AKM AKD4127-A Manuel - Page 2

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ASAHI KASEI

Operation sequence

1) Set up the power supply lines.

[VCC]

(Red)

[DGND]

(Black)

Each supply line should be distributed from the power supply unit.

The regulator can be supplied 3.3V to all circuits.

2) Set up the evaluation mode, jumper pins. (See the followings.)

3) Power on.

The AK4127 should be reset once bringing SW1 (PDN) "L" upon power-up.

Evaluation mode

(1) Setting for Input port

(1) When using DIR function of AK4114 (U3)

When using PORT1 (DIR) or J1 (COAX), nothing should be connected to PORT2 (INPUT).

• SW3 setting (See Table 1)

Upper-side is "H" and lower-side is "L".

The audio interface format of the AK4114 is fixed to 24bit, MSB justified. IDIF2-0 and PLL2-0 of SW3

should be used by default setting.

SW3 No.

= +5V (for regulator)

= 0V

JP2

IBICK

Name

DITH

PLL2

PLL1

PLL0

IDIF0

AK4127 Audio I/F Format Setting

IDIF1

IDIF2

Table 1. SW3 Setting

JP3

JP4

SDTI

ILRCK

ON ("H")

OFF ("L")

Dither ON

Dither OFF

PLL Mode Setting

Fixed to default

- 2 -

[AKD4127-A]

Default

2006/11