SWRU612 December 2023 CC3300 , CC3301 , CC3351
There are two power rails that must be routed to the CC33xx devices:
The CC33xx device has internal LDO's for regulating the digital core, memory, and power amplifier supplies. The output of the LDO can be measured from DIG_LDO_OUT and PA_LDO_OUT. Please note that the output of PA_LDO_OUT is not enabled until firmware has been loaded onto the device.
For further information on the operating conditions for the supply pins, see Table 2-2.
Pin | Signal | Dir (I/O) | Required Voltage (Typical) |
---|---|---|---|
1 | PA_LDO_OUT | O | N/A |
31 | DIG_LDO_OUT | O | N/A |
17 | VIO | I/O | 1.8V |
32 | VDD_MAIN_IN | I | 1.8V |
4 | VDDA_IN1 | I | 1.8V |
5 | VDDA_IN2 | I | 1.8V |
35 | VPP_IN | I | 1.8V |
39 and 40 | PA_LDO_IN | I | 3.3V |