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User:Pau pajuelo

637 bytes removed, 13:09, 6 November 2013
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Power, system boot and resets
*'''BOOTMODE''' is used to setup a boot priority sequence. BOOTMODE is equal to #SYS_BOOT4. It has a 100K PU signal.
 
More resources available at [{{#lst:Template:Links|IGEP_COM_AQUILA_ISEE_Hardware}} IGEP COM AQUILA Hardware Reference Manual] section 6.1 and [{{#lst:Template:Links|IGEP_AQUILA_EXPANSION_ISEE_Hardware}} IGEP AQUILA EXPANSION Hardware Reference Manual] section 5.8.
=== BOOTMODE design rules ===
* It is recommendable add a jumper header series with a 100 Ohms resistor in your base board to manage boot priority sequence. For example: If you want to reflash the internal NAND memory from microSD card you will need to unmount the jumper.
* Read the resources detailed above to get more information.
== Resets ==
=== PMIC Resets ===
*'''PMIC_PWR_BTN''': Drive to Low to turn off power supply (long press). Also, this pin can generate interrupts to AM335x from PMIC (short press).
More resources available at [{{#lst:Template:Links|IGEP_COM_AQUILA_ISEE_Hardware}} IGEP COM AQUILA Hardware Reference Manual] section 6.1 and [{{#lst:Template:Links|IGEP_AQUILA_EXPANSION_ISEE_Hardware}} IGEP AQUILA EXPANSION Hardware Reference Manual] section 5.7.
=== AM335x Resets ===
*'''#POR''' (Power on Reset) is a cold Reset used during AM335x power-up and power-down sequence, it is managed by PMIC.
*'''#RESET_IN'''is a warm Reset (also named fast reset).
More resources available at [{{#lst:Template:Links|IGEP_COM_AQUILA_ISEE_Hardware}} IGEP COM AQUILA Hardware Reference Manual] section 6.1 and [http://www.ti.com/litv/pdf/spruh73i AM335x Technical Reference Manual] section 8.1.7.
=== Resets design rules===
* Resets lines are very useful to restart ICs (LDOs, Transceivers, Level shifters, etc.).
* The most priority reset is PMIC_PWR_BTN, so it is important to use at least this one.
* Read the resources detailed above to get more information.
= AM335x peripherals=
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