AS3525-A/-B C22O22
Data Sheet, Confidential
7.4.3.8 Register Description
Table 103 System Register
Name
Base
Default
0x21
System
I2C audio master
System Settings Register
This register is reset at a DVDD-POR.
Offset: 0x20
Bit
Bit Name
Default
Access
Bit Description
7:4
Version <3:0>
0010
R
AFE number to identify the design version
0010: revision 2
3
2
1
0
PVDDp
0
0
0
1
R/W
R/W
R/W
R/W
PVDD trimming:
0: Vnom
1: Vnom *17/18
IOVDD trimming:
0: IOVDD = 3.11V (nominal)
1: IOVDD = 2.94V
0: forced power down through watchdog is disabled
1: forced power down through watchdog is enabled (no serial
interface reading within 1s)
0: power up hold is cleared and supply is switched off
1: set to on after power on
IOVDDp
EnWDogPwdn
PwrUpHld
Table 104 USB_UTIL Register
Name
Base
Default
0x00
USB_UTIL
I2C audio master
USB Utility Register
This register is reset at a DVDD-POR.
Offset: 0x17
Bit
Bit Name
LDO6_on
Default
000
0
Access
Bit Description
7..5
4
n/a
R/W
0: UVDD generation disabled
1: LDO6 for generating UVDD enabled.
3:2
COMP_TH<1:0>
0
R/W
Sets the threshold for the VBUS comparator
00: 4.5V
01: 3.18V
10: 1.5V
11: 0.6V
1
0
SKIP_ENAB
CP_5V_on
0
0
R/W
R/W
0: normal operation
1: enables the skip mode for the VBUS 1:2 charge pump. This
is increasing the efficiency for smaller loads, but increasing
the VBUS ripple.
0: disables VBUS charge pump
1: enables VBUS charge pump
© 2005-2009, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com Revision 1.13
125 - 194
AMSCO [ AMS(艾迈斯) ]
