CDB6422 Cirrus Logic Inc, CDB6422 Datasheet - Page 15

• Manufacturer Part Number: CDB6422
• Description: Development Kit
• Manufacturer: Cirrus Logic Inc

Specifications of CDB6422

• Silicon Manufacturer: Cirrus Logic
• Application Sub Type: Telephone
• Kit Application Type: Communication & Networking
• Silicon Core Number: CS6422
• Description/function: Audio DSPs
• Operating Supply Voltage: 5 V to 12 V
• Product: Audio Modules
• Kit Contents: Evaluation Board
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: CS6422

To configure the CS6422 with the above:
1) press and release the "6422_RST" pushbutton
2) press and release the "LOAD" pushbutton
3) press '9' '4' '0' '0' on the keypad
4) press and release the "Load" pushbutton (once)
5) press '0' 'a' '0' '2' on the keypad
6) press and release the "LOAD" pushbutton
7) press '2' '0' '0' '6' on the keypad
8) press and release the "LOAD" pushbutton
9) press '0' '1' '4' 'a' on the keypad
At this point, the CS6422 is loaded with the correct
configuration. To save this configuration in Con-
figuration set #2:
1) press and release the "LOAD" pushbutton (3)
2) press '2' on the keypad
To recall a configuration:
1) press and release the "LOAD" pushbutton (2)
2) press the number on the keypad corresponding
To make a call:
1) initiate or answer a call from the cell phone
2) when the far-end talker answers, begin speak-
DS295DB2
(once)
(once)
(once)
times
times
to the Configuration set to recall.
ing in turns
reg 5: 014a -- NECD = '1', ASdt = '-24dB'
Note: if the cellular phone provides a net-
(disable NEC and enable acoustic
sidetone)
work sidetone (coupling between NO
and NI), then Taps should be set to
‘39.5ms/24ms’, and NECD should be
set to ‘0’.
3) after the echo canceller has trained properly,
4) full-duplex operation can be verified by a dou-
5) if the far-end talker does not hear the near-end
4.6
In this scenario, NIN4 is set to “CODEC” to select
the CODEC as the network input source. The cel-
lular phone is connected to the PCM header, and
the optional inversion jumpers on HDR27 are con-
figured for the proper polarity. The Network 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:
To configure the CS6422 with the above:
1) press and release the "6422_RST" pushbutton
2) press and release the "LOAD" pushbutton
3) press '9' '4' '0' '0' on the keypad
4) press and release the "Load" pushbutton (once)
5) press '0' 'a' '0' '2' on the keypad
6) press and release the "LOAD" pushbutton
the system will move to full-duplex on its own
ble-talk test in which both parties speak at the
same time
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.
(once)
(once)
Usage Scenario #3: Cellular Call
Through Digital Network Interface
reg 0: 9400 -- GB = '0.75dB/ms'
reg 1: 0a02 -- Taps = '55.5ms'
reg 3: 2006 -- PCSen = 'low'
reg 5: 014a -- NECD = '1', ASdt = '-24dB'
(disable NEC and enable acoustic
sidetone)
CDB6422
15