UDA1321 Datasheet, PDF (22/44 Pages) NXP Semiconductors – Universal Serial Bus USB Digital-to-Analog Converter DAC

Philips Semiconductors
Universal Serial Bus (USB)
Digital-to-Analog Converter (DAC)
Preliminary specification
UDA1321
BYTE
(HEX)
REGISTER
NAME
11 GP1 and GP2 outputs
definition register
COMMENTS
reserved
reserved
application GP2 function 2
application GP1 function 2
polarity GP2 function 1
polarity GP1 function 1
polarity GP2 function 2
polarity GP1 function 2
12
GP1 Usage Page if HID selected
13
GP1 Usage if HID selected
14
GP2 Usage Page if HID selected
15
GP2 Usage if HID selected
16
time between releasing standby and
enabling the audio output; steps of
20 ms
17
time between ‘no isochronous data
present’ and activating the mute
output; steps of 1 s (only applicable for
function 1, no digital I/O
communication)
18
time between activating the mute
output and activating the standby
output; steps of 5 s (only applicable for
function 1, no digital I/O
communication); when filled-in with
zero, standby will not be activated
19
default bass boost value on top of
Bass USB DAC for Dynamic Bass
Boost (DBB); see Table 5
1A
default volume value of USB DAC
1B
idVendor high byte
1C
idVendor low byte
1D
idProduct high byte
1E
idProduct low byte
1F
bmAttributes
20
maximum power steps of 2 mA with
maximum 500 mA
BIT
VALUE
7
6
5
0 = HID output 2
1 = LED output 2 (activated
when DBB is active)
4
0 = HID output 1
1 = LED output 1 (activated
when mute is active)
3
normal or inversed output
2
functionality:
1
0 = according Table 7
1 = inversed
0
bass boost = register value; if
bass boost + Bass USB DAC
is larger then the maximum
value of Table 5, the maximum
value is used (no bass boost
in flat mode)
volume = −register value
1998 Oct 06
22