AD1819A Analog Devices, AD1819A Datasheet - Page 24

• Manufacturer Part Number: AD1819A
• Description: ac '97 Soundport(r) Codec
• Manufacturer: Analog Devices

AD1819A
MULTIPLE CODE CONFIGURATION
Setting Up Multiple Codecs
The AD1819A may be used with up to two additional AD1819
or AD1819A codecs. In order to configure the codecs as Mas-
ter, Slave 1 or Slave 2, refer to the following table.
CS1
0
0
1
1
0 = Ground; 1 = V
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.
DD
.
CS0
0
1
0
1
Configuration
Slave 1 Codec
Slave 2 Codec
Master Codec
AC ’97 Mode Codec
–24–
Configure the Codec Resources
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.
REGM2 REGM1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
REGM0
0
1
0
1
0
1
0
1
Read
x
Master
Slave 1
Master
Slave 2
Master
Slave 1
Master
Write
x
Master
Slave 1
Master, Slave 1
Slave 2
Master, Slave 2
Slave 1, Slave 2
Master, Slave 1, Slave 2
REV. 0