Hot-Plug And Smbus Interface Registers - Renesas IDT 89HPES48H12G2 User Manual

IDT Switch Configuration and Status Registers
GPIOCFG0 - General Purpose I/O Configuration 0 (0x0AA8)
Bit
Field Name
8:0 GPIOCFG
31:9 Reserved
GPIOD0 - General Purpose I/O Data 0 (0x0AB0)
Bit
Field Name
8:0
31:9 Reserved

Hot-Plug and SMBus Interface Registers

HPSIGMAP - Hot-Plug GPIO Signal Map (0x0AB8)
Bit
Field Name
4:0 HP0GPIOPRT
9:5 HP1GPIOPRT
PES48H12G2 User Manual
Field Default
Type
Value
RW 0x0
SWSticky
RW
Field Default
Type
Value
GPIOD RW HWINIT
SWSticky
RW
Field Default
Type
Value
RW 0x1F
SWSticky
RW 0x1F
SWSticky
Description
GPIO Configuration. Each bit in this field controls the correspond-
ing GPIO pin. When a bit is configured as a general purpose I/O
pin and the corresponding bit in this field is set, then the pin is con-
figured as a GPIO output. When a bit is configured as a general
purpose I/O pin and the corresponding bit in this field is cleared,
then the pin is configured as an input. When the pin is configured
as an alternate function, the behavior of the pin is defined by the
alternate function.
Bit x in this field corresponds to GPIO pin x.
Reserved field.
Description
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.
Reserved field.
Description
Hot-Plug GPIO 0 Port Map. This field selects the switch 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.
Hot-Plug GPIO 1 Port Map. This field selects the switch 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.
17 - 17 April 5, 2013