mc145428dw Lansdale Semiconductor, Inc., mc145428dw Datasheet - Page 2

• Manufacturer Part Number: mc145428dw
• Description: Asynchronous?to?synchronous And Synchronous?to? Asynchronous Converter
• Manufacturer: Lansdale Semiconductor, Inc.

ML145428
V DD . POSITIVE POWER SUPPLY
V SS . NEGATIVE POWER SUPPLY
TxD. TRANSMIT DATA INPUT
baud or more of logic low. One stop bit is required
RxD. RECEIVE DATA OUTPUT
the data word length are selected by teh SB and DL pins. Idle
is logic high; break is a continuous logic low.
TxS. TRANSMIT STATUS OUTPUT
data words or if RESET is low.
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The most positive power supply pin, normally 5 volts.
The most negative supply pin, normally 0 volts.
Input for asynchronous data, idle is logic high; break is 11
Output for asynchronous data. The number of stop bits and
This pin will go low if the transmit FIFO holds 2 or more
ML145428 DSI PIN DESCRIPTIONS
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RxS. RECEIVE STATUS OUTPUT
is lost or not established or if RESET is low, or if the receive
FIFO is overwritten.
SB, STOP BITS INPUT
MATTER will re–create when outputting data at the RxD
asynchronous output. A high on this pin selects two stop bits; a
low selects one stop bit.
DL, DATA LENGTH INPUT
data to be input at the TxD asynchronous input between the
start and stop bits. The DL input also instructs the DSI’s SYN-
CHRONOUS CHANNEL RECEIVER and SYNCHRONOUS
CHANNEL TRANSMITTER to expecct 8 or 9 bit data words
and also instructs the DSI’s DATA FORMATTER to re–create
8 or 9 data bits between the start and stop bits when outputting
data at its RxD asynchronous output. A high on this pin selects
a 9 bit data word, a low selects an 8 bit data word length.
This pin will go low if framing of the synchronous channel
This pin controls the number of stop bits the DATA FOR-
This pin instructs the DSI to look for either 8 or 9 bits of
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