IDT 89HPES48T12G2, User Manual

Page: 259 / 276

IDT Switch Configuration and Status Registers
PES48T12G2 User Manual 16 - 15 April 5, 2013
GPIOD1 - General Purpose I/O Data 1 (0x0AB4)
Hot-Plug and SMBus Interface Registers
HPSIGMAP - Hot-Plug GPIO Signal Map (0x0AB8)
Bit
Field
Field
Name
Type
Default
Value
Description
21:0 GPIOD RW HWINIT
SWSticky
GPIO Data. Each bit in this field controls the corresponding GPIO
pin. Reading this field returns the current value of each GPIO pin
regardless of GPIO pin mode (i.e., alternate function or GPIO pin).
Writing a value to this field causes the corresponding pins which
are configured as GPIO outputs to change state to the value writ-
ten.
Bit x in this field corresponds to GPIO pin (x+32).
31:22 Reserved RO 0x0 Reserved field.
Bit
Field
Field
Name
Type
Default
Value
Description
4:0 HP0GPIOPRT RW 0x1F
SWSticky
Hot-Plug GPIO 0 Port Map. This field selects the PES48T12G2
port whose hot-plug signals are mapped to GPIO alternate function
HP0 signals.
A value of all ones (i.e., 0x1F) indicates that no port is mapped to
HPx GPIO alternate function signals. When no port is mapped, the
state of the hot-plug input signals is ignored and the state of the
hot-plug output signals is negated.
9:5 HP1GPIOPRT RW 0x1F
SWSticky
Hot-Plug GPIO 1 Port Map. This field selects the PES48T12G2
port whose hot-plug signals are mapped to GPIO alternate function
HP1 signals.
A value of all ones (i.e., 0x1F) indicates that no port is mapped to
HPx GPIO alternate function signals. When no port is mapped, the
state of the hot-plug input signals is ignored and the state of the
hot-plug output signals is negated.
14:10 HP2GPIOPRT RW 0x1F
SWSticky
Hot-Plug GPIO 2 Port Map. This field selects the switch port
whose hot-plug signals are mapped to GPIO alternate function
HP2 signals.
A value of all ones (i.e., 0x1F) indicates that no port is mapped to
HPx GPIO alternate function signals. When no port is mapped, the
state of the hot-plug input signals is ignored and the state of the
hot-plug output signals is negated.
19:15 HP3GPIOPRT RW 0x1F
SWSticky
Hot-Plug GPIO 3 Port Map. This field selects the switch port
whose hot-plug signals are mapped to GPIO alternate function
HP3 signals.
A value of all ones (i.e., 0x1F) indicates that no port is mapped to
HPx GPIO alternate function signals. When no port is mapped, the
state of the hot-plug input signals is ignored and the state of the
hot-plug output signals is negated.