The following steps should be followed for
device initialization.
- Apply AVDD and IOVDD (no specific sequence required). After AVDD is
applied, the internal reference powers up and settles in approximately 2ms.
- Configure the CTRL pin and apply the sampling clock.
- Apply a hardware reset. After the hardware reset is released, the
default registers are loaded from internal fuses and the internal power up calibration is
initiated. The calibration takes approximately 200000 clock cycles.
- Begin programming via the SPI.
Table 8-2 Power Up Timing
|
Minimum
Time |
Unit |
t1 |
Delay from power up to logic level of CTRL
pin |
2 |
ms |
t2 |
RESET pulse width |
1 |
µs |
t3 |
Delay from RESET disable to
SEN active |
~ 200000 |
Clock Cycles |