73K321L View Datasheet(PDF) - TDK Corporation
Part Name
Description
Manufacturer
73K321L Datasheet PDF : 24 Pages
| |||
73K321L
CCITT V.23, V.21
Single-Chip
DETECT REGISTER
D7
D6
DR
010
X
X
BIT NO.
D0
D1
NAME
Long Loop
Call Progress
Detect
D2
Special Tone
Detect
D3
D4
D5
D6, D7
Carrier
Detect
Unused
Receive Data
Not Used
D5
RECEIVE
DATA
CONDITION
0
1
0
1
0
1
0
1
Undefined
Undefined
D4
D3
D2
D1
D0
X
CARR. SPECIAL CALL
LONG
DETECT TONE PROG.
LOOP
DESCRIPTION
Indicates normal received signal.
Indicates low received signal level.
No call progress tone detected.
Indicates presence of call progress tones. The call progress
detection circuitry is activated by energy in the normal 350
to 620 Hz call progress band when CR0 D2 =1.
No special tone detected as programmed by CR0 bit D0
and Tone Register bit D0.
Special tone detected. The detected tone is:
(1) 2100 Hz answer tone if D0 of TR=1 and the device is
in V.21 Originate mode.
(2) 1300 Hz calling tone if D0 of TR=1 and the device is
in V.21 or V.23 Answer mode.
(3) an FSK mark for the mode the device is set to receive
in if D0 of TR = 0.
NOTE: Tolerance on special tones is ±3%.
No carrier detected in the receive channel.
Indicated carrier has been detected in the received
channel.
Not used in the 73K321L. Mask in software.
Continuously outputs the received data stream. This data
is the same as that output on the RXD pin, but it is not
disabled when RXD is tri-stated.
Mask in software.
10
Share Link: 