UMA1021M/C2 Philips Semiconductors (Acquired by NXP), UMA1021M/C2 Datasheet - Page 36

• Manufacturer Part Number: UMA1021M/C2
• Description: UDA1380; Stereo Audio Coder-decoder For MD, CD And MP3
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
Table 29 Analog volume control
11.5
Using a 1-bit value, it is possible to disable the short-circuit protection of the headphone amplifier. This function is
provided to offer maximum freedom to users, however due to the nature of this function there is the drawback of possible
damage. Bits RSV12, RSV11, RSV10, RSV02, RSV01, and RSV00 are special control bits for manufacturer’s evaluation
and must always be kept at their default values for normal operation of UDA1380.
Table 30 Register address 04H
Table 31 Description of register bits
2003 Apr 04
Symbol
Default
Symbol
Default
15 to 11
AVCR5
AVCL5
Stereo audio coder-decoder
for MD, CD and MP3
7 to 3
BIT
BIT
BIT
10
0
0
0
0
0
1
1
1
9
8
2
1
0
:
:
Headphone amplifier settings
RSV12
RSV11
RSV10
RSV02
EN_SCP
RSV00
SYMBOL
AVCR4
AVCL4
15
0
0
0
0
0
0
0
1
7
:
:
Reserved bit. Default value 1
Reserved bit. Default value 0
not used
Reserved bit. Default value 0
Short circuit protection enable. A 1-bit value to enable the short circuit protection of the
headphone amplifier. When this bit is set to logic 0: short-circuit protection is disabled. When
this bit is set to logic 1: short-circuit protection is enabled. Default value 1. Short-circuit
detection is always enabled regardless of this bit.
Reserved bit. Default value 0
not used
Reserved bit. Default value 0
AVCR3
AVCL3
14
0
0
0
0
0
1
1
1
6
:
:
AVCR2
AVCL2
13
0
0
0
0
1
0
1
1
:
:
5
AVCR1
AVCL1
12
0
0
1
1
0
1
0
1
:
:
4
36
DESCRIPTION
AVCR0
AVCL0
11
0
1
0
1
0
1
0
1
:
:
3
RSV12
RSV02
10
0
2
0
VOLUME (dB)
EN_SCP
RSV11
(default)
16.5
13.5
10.5
15
12
48
Product specification
:
:
9
1
1
1
UDA1380
RSV10
RSV00
8
0
0
0