FEDL2302DIGEST-05
OKI Semiconductor
ML2302
RECORDING TIME AND MEMORY CAPACITY
The recording time of the ML2302 is dependent on the storage capacitance of external memory, the sampling
frequency, and the width of ADPCM bits that have been specified. The recording time of the ML2302 is expressed
by
Memory size (in kbits)
Sampling frequency (kHz) × Width of ADPCM bits
4080
4096
×
Recording time =
For example, when 8.0 kHz of sampling frequency, 4 bits of ADPCM2, and 8 Mbits of memory size are set, the
recording time is calculated below.
8000
8.0 × 4
4080
4096
Recording time =
×
= 249 seconds = 4 minutes 9 seconds
CONNECTION OF POWER SUPPLY
The ML2302 contains a single power supply as shown in Figure 7.1.
The power supply is connected to the analog unit and digital unit separately.
DVDD
AVDD
ML2302
DGND
AGND
Figure 7.1
Avoid following power supply connections.
Power supply for the analog circuit
Power supply for the digital circuit
Power supply
DVDD
DVDD
AVDD
DVDD
DVDD
AVDD
Figure 7.2
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