Emerson PMPPC7448 Manual De Usuario

 Basic Operation

PmPPC7448 User’s Manual

Figure 11-1:

The PmPPC7448 monitor performs various configuration tasks upon power-up or reset. 
This section describes the monitor operation during initialization of the PmPPC7448 board. 
The flowchart (see 

) illustrates the power-up and global reset sequence (bold text 

indicates environment variables).

The PmPPC7448 monitor follows the boot sequence in 

 before auto-booting the 

operating system or application software. At power-up or board reset, the monitor per-
forms hardware initialization, diagnostic routines, autoboot procedures, free memory ini-
tialization, and if necessary, invokes the command-line. Note that the U-Boot monitor has 
the ability to timeout while waiting for EREADY. See 

 for default configuration set-

tings.

Prior to the console port being available, the monitor will display a four-bit hexadecimal 
value on LED1 through LED4 to indicate the power-up status. In the event of a specific ini-
tialization error, the LED pattern will be displayed and the board initialization will halt. Refer 
to 

 for the LED pattern at the various initialization steps.

Hardware initialization

Monitor command prompt

U-Boot 0.4.0 (Jul 30 2007 - 10:57:37)1.8

CPU:   MPC7448 v2.1 @ 1399.999 MHz

Board: PM/PPC-7448

BusHz: 133333333

I2C:   ready

DRAM:  DDR SDRAM in slot 0 DDR SDRAM in slot 1 ECC (Clearing..)

2048 MB

FLASH: [32MB@e8000000] 32 MB

PCI:   Bus Host

Waiting For EREADY ('q' to exit w/o enum).

Diags Mem:             PASSED

Diags I2C:             PASSED

Diags Flash:           PASSED

Ser#:  1264

Mon:   Resides 0x80000000 - 0x7ff2d9c0

BtDev: Socketed Flash

DCach: on (WriteThrough)

ICach: on

L2Che: on (WriteThrough)

Net:   portdbg, porta, portb

Hit any key to stop autoboot:  0

PM/PPC-7448(1.8)=>