Hardware Details; Introduction To Cpu; Cpu Features; Clock - Embest SBC8600B Quick Start Manual

3 Hardware Details

3.1 Introduction to CPU

The AM335x microprocessors, based on the ARM Cortex-A8, are enhanced
with image and graphics processing, peripherals, and industrial interface
options such as EtherCAT and PROFIBUS. The device has support for
high-level operating systems such as Linux, WinCE and Android.
The AM335x microprocessor contains these subsystems:
 Microprocessor unit (MPU) subsystem based on the ARM Cortex-A8
microprocessor.
 POWERVR SGX™ Graphics Accelerator subsystem for 3D graphics
acceleration to support display and gaming effects.
 The Programmable Real-Time Unit and Industrial Communication
Subsystem (PRU-ICSS) is separate from the ARM core, allowing
independent operation and clocking for greater efficiency and
flexibility.

3.2 CPU Features

3.2.1 Clock

The AM3359 has two clock inputs, OSC1 and OCC0, and two clock outputs,
LCKOUT1 and LCKOUT2.
OSC1 provides RTC with a 32.768KHz reference clock. And it is used to
connect RTC_XTALIN terminal to RTC_XTALOUT terminal.
OSC0 provides reference clocks such as 19.2-MHz, 24-MHz, 25-MHz or
26-MHz for the clocks without RT function. It is also used to connect the
XTALIN terminal and the XTALOUT terminal.

3.2.2 Reset

Resetting is controlled by PWRONRSTn signals from the CPU. The device is
reset when there is a low level signal.
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