UDA1341TS/N1 データシートの表示（PDF） - Philips Electronics

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UDA1341TS/N1

Economy audio CODEC for MiniDisc (MD) home stereo and portable applications

Philips Electronics 

Philips Semiconductors

Economy audio CODEC for MiniDisc (MD)

home stereo and portable applications

Preliminary specification

UDA1341TS

7.21.4 DATA1 CONTROL

Table 33 Data transfer of type ‘DATA1’

BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

PL5 PL4 PL3 PL2 PL1 PL0 peak level value (6 bits)

READ-OUT DATA

7.21.4.1 Peak level value

A 6-bit value to indicate the peak level value of the

playback data. The largest value of the left and right

channel data in the playback signal path is held since the

last read-out of the microcontroller.

Table 34 Peak level read-out data

PL5 PL4 PL3 PL2 PL1 PL0

PEAK VALUE(1)

(dB)

0 0 0 0 0 0 −∞

0 0 0 0 0 1 n.a.

0 0 0 0 1 0 n.a.

0 0 0 0 1 1 −90.31

0 0 0 1 0 0 n.a.

0 0 0 1 0 1 n.a.

0 0 0 1 1 0 n.a.

0 0 0 1 1 1 −84.29

: : : : : ::

0 1 0 0 1 1 note 2

0 1 0 1 0 0 note 3

: : : : : ::

1 1 1 1 0 1 −2.87

1 1 1 1 1 0 −1.48

1 1 1 1 1 1 0.00

Notes

1. Peak value (dB) = (Peak level − 63.5) × 5 × log 2.

2. For peak data >010011, the error in the peak value is

< 1----1-----×---4--l-o---g------2--

3. For peak data <010100, the error is larger due to

limited bit length.

1998 Dec 18

20

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