Dave Embedded Systems Axel ULite Hardware Manual page 4

AXEL ULite Hardware Manual
6.2 Variant base peripherals.................................................................................................40
6.2.1 FULL GPIO configuration ...................................................................................... 40
6.3 HMI configuration - use case 1......................................................................................41
6.3.1 LCD controller ........................................................................................................ 41
6.3.2 ECSPI2 .................................................................................................................. 43
6.3.3 I²C2 ........................................................................................................................ 43
6.3.4 KPP ........................................................................................................................ 43
6.3.5 UART1 ................................................................................................................... 44
6.3.6 UART2 ................................................................................................................... 44
6.3.7 UART3 ................................................................................................................... 44
6.3.8 SAI2 ....................................................................................................................... 44
6.4 IoT Gateway - use case 2..............................................................................................45
6.4.1 ENET2 ................................................................................................................... 46
6.4.2 UART1 ................................................................................................................... 46
6.4.3 UART2 - four wires ............................................................................................... 46
6.4.4 UART3 - four wires ............................................................................................... 47
6.4.5 UART4 - for wires ................................................................................................. 47
6.4.6 UART 5 .................................................................................................................. 47
6.4.7 UART 6 .................................................................................................................. 47
6.4.8 UART 7 .................................................................................................................. 48
6.4.9 UART 8 - for wires ................................................................................................ 48
6.4.10 I²C3 ...................................................................................................................... 48
6.4.11 I²C4 ...................................................................................................................... 48
6.4.12 ECSPI2 ................................................................................................................ 48
6.4.13 ECSPI3 ................................................................................................................ 49
6.4.14 MMC/SD/SDIO2 .................................................................................................. 49
6.5 Customized pin muxing configuration.............................................................................50
7 Power, reset and control........................................................................................................51
7.1 Power Supply Unit (PSU) and recommended power-up sequence...............................52
7.1.1 Power-up sequence ............................................................................................... 54
7.2 Reset scheme and control signals..................................................................................55
7.2.1 CPU_PORn ........................................................................................................... 55
7.3 System boot....................................................................................................................56
7.3.1 Boot options ........................................................................................................... 56
7.3.1.1 SPI NOR / SD option .......................................................................................56
7.3.1.2 NAND / SD option ...........................................................................................57
7.4 Clock scheme.................................................................................................................57
7.5 Recovery.........................................................................................................................57
7.5.1 JTAG Recovery ..................................................................................................... 57
7.5.2 USB Recovery ....................................................................................................... 57
7.5.3 SD/MMC Recovery ................................................................................................ 58
7.6 Multiplexing.....................................................................................................................58
8 Operational characteristics....................................................................................................59
v.1.0.2
August, 2019 4/65