ML865G1 HW Design Guide
1VV0301632 Rev. 4 Page 6 of 86 2020-09-23
Pin Layout .................................................................................... 23
4. POWER SUPPLY ........................................................................ 24
Power Supply Requirements ........................................................ 24
Power Consumption ..................................................................... 25
4.2.1. Idle mode ...................................................................................... 25
4.2.2. ML865G1-WW Connected Mode ................................................. 27
General Design Rules .................................................................. 28
4.3.1. Electrical Design Guidelines ......................................................... 28
4.3.1.1. +5V Source Power Supply Design Guidelines ............................. 28
4.3.1.2. +12V Source Power Supply Design Guidelines ........................... 29
4.3.1.3. Battery Source Power Supply Design Guidelines ........................ 29
4.3.2. Thermal Design Guidelines .......................................................... 30
4.3.3. Power Supply PCB layout Guidelines .......................................... 31
RTC supply ................................................................................... 32
VAUX Power Output ..................................................................... 32
5. DIGITAL SECTION ...................................................................... 34
Logic Levels ................................................................................. 34
Power On ..................................................................................... 35
Auto Power On ............................................................................. 38
Power Off ..................................................................................... 38
Unconditional Shutdown ............................................................... 40
Wake from deep sleep mode ....................................................... 43
Fast power down .......................................................................... 43
5.7.1. Fast Shut Down by Hardware....................................................... 44
5.7.2. Fast Shut Down by Software ........................................................ 45
Communication ports ................................................................... 45
5.8.1. USB 2.0 HS .................................................................................. 45
5.8.2. SPI ................................................................................................ 47
5.8.3. SPI Connections ........................................................................... 48
5.8.4. Serial Ports ................................................................................... 48
5.8.4.1. Modem serial port 1 (USIF0) ........................................................ 48
5.8.4.2. Modem serial port 2 (USIF1) ........................................................ 50
5.8.4.3. RS232 level translation ................................................................ 51
General purpose I/O ..................................................................... 52
5.9.1. Using a GPIO as INPUT ............................................................... 53
5.9.2. Using a GPIO as OUTPUT ........................................................... 54
5.9.3. Indication of network service availability....................................... 54
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