W681310SG Nuvoton Technology Corporation of America, W681310SG Datasheet - Page 13

• Manufacturer Part Number: W681310SG
• Description: IC VOICEBAND CODEC 3V 1CH 20SOP
• Manufacturer: Nuvoton Technology Corporation of America
• Type: PCMr

Specifications of W681310SG

• Data Interface: PCM Audio Interface
• Resolution (bits): 8 b
• Number Of Adcs / Dacs: 1 / 1
• Sigma Delta: No
• Voltage - Supply, Analog: 2.7 V ~ 5.25 V
• Voltage - Supply, Digital: 2.7 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOP
• For Use With: W681360DK - KIT DEVELOPMENT FOR W681360
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

W681310
7.4.5. System Timing
The system can work at 256 kHz, 512 kHz, 1536 kHz, 1544 kHz, 2048 kHz, 2560 kHz, 4096 kHz & 4800
kHz master clock rates. The system clock is supplied through the master clock input MCLK and can be
derived from the bit-clock if desired. An internal pre-scaler is used to generate a fixed 256 kHz and 8
kHz sample clock for the internal CODEC. The pre-scaler measures the master clock frequency versus
the Frame Sync frequency and sets the division ratio accordingly. If the Frame Sync is LOW for the
entire frame sync period while the MCLK and BCLK pin clock signals are still present, the W681310 will
enter the low power standby mode. Another way to power down is to set the PUI pin to LOW. When the
system needs to be powered up again, the PUI pin needs to be set to HIGH and the Frame Sync pulse
needs to be present. It will take two Frame Sync cycles before the pin PCMT will become low
impedance.
Publication Release Date: January 2011
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Revision B17