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TP11368 データシート(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 TP11368
部品情報  Octal Adaptive Differential PCM Processor
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

TP11368 データシート(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagrams
Pin Descriptions
TSI
Transmit PCM serial data input. TSI is an 8-bit PCM data
stream and is shifted into an 8-bit serial-to-parallel register
on the falling edges of PSCK while CE and TRB are high.
The last 8 bits of TSI are latched and transferred to the core
for processing at the falling edge of CE.
TSO
Transmit ADPCM TRI-STATE® serial data output. TSO is a
data bit stream of 4- to 5-bit length, and is shifted out with the
rising edge of ASCK when CE is high following the process-
ing of a transmit channel. TSO is in TRI-STATE mode while
CE is low or while RSO output is active.
RSI
Receive ADPCM serial data input. RSI is a data bit stream of
4- to 5-bit length, and is shifted in with the falling edges of
ASCK while CE is high and TRB is low. The last 4 or 5 bits of
RSI are latched and transferred to the core for processing at
the falling edge of CE.
RSO
Receive PCM TRI-STATE serial data output. RSO is an 8-bit
PCM data stream and is shifted out with the rising edges of
PSCK when CE is high following the processing of a receive
channel. RSO is in TRI-STATE mode while CE is low or while
TSO output is active.
PSCK
PCM serial clock input. PSCK is used to shift PCM data into
TSI or out of RSO while CE is active (high). The transfer de-
pends on the logic state of TRB.
ASCK
ADPCM serial clock input. ASCK is used to shift ADPCM
data into RSI or out of TSO while CE is active (high). The
transfer depends on the logic state of TRB.
CLK
Master clock input. CLK may be asynchronous to PSCK or
ASCK.
CE
Chip enable input. When CE is high, it enables data transfer.
The falling edge of CE latches and transfers the serial data
TSI or RSI to the core for processing and strobes the control
signals QSEL0, QSEL1, PCM1, EN and INIT. CE should
change state only when PSCK and ASCK are high. CE,
when low, sets the TSO and RSO outputs into TRI-STATE
mode.
TRB
Transmitter or receiver select. A logic low at TRB selects the
receiver of the channel processed. A logic high enables the
transmitter of the channel processed. TRB determines which
input register is enabled and which output register and out-
put is enabled. TRB should be stable while CE is high.
EN
Channel enable input. EN is strobed in with the falling edge
of CE. A logic high at the falling edge of CE indicates that the
channel is active, and the ADPCM will process the data just
clocked in.
INIT
Channel initialization input. INIT is read at the falling edge of
CE. A logic high at the falling edge of CE causes the ADPCM
processor to initialize the channel currently processing.
PCM1
PCM coding law select. A logic low at PCM1 selects 8-bit
µ-law, while a logic high selects 8-bit A-law with even bit in-
version.
Plastic Chip Carrier
DS012902-2
Top View
Order Number TP11368V
See NS Package Number V28A
Plastic Dual-In-Line
DS012902-3
Top View
Order Number TP11368N
See NS Package Number N24A
www.national.com
2


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