adsp-bf527c Analog Devices, Inc., adsp-bf527c Datasheet - Page 12

• Manufacturer Part Number: adsp-bf527c
• Description: Blackfin Embedded Processor
• Manufacturer: Analog Devices, Inc.

ADSP-BF523C/ADSP-BF525C/ADSP-BF527C
Software control is shown in
Table 7. Headphone Output Software Control
The recommended external components are shown in
with C1 = 220 μF (10 V electrolytic) and R1 = 47 kΩ.
C1 is a dc blocking capacitor that isolates the dc of the HPOUT
from the headphones. R1 is a pull-down resistor that discharges
C1 to prevent damage to the headphones.
Register
Address
000 0010 6:0 LHPVOL[6:0] 1111001
000 0011 6:0 RHPVOL[6:0] 1111001
HPOUT
Bit Label
7
8
7
8
Figure 15. Headphone Output External Circuit
LZCEN
LRHPBOTH
RZCEN
RLHPBOTH
+
C1
AGND
Default Description
( 0 dB )
0
0
( 0 dB )
0
0
Table
R1
7.
Left Channel Headphone Output Volume Control
+6 dB (1111111) in 1 dB steps down to –73 dB(0110000 )
0000000 to 0101111 = MUTE
Left Channel Zero-Cross Detect Enable
1 = Enable
0 = Disable
Simultaneous Load of Left Channel Volume, Mute and Zero-Cross Data to Right Channel
1 = Enable Simultaneous Load of LHPVOL[6:0] and LZCEN to RHPVOL[6:0] and RZCEN
0 = Disable Simultaneous Load
Right Channel Headphone Output Volume Control
+6 dB (1111111) in 1 dB steps down to –73 dB(0110000 )
0000000 to 0101111 = MUTE
Right Channel Zero-Cross Detect Enable
1 = Enable
0 = Disable
Simultaneous Load of Right Channel Volume, Mute and Zero-Cross Data to Left Channel
1 = Enable Simultaneous Load of RHPVOL[6:0] and RZCEN to LHPVOL[6:0] and LZCEN
0 = Disable Simultaneous Load
AGND
Rev. PrC | Page 12 of 44 | June 2008
Figure 15
Preliminary Technical Data