Kontron COMe-bP5020 Manual de usuario descargar pdf (Pagina 36)

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User Guide

COMe-bP5020

3.4 Board Control and Status Registers

The following registers are special registers which the COMe-bP5020 uses to monitor and control the onboard hardware special

features.

Table 16: Address: 0x003 - GPIO Direction Register 0 (GPDIR0)

Table 17: Address: 0x004 - GPIO Direction Register 1 (GPDIR1)

Table 18: Address: 0x005 - GPIO Data Register 0 (GPDAT0)

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.

BIT 7 6 5 4 3 2 1 0

NAME DIR7 DIR6 DIR5 DIR4 DIR3 DIR3 DIR1 DIR0

ACCESS R/W R/W R/W R/W R/W R/W R/W R/W

RESET00000000

BITFIELD DESCRIPTION

[7..0] DIR[7..0] GPIO[7..0] Direction

0 = GPIO[7..0] is configured for Input

1 = GPIO[7..0] is configured for Output

BIT 7 6 5 4 3 2 1 0

NAME reserved DIR11 DIR10 DIR9 DIR8

ACCESS R R/W R/W R/W R/W

RESET 0000 0 0 0 0

BITFIELD DESCRIPTION

[3..0] DIR[11..8] GPIO[11..8] Direction

0 = GPIO[11..8] is configured for Input

1 = GPIO[11..8] is configured for Output

BIT 7 6 5 4 3 2 1 0

NAME GPDAT7 GPDAT6 GPDAT5 GPDAT4 GPDAT3 GPDAT2 GPDAT1 GPDAT0

ACCESS R/W R/W R/W R/W R/W R/W R/W R/W

RESET00000000

BITFIELD DESCRIPTION

[7..0] GPDAT[7..0] GPDAT[7..0] Data

If GPIO[7..0] is configured for INPUT:

0 = GPDAT[7..0] indicates that the signal GPIO[7..0] is at a ‘low’ level

1 = GPDAT[7..0] indicates that the signal GPIO[7..0] is at a ‘high’ level

If GPIO[7..0] is configured for OUTPUT:

0 = GPDAT[7..0] indicates that the signal GPIO[7..0] is being driven ‘low’

1 = GPDAT[7..0] indicates that the signal GPIO[7..0] is being driven ‘high’

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Kontron COMe-bP5020 Manual de usuario Pagina 36