ak5359 AKM Semiconductor, Inc., ak5359 Datasheet - Page 10

• Manufacturer Part Number: ak5359
• Description: 24-bit 192khz ?? Adc
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MCLK, SCLK and LRCK (fs) clocks are required in slave mode. The LRCK clock input must be synchronized with
MCLK, however the phase is not critical. Table 1 shows the relationship of typical sampling frequency and the system
clock frequency. MCLK frequency, SCLK frequency, HPF (ON or OFF) and master/slave are selected by CKS2-0 pins as
shown in Table 2.
All external clocks (MCLK, SCLK and LRCK) must be present unless PDN pin = “L”. If these clocks are not provided,
the AK5359 may draw excess current due to its use of internal dynamically refreshed logic. If the external clocks are not
present, place the AK5359 in power-down mode (PDN pin = “L”). In master mode, the master clock (MCLK) must be
provided unless PDN pin = “L”.
Note: SDTO outputs 16bit data at SCLK=32fs.
Two kinds of data formats can be chosen with the DIF pin (Table 3). In both modes, the serial data is in MSB first, 2’s
compliment format. The SDTO is clocked out on the falling edge of SCLK. The audio interface supports both master and
slave modes. In master mode, SCLK and LRCK are output with the SCLK frequency fixed to 64fs and the LRCK
frequency fixed to 1fs.
MS0428-E-00
44.1kHz
192kHz
32kHz
48kHz
96kHz
System Clock
Audio Interface Format
fs
CKS2
H
H
H
H
L
L
L
L
24.576MHz
128fs
Mode
N/A
N/A
N/A
N/A
CKS1
0
1
H
H
H
H
L
L
L
L
DIF pin
CKS0
L
H
H
H
H
H
L
L
L
L
36.864MHz
192fs
N/A
N/A
N/A
N/A
HPF
OFF
24bit, I
ON
ON
ON
ON
ON
ON
ON
24bit, MSB justified
Table 3. Audio Interface Format
Table 1. System Clock Example
OPERATION OVERVIEW
2
SDTO
S Compatible
Master/Slave
Table 2. Mode Select
11.2896MHz
12.288MHz
24.576MHz
8.192MHz
Master
Master
Master
Master
Master
Master
Slave
Slave
256fs
N/A
- 10 -
MCLK
LRCK
128/192fs (108k<fs ≤ 216k)
128/192fs (108k<fs≤216k)
H/L
L/H
256/384fs (8k ≤ fs ≤ 108k)
256/384fs (8k≤fs≤108k)
12.288MHz
16.9344MHz
512/768fs (8k≤fs≤54k)
512/768fs (8k≤fs≤54k)
128fs (108k<fs≤216k)
192fs (108k<fs ≤ 216k)
18.432MHz
36.864MHz
256fs (8k ≤ fs ≤ 108k)
384fs (8k≤fs≤108k)
512fs (8k≤fs≤54k)
768fs (8k ≤ fs ≤ 54k)
384fs
N/A
MCLK
≥ 48fs or 32fs
≥ 48fs or 32fs
SCLK
22.5792MHz
16.384MHz
24.576MHz
512fs
N/A
N/A
Figure 1
Figure 2
Figure
≥ 48fs or 32fs
≥ 48fs or 32fs
SCLK
64fs
64fs
64fs
64fs
64fs
64fs
33.8688MHz
24.576MHz
36.864MHz
768fs
N/A
N/A
[AK5359]
2005/09