73K212AL TDK [TDK Electronics], 73K212AL Datasheet - Page 9

• Manufacturer Part Number: 73K212AL
• Description: V.22, V.21, Bell 212A, Bell 103 Single-Chip Modem with Integrated Hybrid
• Manufacturer: TDK [TDK Electronics]

BIT NO.
D0
D1
D5, D4, D3, D2
D6
CR0
000
CONTROL REGISTER 0
MODUL.
OPTION
D7
Originate
Transmit
Transmit
Answer/
Enable
NAME
Mode
D6
0
TRANSMIT
MODE 3
D5
D5 D4
0
0
0
0
0
0
0
0
1
CONDITION
Single-Chip Modem with Integrated Hybrid
0
0
0
0
1
1
1
1
1
TRANSMIT
0
1
0
1
0
MODE 2
D3 D2
0
0
1
1
0
0
1
1
0
D4
0
1
0
1
0
1
0
1
0
DESCRIPTION
Selects answer mode (transmit in high band, receive
in low band).
Selects originate mode (transmit in low band, receive in
high band).
Disables transmit output at TXA.
Enables transmit output at TXA.
Note: TX Enable must be set to 1 to allow Answer Tone
and DTMF Transmission as well as data carriers.
Selects power-down mode. All functions disabled except
digital interface.
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.
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.
Slave synchronous mode. Same operation as other
synchronous modes. TXCLK is connected internally to
the RXCLK pin in this mode.
Selects PSK asynchronous mode - 8 bits/character
(1 start bit, 6 data bits, 1 stop bit).
Selects PSK asynchronous mode - 9 bits/character
(1 start bit, 7 data bits, 1 stop bit).
Selects PSK asynchronous mode - 10 bits/character
(1 start bit, 8 data bits, 1 stop bit).
Selects PSK asynchronous mode - 11 bits/character
(1 start bit, 8 data bits, Parity and 1 or 2 stop bits).
Selects FSK operation.
Not used; must be written as a “0.”
9
TRANSMIT
MODE 1
D3
V.22, V.21, Bell 212A, Bell 103
TRANSMIT
MODE 0
D2
TRANSMIT
ENABLE
D1
ORIGINATE
ANSWER/
D0