[U-Boot] cant not enter uboot command line

[zs]

when debuging the S3C2416, it could not enter uboot command line, as follows printed information, and then  the there will be with no response when the key pressed.
 
I'm very pleased for your advice!
Thank you!

CPU:   S3C2416 at 400MHz             
mmc0: S
       Fclk = 800MHz, Hclk = 133MHz, Pclk = 66MHz                                               
m
Board: SMDK2416 Mobile DDRalising SD card           
DRAM:    64 MB              
Flash:   0 kBs3c-sdhci.1: 
NAND:    512 MBhsmmc (13333333
*** Warning - bad CRC or NAND, using default environment                                           
sdhci: card 

In:      serialion=0          
Out:     serial        
s3c-sd
Err:     serial clock source 1
Not found the DM9000                    
bs60_init
>>> test
[*]trinityb_init: bs_chip_command(INIT_SYS_RUN)vfat /dev/mmcblk0p1 /mn                        
[*]trinityb_init: bs_chip_wr_reg( 0x0106, 0x0203 ); SDRAM Refresh Clock Configur                                            
[*]loa      
mmcblk0: error -110 tr
ationring 
measure2=7,duration=0                 
sdh
measure2=0,duration=0                 
[*]
[*]set rotate 3
[*]load color bar
[*]disp_full(2, 15);
[*]bs_cmd_wait_disp_ready()
measure2=5,duration=0
measure2=1559,duration=0
nand_read 2200000
trinityb_display_bitmap c0000000
There is no valid bmp file at the given address
Hit any key to stop autoboot:  0
SMDK2416 #
SMDK2416 #
SMDK2416 #
SMDK2416 # U-Boot 1.1.6 (Sep 24 2009 - 10:24:40) for SMDK2416
Unknown command 'U-Boot' - try 'help'
SMDK2416 #
SMDK2416 #
SMDK2416 #
SMDK2416 #
SMDK2416 #
SMDK2416 # CPU:3#    U-Boot 1.1.6 (Sep 24 2009 - 10:24:40) for SMDK241#      CPU
:3#    U-Boot 1.1.6 (Sep 24 2009 - 10:24:40) for SMDK241#      CPU:3#    U-Boot
1.1.6 (Sep 24 2009 - 10:24:40) for SMDK241#      CPU:3#    U-Boot 1.1.6 (Sep 24
2009 - 10:24:40) for SMDK24