73k322l ETC-unknow, 73k322l Datasheet - Page 13

• Manufacturer Part Number: 73k322l
• Description: Ccitt V.23, V.22, V.21 Single-chip Modem
• Manufacturer: ETC-unknow

TONE REGISTER
BIT NO.
D0
D1
D2
D3, D2,
D1, D0
011
TR
OUTPUT
CONTR.
RXD
D7
Special Tone/
Answer Tone
Detect/Select
Guard Tone/
Overspeed
V.23 FDX
DTMF 1/
DTMF 2/
DTMF 3,
DTMF 0
NAME
2, 1, 0
TRANSMIT
CALLING
GUARD/
TONE
D6
TRANSMIT
CONDITION
D6 D5
D3 D2
ANSWER
X
X
X
X
X
1
1
0
1
TONE
D5
D4
0
0
X
X
X
X
X
1
1
0
1
0
1
D4 D0
D1
D1 D0
1
0
0
0
0
0
0
0
1
0
1
TRANSMIT
0 -
X
0
1
0
1
0
1
1
DTMF
D4
13
DESCRIPTION
D0 interacts with bits D6, D4, and CR0 as shown.
Transmit DTMF tones.
Select 1800 Hz guard tone if in V.22 and Answer mode in
CR0.
Select 550 Hz guard tone if in V.22 and Answer mode in
CR0.
Mark of an FSK mode selected in CR0 is to be detected
in D2 of DR.
2100 Hz answer tone will be detected in D2 of DR if V.21
or V.22 Originate mode is selected in CR0.
1300 Hz calling tone will be detected in D2 of DR if V.21,
or V.22 Answer mode is selected in CR0.
Transmit 2225 Hz Answer Tone
Transmit 2100 Hz Answer Tone
D1 interacts with D4 as shown.
Asynchronous DPSK 1200 or 600 bit/s +1.0% -2.5%.
Asynchronous DPSK 1200 or 600 bit/s +2.3% -2.5%.
Half-duplex asymmetric operation in V.23 mode.
Full-duplex (4-wire) operation in V.23 mode.
Programs 1 of 16 DTMF tone pairs that will be
transmitted when TX DTMF and TX enable bit (CR0, bit
D1) are set. Tone encoding is shown below:
EQUIVALENT
KEYBOARD
DTMF 3
1
2
3
4
5
6
7
D3
V.23 FDX
DTMF 2/
CCITT V.23, V.22, V.21
D3 D2 D1 D0
D2
0
0
0
0
0
0
0
DTMF CODE
Single-Chip Modem
0
0
0
1
1
1
1
0
1
1
0
0
1
1
DTMF 1/
SPEED
OVER-
1
0
1
0
1
0
1
D1
LOW
697
697
697
770
770
770
852
TONES
G.T./ANSW./
SP. TONE/
DTMF 0/
SELECT
HIGH
1209
1336
1477
1209
1336
1477
1209
D0