AK4103A_09 AKM [Asahi Kasei Microsystems], AK4103A_09 Datasheet - Page 20

• Manufacturer Part Number: AK4103A_09
• Description: 192kHz 24-Bit DIT
• Manufacturer: AKM [Asahi Kasei Microsystems]

■
In asynchronous mode, four of the dual function pins become CSN, CCLK, CDTI and CDTO, a 4 wire microprocessor
interface. The internal 18 byte control register can then be read and written. The contents of the control register define,
in part, the mode of operation for the AK4103A.
write operations. C1-0 bits are the chip address. The AK4103A looks for C1-0 bits to be a “11” before responding to
the incoming data. R/W is the Read/ Write bit which is “0” for a read operation and “1” for a write operation. The
register address contained in A7-0 bits is decoded to select a particular byte of the control register. D7-0 bits on CDTI
pin is the control data coming from the microprocessor during a write operation. D7-0 bits on CDTO pin is the contents
of the addressed byte from the control register requested during a read operation. The address and data bits are framed
by CSN pin = “0”. During a write operation, each address and data bit is sampled on the rising edge of CCLK. During a
read operation, the address bits are sampled on the rising edge of CCLK while data on CDTO is output on the falling
edge of CCLK. CCLK has a maximum frequency of 5 MHz.
MS0251-E-01
WRITE
READ
Serial Control Interface
CCLK
CDTO
CDTO
CSN
CDTI
CDTI
C1
C1
0
C0
Note: External pull-up resistor should not be attached to CDTO pins
C0
1
2
*
Hi-Z (with pull-down resistor)
*
Hi-Z (with pull-down resistor)
since CDTO pin is internally connected to the pull-down resistor.
3
*
*
AK4103A
AK4103A
4
C1-C0: Chip Address (Fixed to “11”)
R/W:
*:
A7-A0: Register Address
D7-D0: Control Data
*
*
Figure 20. Typical connection with μP
5
*
*
CDTO
CDTO
Figure 19. Control I/F Timing
CCLK
CCLK
CDTI
CDTI
CSN
CSN
6
*
*
READ/WRITE (0:READ, 1:WRITE)
Don’t care
Figure 19
R/W
R/W
7
A7
A7
8
A6
- 20 -
A6
9
illustrates the serial data flow associated with SCI read and
A5
A5
10
A4
11
A4
A3
12
A3
CSN1
CCLK
CDTI
CDTO
CSN2
A2
13
A2
μP
A1
14
A1
A0
A0
15
D7
16
D7
D7
D6
D6
D6
17
D5
D5
D5
18
19
D4
D4
D4
“L”
D3
D3
D3
20
D2
21
D2
D2
D1
D1
22
D1
D0
D0
D0
23
[AK4103A]
2009/01
Hi-Z