The device has three power modes plus an POR state.
- POR: This is not a power mode. This is a condition in which the voltage at the
PWR pin is less than VPWR min, and all circuits including the AVAO_REF block
in the device are powered off.
- SHUTDOWN: This is the lowest power mode. AVDD, DVDD and CVDD supplies are off. Only a gross regulation at LDOIN
pin is maintained. CVDD pin is will have a similar voltage as the LDOIN
pin through internal circuit in order to support WAKE
detection.
- SLEEP: This is the low power operation mode. Only limited functions are available.
- ACTIVE: This is the full power operation mode. All functions are supported under this state.
The various functions supported under different
power modes are summarized in Table 8-32 and the power state diagram is shown in Figure 8-44.
Table 8-32 Active Functions
Summary
| Functional Block |
SHUTDOWN |
SLEEP |
ACTIVE |
POR |
| Main ADC |
|
|
√ |
This is not a power state. All circuits are off. A
sufficient voltage on VPWR will POR the device and put it to
SHUTDOWN mode |
| AUX ADC |
|
|
√ |
| OV/UV protector |
|
√(1) |
√ |
| UART |
|
|
√ |
| Comm Vertical Communication |
|
|
√ |
| Fault Status and NFAULT Communication |
|
√ |
√ |
| Comm timeout |
|
|
√ |
| SLEEP timeout |
|
√ |
|
| Thermal Shutdown Detection |
|
√ |
√ |
| SPI Master |
|
|
√ |
| OTP programming |
|
|
√ |
| Always-on block to detect POR of the device |
√ |
√ |
√ |
(1) To enable OV/UV protector in SLEEP mode, host must enable the
function(s) in ACTIVE mode first, then put the device to SLEEP.