AK4452 Datasheet, PDF (30/82 Pages) Asahi Kasei Microsystems – 115dB 768kHz 32-bit 2ch Premium DAC

[AK4452]
■ Audio Interface Format
The AK4452 supports both PCM and DSD formats for digital input signal. Mode settings are available by the
pins (TDM1-0 pins, DIF pin and DCHAIN pin) and registers (TDM1-0 bits, DIF2-0 bits, SDS2-0 bits and
DCHAIN bit). The RSTN bit should be toggled in case these format setting bits are changed during operation.
[1] PCM Mode
Normal Mode (TDM1-0 bits=“00”)
Two channels audio data is shifted in via the SDTI1 pin using BICK and LRCK inputs. Eight data formats are
supported and selected by the DIF2-0 bits as shown in Table 13. In all formats the serial data is MSB first, 2's
compliment format and is latched on the rising edge of BICK. Mode 2 can be used in 16-bit and 20-bit MSB
justified and Mode 6 can be used in 16-bit, 20-bit and 24-bit MSB justified formats by zeroing the unused
LSBs.
TDM128 Mode (TDM1-0 bits=“01”)
Four channels audio data is shifted in via the SDTI1 pin using BICK and LRCK inputs. Data is selected by
SDS2-0 bits. BICK is fixed to 128fs. Six data formats are supported and selected by the DIF2-0 bits as shown
in Table 13. In all formats the serial data is MSB first, 2's compliment format and is latched on the rising edge
of BICK.
TDM256 Mode (TDM1-0 bits=“10”)
Eight channels audio data is shifted in via the SDTI1 pin using BICK and LRCK inputs. Data is selected by
SDS2-0 bits. BICK is fixed to 256fs. Six data formats are supported and selected by the DIF2-0 bits as shown
in Table 13. In all formats the serial data is MSB first, 2's compliment format and is latched on the rising edge
of BICK.
TDM512 Mode (TDM1-0 bits=“11”)
Sixteen channels audio data is shifted in via the SDTI1 pin using BICK and LRCK inputs. Data is selected by
SDS2-0 bits. BICK is fixed to 512fs. Six data formats are supported and selected by the DIF2-0 bits as shown
in Table 13. In all formats the serial data is MSB first, 2's compliment format and is latched on the rising edge
of BICK.
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2015/08