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2 . 5 F l a s h M e m o r y
The AM4024(E) provides flash interfaces for the uEFI BIOS and the SATA Flash module.
2.5.1 SPI Boot Flash for uEFI BIOS
The AM4024(E) provides two 16 MB SPI boot flashes for two separate uEFI BIOS images, a standard SPI
boot flash and a recovery SPI boot flash. The fail-over mechanism for the uEFI BIOS recovery can be
controlled via the DIP switch SW2, switch 2. The SPI boot flash includes hardware write protection func-
tionality, which can be configured via the uEFI BIOS. If write protection is enabled, the SPI boot flash
cannot be written to.
Note:
The uEFI BIOS code and settings are stored in the SPI boot flashes. Changes made to the
uEFI BIOS settings are available only in the currently selected SPI boot flash. Thus, switch-
ing over to the other SPI boot flash may result in operation with different uEFI BIOS code
and settings.
2.5.2 SATA Flash Module
The AM4024(E) supports up to 64 GB flash memory as an optional SATA Flash module. The SATA Flash
module uses the J7 connector for interfacing with the AM4024(E). If this module is required, the J7
interface is not available for the The RTC Backup Battery module. Refer to Chapter 6 for further infor-
mation on this module.
2 . 6 Tr u s te d P l a t fo r m M o d u l e 1. 2
The AM4024(E) supports the Trusted Platform Module (TPM) 1.2. TPM1.2 is a security chip specifically
designed to provide enhanced hardware- and software-based data and system security. TPM1.2 is
based on the Atmel AT97SC3204 security controller and stores sensitive data such as encryption and
signature keys, certificates and passwords, and is able to withstand software attacks to protect the
stored information.
2 . 7 B o a r d I n te r fa c e s
2.7.1 Front Panel LEDs
The AM4024(E) is equipped with three Module Management LEDs and four User-Specific LEDs. The User-
Specific LEDs can be configured via two onboard registers (see Chapter 3.3.7, LED Configuration Regis-
ter, and Chapter 3.3.8, LED Control Register).
2.7.1.1
Module Management LEDs and Hot Swap LED
The Module Management LEDs (LED0 and LED1) show the software status of the MMC. The Hot Swap LED
(HS LED) indicates when the board may be extracted. It can be switched on or off by software and may
be used, for example, to indicate that the shutdown process is finished and the board is ready for ex-
traction.
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User Guide
AM4024(E)
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