ak5702 AKM Semiconductor, Inc., ak5702 Datasheet - Page 49

• Manufacturer Part Number: ak5702
• Description: 4-channel Adc With Pll & Mic-amp
• Manufacturer: AKM Semiconductor, Inc.

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(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 (2bits, “1x” x is designated by CAD0), 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(“↓”). CSN
should be set to “H” once after 16 CCLKs for each address. Clock speed of CCLK is 5MHz (max). The value of internal
registers are initialized by PDN pin = “L”.
MS0623-E-00
Serial Control Interface
CCLK
CDTI
CSN
Clock, “H” or “L”
“H” or “L”
C1-C0: Chip Address (C1 = “1”, C0 = CAD0)
R/W:
A4-A0:
D7-D0: Control data
C1 C0
0
1
Figure 46. Serial Control I/F Timing
R/W
2
READ/WRITE (“1”: WRITE, “0”: READ); Fixed to “1”
Register Address
A4
3
A3
4
A2
5
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A1 A0
6
7
D7 D6 D5 D4 D3 D2 D1 D0
8
9
10 11 12 13 14 15
Clock, “H” or “L”
“H” or “L”
[AK5702]
2007/06