AK5366VR Datasheet, PDF (29/42 Pages) Asahi Kasei Microsystems – 24-Bit 48kHz ΔΣ ADC with Selector/PGA/ALC

ASAHI KASEI
[AK5366VR]
„ Chip Address
In case of 3-wire control mode, the chip address is fixed to C1 bit = “1” and C0 bit = “0”. Table 12 shows the relationship
between chip address (C1-0 bits) and CAD1 pin in I²C-bus control mode.
CAD1 pin
C1 bit
C0 bit
L
0
Fixed to “1”
H
1
Fixed to “1”
Table 12. Chip address in I²C-bus control
Note : C1 bit should match with the input level of CAD1 pin.
„ 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 Chip address (2bits, Fixed to “10”), Read/Write (1bit, Fixed to “1”, Write only), Register address (MSB first,
5bits) and Control data (MSB first, 8bits). 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. The clock speed of
CCLK is 5MHz (max). The value of internal registers is initialized at PDN pin = “L”.
CSN
CCLK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
CDTI
C1 C0 R/W A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
C1 - C0 : Chip Address (C1="1", C0="0")
R/W : READ / WRITE (Fixed to "1" : WRITE only)
A4 - A0 : Register Address
D7 - D0 : Control Data
Figure 15. Serial Control I/F Timing
MS0526-E-00
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2006/07