ak4642e AKM Semiconductor, Inc., ak4642e Datasheet - Page 52

• Manufacturer Part Number: ak4642e
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
(1) 3-wire Serial Control Mode (I2C pin = “L”)
Internal registers may be written by using the 3-wire µP interface pins (CSN, CCLK and CDTI). The data on this interface
consists of a 2-bit Chip address (Fixed to “10”), Read/Write (Fixed to “1”), Register address (MSB first, 5bits) and
Control data (MSB first, 8bits). Each bit is clocked in on the rising edge (“↑”) of CCLK. Address and data are latched on
the 16th CCLK rising edge (“↑”) after CSN falling edge(“↓”). Clock speed of CCLK is 5MHz (max). The value of
internal registers are initialized by PDN pin = “L”.
MS0420-E-00
Serial Control Interface
CSN
CCLK
CDTI
C1-C0:
R/W:
A4-A0:
D7-D0:
C1 C0
“1”
0
“0”
1
R/W
“1”
2
Chip Address (C1 = “1”, C0 = “0”); Fixed to “10”
READ/WRITE (“1”: WRITE, “0”: READ); Fixed to “1”
Register Address
Control data
Figure 35. Serial Control I/F Timing
A4
3
A3
4
A2
5
A2 A0
6
- 52 -
7
D7 D6 D5 D4 D3 D2 D1 D0
8
9
10 11 12 13 14 15
[AK4642EN]
2005/09