W6810 データシートの表示（PDF） - Winbond

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W6810

SINGLE-CHANNEL VOICEBAND CODEC

Winbond 

W6810

7.3. POWER MANAGEMENT

7.3.1. Analog and Digital Supply

The power supply for the analog and digital parts of the W6810 must be 5V +/- 10%. This supply

voltage is connected to the VDD pin. The VDD pin needs to be decoupled to ground through a 0.1 μF

ceramic capacitor.

7.3.2. Analog Ground Reference Bypass

The system has an internal precision voltage reference which generates the 2.5V mid-supply analog

ground voltage. This voltage needs to be decoupled to VSS at the VREF pin through a 0.1 μF ceramic

capacitor.

7.3.3. Analog Ground Reference Voltage Outpt

The analog ground reference voltage is available for external reference at the VAG pin. This voltage

needs to be decoupled to VSS through a 0.01 μF ceramic capacitor. The analog ground reference

voltage is generated from the voltage on the VREF pin and is also used for the internal signal

processing.

7.4. PCM INTERFACE

The PCM interface is controlled by pins BCLKR, FSR, BCLKT & FST. The input data is received

through the PCMR pin and the output data is transmitted through the PCMT pin. The modes of

operation of the interface are shown in Table 7.3.

BCLKR (Pin 9)

FSR (Pin 7) Interface Mode

64 kHz to 4.096 MHz 8 kHz

Long or Short Frame Sync

VSS

VSS

ISDN GCI with active channel B1

VSS

VDD

ISDN GCI with active channel B2

VDD

VSS

ISDN IDL with active channel B1

VDD

VDD

ISDN IDL with active channel B2

Table 7.3 PCM Interface mode selections

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