Production Data
WM8580
Figure 35 Typical Power up Sequence where DVDD is Powered before AVDD
Figure 36 Typical Power up Sequence where AVDD is Powered before DVDD
SYMBOL
Vpora
MIN
0.5
0.5
1.0
0.6
TYP
0.7
0.7
1.4
0.8
MAX
1.0
UNIT
V
V
V
V
Vporr
1.1
Vpora_off
Vpord_off
2.0
1.0
Table 68 Typical POR Operation
In a real application, the designer is unlikely to have control of the relative power up sequence of
AVDD and DVDD. Using the POR circuit to monitor VMID ensures a reasonable delay between
applying power to the device and Device Ready.
PD Rev 4.3 August 2007
71
w