Kontron COMe-cP2020 Manuale Utente Scaricare il pdf (Pagina 43)

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COMe-P2020 User Guide

3.4 Board Control and Status Registers

The following registers are special registers which the COMe-cP2020 uses to monitor and control the onboard hardware

special features.

N O T I C E

Take care when modifying the contents of these registers as the system may be relying on the state of

the bits under its control.

Table 3-4: 0x000: User Boot ROM Location Configuration Register

ACTION D7 D6 D5 D4 D3 D2 D1 D0

READ NU NU NU NU cfg_rom_loc[0:3]

WRITENUNUNUNU cfg_rom_loc[0:3]

POWER UP11111111

BITFIELD DESCRIPTION

[D3-D0] 0000 PCI Express 1

0001 PCI Express 1

0010 Serial RapidIO 1

0011 Serial RapidIO 2

0100 DDR Controller

0101 PCI Express 3

0110 On-chip boot ROM-SPI configuration

0111 On-chip boot ROM-eSDHC configuration

1000 Local bus FCM-8-bit NAND flash small page

1001 Reserved

1010 Local bus FCM-8-bit NAND flash large page

1011 Reserved

1100 Reserved

1101 Local bus GPCM-8-bit

1110 Local bus GPCM-16-bit ROM

1111 Local bus GPCM-16-bit ROM (default)

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 105 106

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Kontron COMe-cP2020 Manuale Utente Pagina 43