ak4373 ETC-unknow, ak4373 Datasheet - Page 55

• Manufacturer Part Number: ak4373
• Description: Low Power Stereo Dac With Hp/spk-amp
• Manufacturer: ETC-unknow

When writing to the AVL7-0 and AVR7-0 bits continuously, the control register should be written by an interval more
than zero crossing timeout. If not, AVL and AVR are not changed since zero crossing counter is reset at every write
operation. If the same register value as the previous write operation is written to AVL and AVR, this write operation is
ignored and zero crossing counter is not reset. Therefore, AVL and AVR can be written by an interval less than zero
crossing timeout.
(1) The AVL value becomes the start value if the AVL and AVR are different when the ALC starts. The wait time from
(2) Writing to AVL and AVR registers (09H and 0CH) is ignored during ALC operation. After ALC is disabled, the
MS0991-E-00
ALC bit = “1” to ALC operation start by AVL7-0 bits is at most recovery time (WTM2-0 bits) plus zerocross timeout
period (ZTM1-0 bits).
AVOL changes to the last written data by zero crossing or timeout. When ALC is enabled again, ALC bit should be
set to “1” by an interval more than zero crossing timeout period after ALC bit = “0”.
ALC bit
ALC Status
AVL7-0 bits
AVR7-0 bits
Internal AVL
Internal AVR
C6H(+20dB)
E1H(+30dB)
Figure 48. AVOL value during ALC operation
Disable
(1)
E1(+30dB) --> F1(+36dB)
E1(+30dB) --> F1(+36dB)
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E1H(+30dB)
C6H(+20dB)
Enable
(2)
C6H(+20dB)
E1(+30dB)
Disable
[AK4373]
2008/09