AK4635 AKM [Asahi Kasei Microsystems], AK4635 Datasheet - Page 60
AK4635
Manufacturer Part Number
AK4635
Description
16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP
Manufacturer
AKM [Asahi Kasei Microsystems]
Datasheet
1.AK4635.pdf
(81 pages)
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(1) 3-wire Serial Control Mode (I2C pin = “L”)
Internal registers may be written and read by using the 3-wire µP interface pins (CSN, CCLK and CDTIO). The data on
this interface consists of Read/Write, Register address (MSB first, 7bits) 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. Data writing is valid on the
rising edge of the 16th CCLK after the falling edge of CSN. CSN should be set to “H” every after a data writing for each
address. In reading operation, the CDTIO pin changes to output mode at the falling edge of 8th CCLK and outputs
D7-D0. The output finishes on the rising edge of CSN. However this reading function is available only at READ bit = “1”.
When READ bit = “0”, the CDTIO pin stays as Hi-Z even after the falling edge of 8th CCLK. The CDTIO pin is placed
in a Hi-Z state except outputting data at read operation mode. The clock speed of CCLK is 5MHz (max). The value of
internal registers is initialized at the PDN pin = “L”.
Note 44. It is available for reading the address 00H ~ 11H, 20H ~ 24H and 30H. When reading the address 12H ~ 1FH,
Rev. 0.6
Serial Control Interface
CSN
CCLK
CDTIO
25H ~ 2F and 31H ~ 4FH, the register values are invalid.
Clock, “H” or “L”
“H” or “L”
R/W:
A6-A0:
D7-D0:
A6 A5
0
1
R/W
2
Figure 53. Serial Control I/F Timing
READ/WRITE (“1”: WRITE, “0”: READ)
Register Address
Control data
A4
3
A3
4
A2
5
A1 A0
- 60 -
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”
[AK4635]
2007/10
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