Texas Instruments AM335 Series Technical Reference Manual

www.ti.com GPMC
7.1.3.3.1 GPMC Clock Configuration
Table 7-6 describes the GPMC clocks.
Table 7-6. GPMC Clocks
Signal I/O Description
GPMC_FCLK I Functional and interface clock
GPMC_CLK O External clock provided to synchronous external memory devices.
The GPMC_CLK is generated by the GPMC from the internal GPMC_FCLK clock. The source of the
GPMC_FCLK is described in Table 7-3. The GPMC_CLK is configured via the GPMC_CONFIG1_i[1-0]
GPMCFCLKDIVIDER field (for i = 0 to 3) as shown in Table 7-7.
Table 7-7. GPMC_CONFIG1_i Configuration
GPMC_CONFIG1_i[1-0] GPMC_CLK Generated Clock
Source Clock
GPMCFCLKDIVIDER Provided to External Memory Device
00 GPMC_FCLK
01 GPMC_FCLK/2
GPMC_FCLK
10 GPMC_FCLK/3
11 GPMC_FCLK/4
7.1.3.3.2 GPMC Software Reset
The GPMC can be reset by software through the GPMC_SYSCONFIG[1] SOFTRESET bit. Setting the bit
to 1 enables an active software reset that is functionally equivalent to a hardware reset. Hardware and
software resets initialize all GPMC registers and the finite state-machine (FSM) immediately and
unconditionally. The GPMC_SYSSTATUS[0] RESETDONE bit indicates that the software reset is
complete when its value is 1. The software must ensure that the software reset completes before doing
GPMC operations.
7.1.3.3.3 GPMC Power Management
GPMC power is supplied by the CORE power domain, and GPMC power management complies with
system power-management guidelines. Table 7-8 describes power-management features available for the
GPMC module.
Table 7-8. GPMC Local Power Management Features
Feature Registers Description
GPMC_SYSCONFIG[0] This bit allows a local power optimization inside the module, by
Clock Auto Gating
AUTOIDLE] bit gating the GPMC_FCLK clock upon the internal activity.
GPMC_SYSCONFIG[4-3]
Slave Idle Modes Force-idle, No-idle and Smart-idle wakeup modes are available
SIDLEMODE bit field
Clock Activity N/A Feature not available
Master Standby Modes N/A Feature not available
Global Wake-up Enable N/A Feature not available
Wake-up Sources Enable N/A Feature not available
261
SPRUH73H–October 2011–Revised April 2013 Memory Subsystem
Submit Documentation Feedback
Copyright © 2011–2013, Texas Instruments Incorporated

Texas Instruments AM335 Series Specifications

General

Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English