AK4357 Datasheet, PDF (19/27 Pages) Asahi Kasei Microsystems – 192kHz 24-Bit 6ch DAC with DSD Input

ASAHI KASEI
[AK4357]
n Mode Control Interface
Internal registers may be written by 3-wire µP interface pins , CSN, CCLK and CDTI. The data on this interface consists of
Chip Address (2bits, C1/0; fixed to “01”), Read/Write (1bit; fixed to “1”, Write only), Register Address (M SB first, 5bits) and
ControlData (MSB first, 8bits). The AK4357 latches the data on the rising edge of CCLK, so data should clocked in on the
falling edge. The writing of data becomes valid by CSN “↑”. The clock speed of CCLK is 5MHz (max).
PDN = “L” resets the registers to their default values. The internal timing circuit is reset by RSTN bit, but the registers are
not initialized.
CSN
CCLK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
CDTI
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
C1-C0:
R/W:
A4-A0:
D7-D0:
Chip Address (C1=CAD1, C0=CAD0)
READ/WRITE (Fixed to “1”, Write only)
Register Address
Control Data
Figure 11. Control I/F Timing
*The AK4357 does not support the read command and chip address.
*When the AK4357 is in the power down mode (PDN = “L”) or the MCLK is not provided, writing into the control register
is inhibited.
n Register Map
Addr
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
0AH
Register Name
Control 1
Control 2
Speed & Power Down Control
De-emphasis Control
LOUT1 ATT Control
ROUT1 ATT Control
LOUT2 ATT Control
ROUT2 ATT Control
LOUT3 ATT Control
ROUT3 ATT Control
Control 3
D7
ACKS
0
0
0
ATT7
ATT7
ATT7
ATT7
ATT7
ATT7
0
D6
SLOW
0
0
0
ATT6
ATT6
ATT6
ATT6
ATT6
ATT6
0
D5
DZFM
0
DFS1
0
ATT5
ATT5
ATT5
ATT5
ATT5
ATT5
DCKS
D4
DZFE
0
DFS0
0
ATT4
ATT4
ATT4
ATT4
ATT4
ATT4
D/P
D3
DIF2
0
PW3
0
ATT3
ATT3
ATT3
ATT3
ATT3
ATT3
DCKB
D2
DIF1
0
PW2
0
ATT2
ATT2
ATT2
ATT2
ATT2
ATT2
DZFB
D1
DIF0
SMUTE
PW1
DEM1
ATT1
ATT1
ATT1
ATT1
ATT1
ATT1
ATS1
D0
RSTN
RSTN
RSTN
DEM0
ATT0
ATT0
ATT0
ATT0
ATT0
ATT0
ATS0
Note: For addresses from 0BH to 1FH, data must not be written.
When PDN goes to “L”, the registers are initialized to their default values.
When RSTN bit goes to “0”, the only internal timing is reset, and the registers are not initialized totheir default values.
All data can be written to the registers even if PW1-3 or RSTN bit is“0”.
MS0088-E-02
- 19 -
2002/07