73K224L-28IH TDK [TDK Electronics], 73K224L-28IH Datasheet - Page 12

• Manufacturer Part Number: 73K224L-28IH
• Description: V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem
• Manufacturer: TDK [TDK Electronics]

73K224L
V.22bis/V.22/V.21/Bell 212A/Bell 103
Single-Chip Modem
TONE REGISTER
BIT NO.
D0
D1
D2
011
TR
OUTPUT
CONTR.
RXD
D7
Answer/ Guard
Overspeed
WIRE FDX
DTMF 2/4
Extended
(continued)
DTMF 0/
DTMF 1/
NAME
TRANSMIT
Tone
GUARD
TONE
D6
D6 D5
TRANSMIT
1
1
ANSWER
CONDITION
TONE
D5
D4
D4
0
0
0
0
0
0
D4 D0
D1
D2
0
0
0
1
0
1
TRANSMIT
0
1
DTMF
D4
DESCRIPTION
D0 interacts with bits D6, D5, and D4 as shown.
Select 1800 Hz guard tone.
Select 550 Hz guard tone.
D1 interacts with D4 as shown.
Asynchronous QAM or DPSK +1.0% -2.5%. (normal)
Asynchronous QAM or DPSK +2.3% -2.5%. (extended
overspeed)
Selects 2 wire duplex or half duplex
D2 selects 4 wire full duplex in the modulation mode
selected. The receive path corresponds to the ANS/ORIG
bit CR0 D0 in terms of high or low band selection. The
transmitter is in the same band as the receiver, but does
not have magnitude filtering or equalization on its signal as
in the receive path.
12
DTMF 3
D3
WIRE FDX
DTMF 2/4
D2
OVER- SPEED
EXTENDED
DTMF 1/
D1
ANSWER/
DTMF 0/
GUARD
D0