Philips Semiconductors
Preliminary specification
Economy audio CODEC for MiniDisc (MD)
home stereo and portable applications
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
READ-OUT DATA
PL5 PL4 PL3 PL2 PL1 PL0 peak level value (6 bits)
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
PEAK VALUE(1)
PL5 PL4 PL3 PL2 PL1 PL0
(dB)
0
0
0
0
0
0
0
0
:
0
0
0
0
0
0
0
0
:
0
0
0
0
0
0
0
0
:
0
0
0
0
1
1
1
1
:
0
0
1
1
0
0
1
1
:
0
1
0
1
0
1
0
1
:
−∞
n.a.
n.a.
−90.31
n.a.
n.a.
n.a.
−84.29
:
0
0
:
1
1
:
0
0
:
0
1
:
1
0
:
1
0
:
note 2
note 3
:
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
0
1
−2.87
−1.48
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
11 × log 2
<
--------------------------
4
3. For peak data <010100, the error is larger due to
limited bit length.
1998 Dec 18
20
NXP [ NXP ]
