Texas Instruments Jacinto7 J721E User Manual

www.ti.com J721E EVM Hardware Architecture
41
SPRUIS4A–December 2019–Revised May 2020
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Jacinto7 J721E/DRA829/TDA4VM Evaluation Module (EVM)
4.7.1 Processor’s Primary Clock
There are three external crystals attached to the J721E processor to provide the SoC’s Primary clocks
WKUP_LFOSC (32 KHz), WKUP_OSC0 (19.2 MHz) and OSC1 (22.5792 MHz) as shown in Figure 24.
Figure 24. J721E SoC Primary Clock
The WKUP_OSC0 is required by the processor. Both WKUP_LFOSC and OSC1 are optional clocks (not
required for J721E processing). The WKUP_LFOSC can be sourced either on the on-board crystal or from
the PMIC. The OSC1 can be sourced from either the on-board crystal or from clock generator
(CDCEL937) on the Common Processor board.

Texas Instruments Jacinto7 J721E Specifications

General

Brand	Texas Instruments
Model	Jacinto7 J721E
Category	Motherboard
Language	English