AK4113_1 Datasheet, PDF (32/49 Pages) Asahi Kasei Microsystems – 192KHZ 24BIT DIR WITH 6:1 SELECTOR

ASAHI KASEI
[AK4113]
„ Serial Control Interface
1. 4-wire serial control mode (I2C pin = “L”)
The internal registers may be either written or read by the 4-wire µP interface pins: CSN, CCLK, CDTI & CDTO. The
data on this interface consists of Chip address (2bits, C1-0 are fixed to “00”), Read/Write (1-bit), Register address (MSB
first, 5-bits) and Control data (MSB first, 8-bits). Address and data is clocked in on the rising edge of CCLK and data is
clocked out on the falling edge. For write operations, data is latched after the 16th rising edge of CCLK, after a
high-to-low transition of CSN. For read operations, the CDTO output goes high impedance after a low-to-high transition
of CSN. The maximum speed of CCLK is 5MHz. PDN pin = “L” resets the registers to their default values.
CSN
CCLK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
CDTI
WRITE
CDTO
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
Hi-Z
READ
CDTI
CDTO
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
Hi-Z
Hi-Z
D7 D6 D5 D4 D3 D2 D1 D0
C1,C0:
R/W:
A4-A0:
D7-D0:
Chip Address (Fixed to “00”)
READ/WRITE (0:READ, 1:WRITE)
Register Address
Control Data
Figure 31. 4-wire Serial Control I/F Timing
* The control data can not be written when the CCLK rising edge is 15times or less or 17times or more during CSN pin
is “L”.
MS0349-E-02
- 32 -
2005/08