AD1819B
MULTIPLE CODE CONFIGURATION
Configure the Codec Resources
Setting Up Multiple Codecs
Programing REGM (2:0) bits in the Serial Configuration Regis-
ter (74h) allows the digital controller read write access to all the
internal registers on each codec according to the following table.
The AD1819B may be used with up to two additional AD1819
or AD1819B codecs. In order to configure the codecs as Mas-
ter, Slave 1 or Slave 2, refer to the following table.
REGM2 REGM1 REGM0 Read
Write
CS1
CS0
Configuration
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
x
x
0
0
1
1
0
1
0
1
Slave 1 Codec
Slave 2 Codec
Master Codec
AC’97 Mode Codec
Master
Slave 1 Slave 1
Master
Slave 2 Slave 2
Master
Slave 1 Slave 1, Slave 2
Master
Master
Master, Slave 1
Master, Slave 2
0 = Ground; 1 = VDD
.
The XTAL_IN pin on the Slave Codecs “must” be tied to
ground and the CHAIN_IN pin “must” be tied to ground on
the last codec Slave 1 (on a 2-codec design) or Slave 2 (on a
3-codec design). See Figures 15, 16 and 17.
Master, Slave 1, Slave 2
REV. 0
–24–
ADI [ ADI ]
