AK4640_05 AKM [Asahi Kasei Microsystems], AK4640_05 Datasheet - Page 42
AK4640_05
Manufacturer Part Number
AK4640_05
Description
16-Bit ?? CODEC with MIC/HP/SPK-AMP
Manufacturer
AKM [Asahi Kasei Microsystems]
Datasheet
1.AK4640_05.pdf
(78 pages)
- Current page: 42 of 78
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ASAHI KASEI
(1) 4-wire Serial Control Mode (I2C pin = “L”)
Internal registers may be written by using the 4-wire µP interface pins (CSN, CCLK, CDTI and CDTO). The data on this
interface consists of a 2-bit Chip address, Read/Write, Register address (MSB first, 5bits) and Control data (MSB first,
8bits). The chip address high bit is fixed to “1” and the lower bit is set by the CAD0 pin. Address and data is clocked in on
the rising edge of CCLK and data is clocked out on the falling edge. After a low-to-high transition of CSN, data is latched
for write operations and CDTO bit outputs Hi-Z. The clock speed of CCLK is 5MHz (max). The value of internal
registers is initialized at PDN pin = “L”.
MS0273-E-02
Serial Control Interface
Write
Read
CSN
CCLK
CDTI
CDTO
CDTI
CDTO
C1 - C0 : Chip Address (C1="1", C0=CAD0)
R/W :
A4 - A0 : Register Address
D7 - D0 : Control Data
C1
C1
0
READ / WRITE ("1" : WRITE, "0" : READ)
C0
C0
1
R/W
R/W
2
Figure 32. Serial Control I/F Timing
A4
A4
3
A3
A3
4
Hi-Z
A2
A2
5
- 42 -
A1
A1
6
Hi-Z
A0
A0
7
D7
D7
8
D6
D6
9
D5
D5
10
D4
D4
11
D3
D3
12
D2
D2
13
D1
D1
14
D0
D0
15
[AK4640]
Hi-Z
2005/04
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