73K322L-IP datasheet(9/30 Pages) TDK

Part #	73K322L-IP

Description	CCITT V.23, V.22, V.21 Single-Chip Modem

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Manufacturer	TDK [TDK Electronics]

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73K322L

CCITT V.23, V.22, V.21

Single-Chip Modem

9

CONTROL REGISTER 0

D7

D6

D5

D4

D3

D2

D1

D0

CR0

000

MODUL.

OPTION

TRANSMIT

MODE 3

TRANSMIT

MODE 2

TRANSMIT

MODE 1

TRANSMIT

MODE 0

TRANSMIT

ENABLE

ANSWER/

ORIGINATE

BIT NO.

NAME

CONDITION

DESCRIPTION

D0

Answer/

Originate

0

Selects Answer mode in V.21 and V.22 (transmit in high

band), receive in low band or in V.23 HDX mode, receive

at 1200 bit/s and transmit at 75 bit/s.

Selects Originate mode in V.21 and V.22 (transmit in low

band), receive in high band or in V.23 HDX mode,

receive at 75 bit/s and transmit at 1200 bit/s.

1

Note: This bit works with TR bit D0 to program special

tones detected in Tone Register. See detect and tone

registers.

0

Disables transmit output at TXA.

Enables transmit output at TXA.

D1

Transmit Enable

1

Note: Answer tone and DTMF TX control require TX

enable.

D5 D4 D3 D2

00

0

Selects Power Down mode. All functions disabled except

digital interface.

0

1

Internal Synchronous mode. In this mode TXCLK is an

internally derived 1200 Hz signal. Serial input data

appearing at TXD must be valid on the rising edge of

TXCLK. Receive data is clocked out of RXD on the falling

edge of RXCLK.

00

1

0

External Synchronous mode. Operation is identical to

internal synchronous, but TXCLK is connected internally

to EXCLK pin, and a 1200 Hz ± 0.01% clock must be

supplied externally.

00

1

Slave Synchronous mode. Same operation as other

Synchronous modes. TXCLK is connected internally to

the RXCLK pin in this mode.

01

0

Selects DPSK Asynchronous mode - 8 bits/character (1

start bit, 6 data bits, 1 stop bit).

0

1

0

1

Selects DPSK Asynchronous mode - 9 bits/character (1

start bit, 7 data bits, 1 stop bit).

0

1

0

Selects DPSK Asynchronous mode - 10 bits/character (1

start bit, 8 data bits, 1 stop bit).

0

1

Selects DPSK Asynchronous mode - 11 bits/character (1

start bit, 8 data bits, Parity and 1 or 2 stop bits).

D5, D4,D3,

D2

Transmit Mode

1

0

Selects FSK operation.

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