WM8350GEB/V Wolfson Microelectronics, WM8350GEB/V Datasheet - Page 116

• Manufacturer Part Number: WM8350GEB/V
• Description: Audio CODECs Audio CODEC plus pwr management
• Manufacturer: Wolfson Microelectronics

Specifications of WM8350GEB/V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8350
w
Table 62 Start-Up Control in Development Mode
Note: if the WM8350 enters the BACKUP state as a result of an undervoltage condition (see
Section 18), then the control registers will be reset, but DO_CONF will remain high. When the supply
voltage rises and device comes out of BACKUP, the DO_CONF output will still be high. If the
DO_CONF signal is used to trigger an external ‘genie’ device, then this may not work, as the
DO_CONF has remained high through the BACKUP state transition, and the WM8350 device will
become locked in the PRE-ACTIVE state when an ON event occurs.
This problem may be avoided by ensuring that the ‘genie’ monitors the LINE voltage in order to
recognise the undervoltage condition, and that it verifies the I2C Acknowledge signal on the
secondary interface (GPIO10 and GPIO11) to determine whether it can execute its programming
function.
R6 (06h)
Interface
Control
ADDRESS
BIT
12
11
CONFIG_D
ONE
RECONFIG
_AT_ON
LABEL
DEFAULT
0
1
Tells the system that the PIC micro has
completed its programming.
0 = Programming still to be done
1 = Programming complete
Only applies when CONFIG pins[1:0] = 00.
Selects whether to reset the registers in the
OFF state and whether to reload the device
configuration from the PIC when an ON
event occurs.
0 = Do not reset registers in the OFF state.
Do not load configuration data when an ON
event occurs.
1 = Reset registers in the OFF state. Load
configuration from the PIC when an ON
event occurs.
Note that, in development mode, the device
configuration from the PIC is always loaded
when first powering up the chip.
This bit must always be set to default (1) in
Custom Modes 01, 10 and 11.
DESCRIPTION
PD, March 2010, Rev 4.2
Production Data
116