ADAV4601 System Design Document
Confidential Information
Rev.1 August 2009
Analog Devices
Page 91
Bit No.
Bit Name
Description
Default
010b = output SPDIF_IN1
011b = output SPDIF_IN0
100b = output SPDIF_IN3
101b = output SPDIF_IN4
110b = output SPDIF_IN5
111b = output SPDIF_IN6
Bit[11]
SPDIF disable
Enable or disables the SPDIF transmitter.
0
0b = enabled
1b = disabled
Bit[10]
PRE Edge
Sets the edge to be used for the preamble.
0
0b = rising edge
1b = falling edge
Bit[9]
Validity
polarity
Used to indicate to the receiver if the data in the transmitted stream is
valid audio data.
0
0b = valid data sent
1b = invalid data sent
Bit[8]
Copy flag
Used to indicate to the receiver if the data is copyright material.
0
0b = copyright
1b = not copyright
Bits[7:0]
Channel status
Used to specify the type of equipment in use. Not applicable when the
SPDIF Mux Bits[14:12]
are set to anything other than 000b.
00000000
Address 0x000A Misc Control Register (Default: 0x8000)
Table 45.
Bit No.
Bit Name
Description
Default
Bit[15]
PWM ready flag (read-
only)
Indicates the current status of the PWM ready pin. When PWM
ready is low, the
PWM is not enabled. When PWM ready is high, the PWM is enabled
and stable.
0
0b = PWM ready pin low
1b = PWM ready pin high
Bit[14]
Enable selected PWM
channels
When enabled, all PWM channels selected by Bits[10:7] can be
used.
0
0b = all PWM channels disabled
1b = selected PWM channels enabled
Bit[13]
MCLK_OUT CLK type
select
Used to configure the MCLK_OUT pin.
0
0b = crystal frequency on MCLK_OUT
1b = internally generated clocks on MCLK_OUT
Bit[12]
PWM enable/disable
patterns
Enables the enable/disable patterns for the PWM block.
0
0b = enable/disable pattern not used
1b = Use enable/disable pattern
Bit[11]
DAC mod offset
Adds dc offset to the DAC Σ-∆ modulator to eliminate idle tones. It is
recommended
that this bit is disabled before
the ADC/DAC engine is powered up
in
Control Register 0x0007[1].
1
0b = enabled
1b = disabled
