AK4103AVF AKM [Asahi Kasei Microsystems], AK4103AVF Datasheet - Page 20

• Manufacturer Part Number: AK4103AVF
• Description: 192 KHZ 24 BIT DIT
• Manufacturer: AKM [Asahi Kasei Microsystems]

ASAHI KASEI
n Serial Control Interface
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. Figure 19 illustrates the serial data flow associated with SCI read and
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-00
WRITE
READ
CCLK
CDTO
CSN
CDTI
CDTO
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 P
5
*
*
CDTO
CDTO
CCLK
CCLK
Figure 19. Control I/F Timing
CDTI
CDTI
CSN
CSN
6
*
*
READ/WRITE (0:READ, 1:WRITE)
Don’t care
R/W
R/W
7
A7
A7
8
A6
A6
- 20 -
9
A5
A5
10
A4
11
A4
12
A3
A3
CSN1
CCLK
CDTI
CDTO
CSN2
A2
A2
13
A1
A1
14
P
A0
A0
15
D7
16
D7
D7
D6
D6
D6
17
D5
18
D5
D5
D4
19
D4
D4
“L”
D3
20
D3
D3
D2
21
D2
D2
D1
D1
D1
22
D0
23
D0
D0
[AK4103A]
2003/07
Hi-Z