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PT2310 V1.0

- 5 -

June, 2005

Volume Controller IC

PT2310

SERIAL BUS INTERFACE

The DATA, CK and STB pins consist of bus line; the bus line is for communication with the MCU and

the PT2310.

SERIAL DATA CODE

The data code is consists by L, R, D1~D4, LD, C1~C4 (totally 13 bits), at the end of the code there

needs a high strobe pulse to confirm the data code is validity.

LR D1 D2 D3 D4 D5 D6 LD C1 C2 C3 C4

CK

DATA

STB

CHIP SELECTION (C1~C4)

The Chip Selection code C1 is depending on the states of the CS pin, the CS pin in low state means the

C1 bit=0; and the CS pin in high state means the C1 bit=1. Ignore what states of the CS pin the C2, C3

and C4 bit is presets to the state 0, 1, 1.

CS

C1

C2

C3

C4

“1”

1

0

1

1

“0”

0

0

1

1

LEFT AND RIGHT CHANNEL CONTROL CODE

In the DATA code, the “L” bit is for left channel and the “R” is for right channel is selected. If the “L” bit

is 1 means the attenuation value (D1 to D6) is for left channel exclusively; and if “L” and “R” all are “1”

means attenuation value is for the both channel.

LOUDNESS SETUP CODE

The “LD” bit In the DATA code is for the Loudness function. When the “LD” bit is 0, the Loudness

function is turned off (LS1=Off, LS2=ON) and the “LD” bit is 1 means the Loudness is turned ON

(LS1=On, LS2=Off).