w681360 Winbond Electronics Corp America, w681360 Datasheet - Page 13

• Manufacturer Part Number: w681360
• Description: 3v Single-channel 13-bit Linear Voice-band Codec
• Manufacturer: Winbond Electronics Corp America

The Sign-bit extended mode is entered by applying a logic “0” to the BCLKR pin while all other clocks
are clocked normally. In standard 13-bit mode the first bit is the sign bit. In this mode the device
transmits and receives 16-bit data where the sign bit is extended to the first four data bits. The PCM
timing for this mode is illustrated below.
The Receive Path Adjust Mode is entered by applying a logic “1” to the BCLKR pin while all other
clocks are clocked normally. In this mode the device receives 16-bit data where the last three bits are
coefficients to program the Receive Gain Adjust Attenuation described above. The PCM timing for
this mode is illustrated below.
LONG FRAME
SHORT OR
FST (FSR)
(BCLKR)
(BCLKR)
BCLKT
BCLKT
SYNC
PCMR
PCMR
PCMT
PCMT
(FSR)
FST
7.4.3. Special 16-bit Receive Modes
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7.4.3.1. Sign-Extended Mode Timing
7.4.3.2. Receive Gain Adjust Mode Timing
Transmit and Receive both use BCLKT, and the first four data bits are the sign bit.
1
1
1
1
2
2
2
2
Short Frame Sync (Transmit and Receive Have Individual Clocking)
FIGURE 7.5: SHORT FRAME SYNC PCM MODE
3
3
3
3
FIGURE 7.6: SIGN EXTENDED MODE
4
4
4
4
FST may occur at a different time than FSR
5
5
5
5
6
6
6
6
Sign-Extended (BCLKR=0)
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7
7
7
8
8
8
8
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Publication Release Date: September 2005
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W681360
Revision A.2
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