AK4342 Datasheet, PDF (29/43 Pages) Asahi Kasei Microsystems – 24-Bit Stereo DAC with HP-AMP & 2V Line-Out

ASAHI KASEI
[AK4342]
„ Serial Control Interface
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 “01”), 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 CSN falling edge (“↓”). Clock speed of CCLK is 5MHz (max). The value of internal registers are initialized by PDN
pin = “L”.
CSN
CCLK
CDTI
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
C1-C0:
R/W:
A4-A0:
D7-D0:
Chip Address (Fixed to “01”)
READ/WRITE (Fixed to “1”, Write only)
Register Address
Control Data
Figure 21. Serial Control I/F Timing
MS0506-E-02
- 29 -
2006/07