Kontron COMe-bP5020 - Manual (Page 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
RESET 0 0 0 0 0 0 0 0
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 conf igured for Input
1 = GPIO[11..8] is conf igured 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
RESET 0 0 0 0 0 0 0 0
BITFIELD DESCRIPTION
[7..0] GPDAT[7..0] GPDAT[7..0] Data
If GPIO[7..0] is conf igured 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 conf igured 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’