ak4114 AKM Semiconductor, Inc., ak4114 Datasheet - Page 16

• Manufacturer Part Number: ak4114
• Description: High Feature 192khz 24bit Digital Audio Interface Transceiver
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
The AK4114 includes the digital de-emphasis filter (tc=50/15µs) by IIR filter corresponding to four sampling frequencies
(32kHz, 44.1kHz, 48kHz and 96kHz). When DEAU bit=“1”, the de-emphasis filter is enabled automatically by sampling
frequency and pre-emphasis information in the channel status. The AK4114 goes this mode at default. Therefore, in
Parallel Mode, the AK4114 is always placed in this mode and the status bits in channel 1 control the de-emphasis filter.
In Serial Mode, DEM0/1 and DFS bits can control the de-emphasis filter when DEAU is “0”. The internal de-emphasis
filter is bypassed and the recovered data is output without any change if either pre-emphasis or de-emphasis Mode is
OFF.
The AK4114 has a power-down mode for all circuits by PDN pin can be partially powerd-down by PWN bit. The RSTN
bit initializes the register and resets the internal timing. In Parallel Mode, only the control by PDN pin is enabled. The
AK4114 should be reset once by bringing PDN pin = “L” upon power-up.
PDN Pin:
RSTN Bit (Address 00H; D0):
PWN Bit (Address 00H; D1):
MS0098-E-04
De-emphasis Filter Control
System Reset and Power-Down
All analog and digital circuit are placed in the power-down and reset mode by bringing PDN= “L”. All the
registers are initialized, and clocks are stopped. Reading/Witting to the register are disabled.
All the registers except PWN and RSTN are initialized by bringing RSTN bit = “0”. The internal timings are
also initialized. Witting to the register is not available except PWN and RSTN. Reading to the register is
disabled.
The clock recovery part is initialized by bringing PWN bit = “0”. In this case, clocks are stopped. The registers
are not initialized and the mode settings are kept. Writing and Reading to the registers are enabled.
PEM
1
1
1
1
1
0
PEM
FS3
1
1
1
1
1
1
1
1
0
0
0
0
1
x
Table 7. De-emphasis Auto Control at DEAU = “1” (Default)
Table 8. De-emphasis Manual Control at DEAU = “0”
DFS
FS2
0
0
0
0
1
1
1
1
x
0
0
0
0
x
(Others)
DEM1
FS1
0
1
1
1
x
0
0
1
1
0
0
1
1
x
- 16 -
DEM0
FS0
0
0
1
0
x
0
1
0
1
0
1
0
1
x
44.1kHz
44.1kHz
48kHz
32kHz
96kHz
48kHz
32kHz
96kHz
Mode
Mode
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Default
[AK4114]
2004/03