ak4387 AKM Semiconductor, Inc., ak4387 Datasheet - Page 15

• Manufacturer Part Number: ak4387
• Description: 106db 192khz 24-bit 2ch ?? Dac
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
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 (MSB first,
5bits) and Control Data (MSB first, 8bits). AK4387 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).
RSTN pin = “L” resets the registers to their default values. The internal timing circuit is reset by RSTN bit, but the
registers are not initialized.
*The AK4387 does not support the read command and chip address. C1/0 and R/W are fixed to “011”
*When the AK4387 is in the power down mode (RSTN pin = “L”) or the MCLK is not provided, writing into the control
Notes:
MS0429-E-00
Addr
00H
01H
02H
03H
04H
register is inhibited.
Mode Control Interface
Register Map
For addresses from 05H to 1FH, data must not be written.
When RSTN pin goes “L”, the registers are initialized to their default values.
When RSTN bit goes “0”, the only internal timing is reset and the registers are not initialized to their default
values. All data can be written to the register even if PW or RSTN bit is “0”.
The “0” register should be written “0”, the “1” register should be written “1” data.
Control 1
Control 2
Control 3
Lch ATT
Rch ATT
Register Name
CCLK
CSN
CDTI
ACKS
DZFE
ATT7
ATT7
C1
0
D7
0
C0
1
R/W
2
C1-C0: Chip Address (Fixed to “01”)
R/W:
A4-A0: Register Address
D7-D0: Control Data
ATT6
ATT6
A4
D6
3
0
1
0
Figure 8. Control I/F Timing
A3
4
READ/WRITE (Fixed to “1”, Write only)
A2
5
ATT5
ATT5
D5
A1
0
0
0
6
- 15 -
A0
7
D7
8
DFS1
INVL
ATT4
ATT4
DIF2
D4
D6
9
D5
10 11 12 13 14 15
D4
INVR
ATT3
ATT3
DFS0
DIF1
D3
D3
D2
D1
DEM1
DZFB
ATT2
ATT2
DIF0
D2
D0
DEM0
ATT1
ATT1
PW
D1
0
[AK4387]
SMUTE
2005/09
RSTN
ATT0
ATT0
D0
0