[AK4492]
9. Functional Descriptions
Each function of the AK4492 is controlled by Pins (pin control mode) and Registers (register control
mode) (Table 1). Select the control mode by setting the PSN pin. The AK4492 must be powered down
when changing the PSN pin setting. There is a possibility of malfunction if the device is not powered down
when changing the control mode since the previous setting is not initialized. Register settings are invalid
in pin control mode, and pin settings are invalid in register control mode.
Table 2 shows available functions of each control mode and Table 3 shows available functions in
PCM/DSD/EXDF mode.
Table 1. Pin/Register Control Mode Select
PSN pin
Control Mode
Register Control Mode
Pin Control Mode
L
H
Table 2. Function List @Pin/Register Control Mode
(Y: Available, -: Not available)
Register Control
Function
Pin Control Mode
Mode
DSD/EXDF Mode Select
System Clock Setting Select
Audio Format Select
TDM Mode
Digital Filter Select
De-emphasis Filter Select
Digital Attenuator
Zero Detection
-
Y
Y
Y
Y
Y
-
Y
Y
Y
Y
Y
Y
Y
Y
-
Mono Mode
-
Y
Output signal select
(Monoral,Channel select)
Output Signal Polarity Select
(Invert)
-
Y
Y
Y
DSD Full Scale Detect
Soft Mute
Register Reset
Clock Synchronization Function
Resistor Control
Gain Control
-
Y
-
-
-
Y
Y
Y
Y
Y
Y
Y
Y
Y
Heavy Load Mode
016011073-E-00
2016/12
- 36 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
