AK5374 Datasheet, PDF (13/51 Pages) Asahi Kasei Microsystems – 24-bit Stereo ADC with USB Interface

[AK5374]
■ Clock Source
16MHz or 24 MHz crystal resonator can be used as the master clock. When the CKM pin is set to “H”, the AK5374
supports 24MHz, and supports 16MHz when the CKM pin is set to “L”. The AK5374 can drive the clock up to three
external loads. The AK5374 generates 48MHz for system clock from 16MHz or 24MHz by system PLL circuit.
CKM pin
X’tal Frequency
L
16.0MHz
H
24.0MHz
Table 1. Reference X’tal frequency
The clock for the MCKI/XTI pin can be generated by the following methods:
1) X’tal (XTE pin = “H”)
MCKI/XTI
CLKO bit
CLKDRV
XTO
AK5374
Note 17. External capacitance depends on the crystal oscillator (Max. 30pF)
Figure 10. X’tal Mode
2) External clock (XTE pin = “L”)
MCKI/XTI
External Clock
CLKO bit
CLKDRV
XTO
AK5374
Note 18. Input clock must not exceed DVDD.
Figure 11. External clock mode
MS1197-E-00
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2010/05