w681310 Winbond Electronics Corp America, w681310 Datasheet - Page 10

• Manufacturer Part Number: w681310
• Description: 3v Single-channel Voiceband Codec
• Manufacturer: Winbond Electronics Corp America

The power supply for the analog and digital parts of the W681310 must be 2.7V to 5.25V. This supply
voltage is connected to the V
ceramic capacitor.
The system has an internal precision voltage reference which generates the V
ground voltage. This voltage needs to be decoupled to V
capacitor.
The analog ground reference voltage is available for external reference at the V
needs to be decoupled to V
voltage is generated from the voltage on the V
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.
7.4. PCM I
7.3.1. Analog and Digital Supply
7.3.2. Analog Ground Reference Bypass
7.3.3. Analog Ground Reference Voltage Outpt
NTERFACE
BCLKR
64 kHz to 4.800 MHz
V
V
V
V
SS
SS
DD
DD
SS
DD
through a 0.01 μF ceramic capacitor. The analog ground reference
Table 7.3 PCM Interface mode selections
pin. The V
FSR
8 kHz
V
V
V
V
SS
DD
SS
DD
DD
REF
pin needs to be decoupled to ground through a 0.1 μF
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pin and is also used for the internal signal processing.
Interface Mode
Long or Short Frame Sync
ISDN GCI with active channel B1
ISDN GCI with active channel B2
ISDN IDL with active channel B1
ISDN IDL with active channel B2
SS
at the V
REF
pin through a 0.1 μF ceramic
DD
/2 mid-supply analog
AG
pin. This voltage
W681310