3.9 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.9.1 Energy Management Unit (EMU) . . . . . . . . . . . . . . . . . . . . . .17
3.9.2 Voltage Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.9.3 DC-DC Converter . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.9.4 Power Domains . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
3.10 Reset Management Unit (RMU) . . . . . . . . . . . . . . . . . . . . . . . .18
3.11 Core and Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.11.1 Processor Core . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.11.2 Memory System Controller (MSC) . . . . . . . . . . . . . . . . . . . . .19
3.11.3 Linked Direct Memory Access Controller (LDMA) . . . . . . . . . . . . . . . .19
3.12 Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.13 Configuration Summary . . . . . . . . . . . . . . . . . . . . . . . . . .21
4. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.2 Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . .23
4.3 General Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . .24
4.4 DC-DC Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.5 Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.6 Current Consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . .28
4.6.1 MCU current consumption using DC-DC at 3.6 V input . . . . . . . . . . . . . . .28
4.6.2 MCU current consumption at 3.6 V . . . . . . . . . . . . . . . . . . . . . .30
4.6.3 MCU current consumption at 3.3 V . . . . . . . . . . . . . . . . . . . . . .33
4.6.4 Radio current consumption with DC-DC at 3.3 V input . . . . . . . . . . . . . . .36
4.6.5 SUN O-QPSK radio current consumption with DC-DC at 3.3 V input . . . . . . . . . .37
4.6.6 SUN OFDM radio current consumption with DC-DC at 3.6 V input . . . . . . . . . . .38
4.7 Energy Mode Wake-up and Entry Time. . . . . . . . . . . . . . . . . . . . . .40
4.8 Flash Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
4.9 Sub-GHz RF Transceiver Characteristics . . . . . . . . . . . . . . . . . . . . .42
4.9.1 RF Constant Envelope Transmitter Characteristics . . . . . . . . . . . . . . . .42
4.9.2 RF SUN OFDM Transmitter Characteristics . . . . . . . . . . . . . . . . . . .50
4.9.3 RF Proprietary Receiver Characteristics . . . . . . . . . . . . . . . . . . . .72
4.9.4 RF SUN O-QPSK Receiver Characteristics . . . . . . . . . . . . . . . . . . .81
4.9.5 RF Wi-SUN FSK Receiver Characteristics . . . . . . . . . . . . . . . . . . .85
4.9.6 RF SUN OFDM Receiver Characteristics. . . . . . . . . . . . . . . . . . . .97
4.10 Oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
4.10.1 High Frequency Crystal Oscillator. . . . . . . . . . . . . . . . . . . . . 112
4.10.2 Low Frequency Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . 113
4.10.3 High Frequency RC Oscillator (HFRCO)
4.10.4 Fast Start_Up RC Oscillator (FSRCO)
. . . . . . . . . . . . . . . . . 1. 14
. . . . . . . . . . . . . . . . . . .115
4.10.5 Low Frequency RC Oscillator (LFRCO) . . . . . . . . . . . . . . . . . . . 116
4.10.6 Ultra Low Frequency RC Oscillator . . . . . . . . . . . . . . . . . . . .116
4.11 GPIO Pins (3V GPIO pins) . . . . . . . . . . . . . . . . . . . . . . . 1.17
4.12 Analog to Digital Converter (IADC) . . . . . . . . . . . . . . . . . . . . . . 119
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