8788PQT |
| 厂商： | HOLT INTEGRATED CIRCUITS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | ARINC INTERFACE DEVICE 16-BIT PARALLEL DATA CONVERTED 429&561 SERIAL DATA OUT |
| 中文描述： | 1 CHANNEL(S), SERIAL COMM CONTROLLER, PQFP32 |
| 封装： | PLASTIC, QFP-32 |
| 文件页数： | 3/7页 |
| 文件大小： | 135K |
| 代理商： | HI-8788PQT |
A0
Load
Data Bus
ARINC Bits
1
0
Word 1
Word 2
D0 - D15
D0 - D15
ARINC 1 - ARINC 16
ARINC 17 - ARINC 32
Figure 2. Order of transmitted data
Figure 1. Block Diagram
DATA
BUS
16 to 32 bit
mux
32 bit
buffer
register
32 bit
shift
register
WRITE
A0
16
32
32
status &
control
logic
XMT RDY
XMIT CLK
word gap
counter
bit
counter
output
logic
line
driver
PARITY ENB
561 DATA
561 SYNC
TXBOUT
TXAOUT
SLP1.5
FUNCTIONAL DESCRIPTION (Cont.)
The HI-8787 and HI-8788 have an on-chip line driver de-
signedtodirectlydrivetheARINC429bus.ThetwoARINC
outputs(TXAOUTandTXBOUT)provideadifferentialvolt-
age to produce a +10 volt One, a -10 volt Zero, and a 0 volt
Null. The slope of the ARINC outputs is controlled by the
SLP1.5 pin.IfSLP1.5is high,theoutputriseandfalltimeis
nominally1.5 s..IfSLP1.5issetlow,theriseandfalltimes
are10 s.
The HI-8787 has 37.5 ohms in series with each line driver
output. The HI-8788 has 10.0 ohms in series. The HI-8788
is for applications where external series resistance is
needed,typicallyforlightningprotectiondevices.
HOLT INTEGRATED CIRCUITS
3
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