NJU9214FG1 Просмотр технического описания (PDF) - Japan Radio Corporation
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Компоненты Описание
производитель
NJU9214FG1 Datasheet PDF : 28 Pages
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NJU9214
RC1
H
L
H
L
H
L
H
L
RC2
H
H
L
L
H
H
L
L
RC3
H
H
H
H
L
L
L
L
Mark Display
Non
ADP1
ADP2
X
X
X
X
X
Decimal Point
Non
P1
P1
X
X
X
X
X
Application Example
hfe Measurement
°C (Temp. Measurement)
°F (Temp. Measurement)
X
X
X
X
X
X : ( Don't Care )
( 5 ) Serial Data output
The NJU9214 has terminals (TXD,DTR,DSR) for serial data output with RS-232C format requiring a external
RS-232C I/F LSI.
When the TRX terminal is " L " level, data transmission is available, and when DSR terminal is also " L " level,
the data starts to output.
It selects the transmission rate by the TXS terminal, " L " level : 9,600bps, " H " level : 2,400bps.
The logic levels from all of output terminals are " L " ≤ 0.8V, " H " ≥ 4.2V.
(5-1) The structure of the serial data
An unit of serial data consists of 11bits. The first bit of data is Start bit, the 2nd to the 9th bits are Data bits,
the 10th and the 11th are Stop bits, therefore 11bits data structures a character as an unit.
The data is transmitted from the LSB in sequence. Regarding the data order, please refer to [ ( 5 - 3 )
RS-232C Data Format ].
The data is outputted with the ASCII code.
(5-2) Example of transmission waveform
Example of transmission waveform on the TXD terminal is shown below.
8 bit data
D0 D1 D2 D3 D4 D5 D6 D7
8 bit data
D0 D1 D2 D3 D4 D5 D6 D7
0 1 0 0 11 1 0 0 11 0 1 0 1 1 1 0 0 0 11
DATA 39 ( HEX )
DATA 1D ( HEX )
1 Character
1 Character
The stop bit length is 2 bits.
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