Kontron AM4100, Руководство пользователя

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AM4100 Configuration
ID 36126, Rev. 2.0 Page 4 - 9
P R E L I M I N A R Y
4.6 Host CPU Registers
The following registers are special registers which the AM4100 uses to watch and/or configure
the onboard hardware special features and the AMC control signals.
Normally, only the system Firmware uses these registers, but they are documented here for
application use as required.
4.6.1 Memory Configuration Register
The Memory Configuration Register is used to inform the firmware about the memory of the
AM4100.
Note ...
Take care when modifying the contents of these registers as the NetBootLoader
may be relying on the state of the bits under its control.
Table 4-10: Memory Configuration Register
REGISTER NAME MEMORY CONFIGURATION REGISTER
ADDRESS 0xEC00_0002
BIT NAME DESCRIPTION
RESET
VALUE
ACCESS
7 Res Reserved 0 R
6 - 5 MEM_SP DDR2 memory speed:
00 = DDR2 400 MHz
01 = DDR2 528 MHz
10 = DDR2 600 MHz
11 = Reserved
N/A R
4 ECC Error Checking and Correcting:
0 = ECC not enabled
1 = ECC enabled
1 R
3 Res. Reserved 0 R
2 - 1 MEM_SZ Memory chip size:
00 = Chip size 256 Mbit
01 = Chip size 512 Mbit
10 = Chip size 1 Gbit
11 = Chip size 2 Gbit
N/A R
0 MEM_BK Memory bank:
0 = One physical bank is populated
1 = Two physical banks are populated
N/A R