Datasheet

Miscellaneous and GPIO Configuration Registers
9−3
SLLS535E − April 2008 TUSB6250
9.2 PUPDSLCT_P2: GPIO Pullup and Pulldown Resistor Selection Register for Port 2
(XDATA at F08A)
The PUPDSLCT_P2 register allows the MCU to select either the pullup or pulldown resistors on the MCU
port-2 GPIO pins. To turn off both the pullup and pulldown resistors, the MCU must configure the
corresponding bit in the PUPDPWDN_P2 register.
PUSEL[N] means the pullup/pulldown resistor selection for pin P2.N.
76543210
RSV PUSEL6 PUSEL5 PUSEL4 RSV RSV RSV PUSEL0
R/O R/W R/W R/W R/O R/O R/O R/W
BIT
NAME RESET FUNCTION
0 PUSEL0 0 Port-2 GPIO pin P2.0 pullup and pulldown resistor selection by the MCU.
 If the MCU sets this bit to 1, the pullup resistor is selected and the pulldown resistor is
deselected.
 If the MCU clears this bit to 0, the pulldown resistor is selected and the pullup resistor is
deselected.
The power-up default is the pullup resistor disabled and the pulldown resistor enabled for the P2.0
pin.
3−1 RSV 000b Reserved
6−4 PUSEL[N]
(N = 4 to 6)
111 Port-2 GPIO pin P2.4–P2.6 pullup and pulldown resistor selection by the MCU.
 If the MCU sets any of these bits to 1, the corresponding pullup resistor is enabled and the
pulldown resistor is disabled.
 If the MCU clears any of these bits to 0, the corresponding pulldown resistor is enabled and
the pullup resistor is disabled.
The power-up default is the pullup resistor enabled and the pulldown resistor disabled for pins
P2.4–P2.6.
7 RSV 0 Reserved