Cirrus Logic AN312 - Manual (Page 5)

AN312REV2 5
AN312
3.1.3 0x01 Mode - External Word Clock
External Word Clock Mode allows synchronization of all CobraNet clocks with an externally supplied word
clock. The external clock can be any integral division of FS1 from 750 Hz to 48 kHz. This is most often
used to synchronize a CobraNet network with a house sync signal whereby the Conductor will supply the
network clock and operate in this mode with Performer Nodes operating in 0x00 Mode. When operating
in this mode:
• As Conductor: The VCXO generating MCLK is steered to synchronize with REFCLK. FS1 and SCLK
are derived from MCLK.
• As Performer: The VCXO generating MCLK is steered to synchronize with REFCLK. FS1 and SCLK
are derived from MCLK.
Figure 7. 0x01 Mode Typical Connection (External Sync Attached to Conductor)
Note: Connection used to provide synchronized audio clocks via Ethernet
Figure 8. 0x01 Mode Typical Connection - External Sync
CobraNet Interface
(External Word Clock Mode)
(conductor)
FS1
SCLK
From house sync REFCLK
MCLK_OUT
CobraNet Interface
(External Word Clock Mode)
(conductor)
FS1
SCLK
From house sync REFCLK
MCLK_OUT