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參數(shù)資料
| 型號： | AK4387 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 106dB 192kHz 24-Bit 2ch ツヒ DAC |
| 中文描述： | 一零六分貝192kHz的24位2通道ツヒ數(shù)模轉(zhuǎn)換器 |
| 文件頁數(shù)： | 15/21頁 |
| 文件大?。?/td> | 257K |
| 代理商： | AK4387 |
ASAHI KASEI
[AK4387]
MS0429-E-00
2005/09
- 15 -
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 (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.
CDTI
CCLK
CSN
C1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
D4
D5
D6
D7
A1
A2
A3
A4
R/W
C0
A0
D0
D1
D2
D3
C1-C0: Chip Address (Fixed to “01”)
R/W: READ/WRITE (Fixed to “1”, Write only)
A4-A0: Register Address
D7-D0: Control Data
Figure 8. Control I/F Timing
*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
register is inhibited.
Register Map
Addr
Register Name
D7
D6
D5
00H
Control 1
ACKS
0
0
01H
Control 2
DZFE
1
0
02H
Control 3
0
0
0
03H
Lch ATT
ATT7
ATT6
ATT5
04H
Rch ATT
ATT7
ATT6
ATT5
Notes:
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.
D4
DIF2
DFS1
INVL
ATT4
ATT4
D3
DIF1
DFS0
INVR
ATT3
ATT3
D2
DIF0
DEM1
DZFB
ATT2
ATT2
D1
PW
DEM0
0
ATT1
ATT1
D0
RSTN
SMUTE
0
ATT0
ATT0
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