Cirrus Logic CDB6422 - Manual (Page 14)

CDB6422
14 DS295DB2
4.4 Usage Scenario #1: Analog Phone
Call with Separated Speaker and
Microphone
In this scenario, NIN4 is set to “POTS(DAA)” to
select the analog phone line as the network input
source. The analog phone line is plugged into the
RJ-11 jack (J6) called "Phone Line".
The CS6422 is configured from default settings
with the following:
reg 0: 9400 -- GB = '0.75dB/ms'
reg 3: 2006 -- PCSen = 'low'
reg 5: 004a -- ASdt = '-24dB'
To configure the CS6422 with the above:
1) press and release the "6422_RST" pushbutton
2) press and release the "LOAD" pushbutton
(once)
3) press '9' '4' '0' '0' on the keypad
4) press and release the "LOAD" pushbutton
(once)
5) press '2' '0' '0' '6' on the keypad
6) press and release the "LOAD" pushbutton
(once)
7) press '0' '0' '4' 'a' on the keypad
At this point, the CS6422 is loaded with the correct
configuration. To save this configuration in Con-
figuration set #1:
1) press and release the "LOAD" pushbutton (3)
times
2) press '1' on the keypad
To save this configuration in the RESET configu-
ration space (Configuration set #0):
1) press and release the "LOAD" pushbutton (3)
times
2) press '0' on the keypad
To recall a configuration:
1) press and release the "LOAD" pushbutton (2)
times
2) press the number on the keypad corresponding
to the Configuration set to recall.
To make a call:
1) slide the HOOK SWITCH to the “OFF HOOK”
position (you should hear a dial tone from the
speaker
2) dial the phone number to call using the keypad
3) when the far-end talker answers, begin speak-
ing in turns
4) after the echo cancellers have trained properly,
the system will move to full-duplex on its own
5) full-duplex operation can be verified by a dou-
ble-talk test in which both parties speak at the
same time
6) if the far-end talker does not hear the near-end
talker during far-end speech, then the CS6422
is in half-duplex mode. Continue speaking in
turns until the device switches to full-duplex
mode.
4.5 Usage Scenario #2: Cellular Call
through Analog Network Interface
In this scenario, NIN4 is set to “ACTIVE” to select
the NIN_RCA jack as the network input source.
The cellular phone is connected to NIN_RCA and
NOUT_RCA and the gain selection jumpers
NOUT3, NOUT4, NIN2, and NIN3 have been set
to match full-scale levels with the phone. The Net-
work Echo Canceller (NEC) is disabled because
there is no coupling between the NO pin on the
CS6422 and the NI pin.
The CS6422 is configured from default settings
with the following:
reg 0: 9400 -- GB = '0.75dB/ms'
reg 1: 0a02 -- Taps = '55.5ms'
reg 3: 2006 -- PCSen = 'low'