LPD-SOM-CLIP1 Logic, LPD-SOM-CLIP1 Datasheet - Page 18

• Manufacturer Part Number: LPD-SOM-CLIP1
• Description: CLIP RETENTION PLATE
• Manufacturer: Logic

Specifications of LPD-SOM-CLIP1

• Accessory Type: Retention Clip
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: SOM-M1
• Other names: 460-3502

5
5.1
5.2
5.2.1
5.2.2
PN 1013755 Rev 5
System Integration
Custom Configuration
The OMAP-L138
design and budget requirements. As a result, this
systems, flexible mDDR and SPI flash memory footprints, and other hardware configurations. If
your application needs require unique hardware or software configurations, please contact Logic
Sales about custom SOMs available in production volumes: [e-mail].
Resets
The OMAP-L138
External devices use MSTR_nRST to assert reset to the product. The OMAP-L138
RESETOUTn to indicate to other devices that the SOM is in reset.
Master Reset (MSTR_nRST)—Reset Input
Logic suggests that custom designs implementing the OMAP-L138
MSTR_nRST signal as the “pin-hole” reset used in commercial embedded systems. The
MSTR_nRST triggers a power-on-reset event to the OMAP-L138 processor and resets the entire
CPU.
IMPORTANT NOTE: Any custom reset circuit design should guard the assertion of the reset lines
during a low power state so as to prevent power-up in a low or bad power condition. (Powering up
in a low or bad power condition will cause data corruption and, possibly, temporary system
lockup). See the “Power Management” section of this document for further details. A low pulse on
the MSTR_nRST signal will cause a system-wide reset.
Low Pulse on MSTR_nRST Signal:
A low pulse on the MSTR_nRST signal, asserted by an external source (for example, the reset
button on the custom design application) will bring MSTR_nRST low until the assertion source is
de-asserted. There is no delay beyond the de-assertion of the external MSTR_nRST signal
source, so the custom design must ensure that the assertion time is sufficient for all related
peripherals.
Logic suggests that for any external assertion source that triggers the MSTR_nRST signal,
analog or digital, de-bouncing should be used to generate a clean, one-shot reset signal.
SOM Reset (RESETOUTn)—Reset output
All hardware peripherals should connect their hardware-reset pin to the RESETOUTn signal on
the expansion connector. Internally, all OMAP-L138
connected to the RESET_nOUT net.
If the output of the onboard voltage-monitoring circuit is asserted (active low), the user can expect
to lose information stored in RAM. The data loss occurs because the CPU is reset to its reset
defaults.
Logic Product Development Company, All Rights Reserved
SOM-M1
SOM-M1
PRELIMINARY DOCUMENT—SUBJECT TO CHANGE
has a reset input (MSTR_nRST) and a reset output (RESETOUTn).
was designed to meet multiple applications for users with specific
SOM
SOM-M1
OMAP-L138 SOM-M1 Hardware Specification
supports a variety of embedded operating
peripheral hardware reset pins are
SOM-M1
use the
SOM-M1
uses
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