User Manual

Bluegiga Proprietary Version 1.0

13 PIO

The Parallel Input Output (PIO) Port is a general-purpose I/O interface to WRAP THOR 2022-1.

The port consists of six programmable, bi-directional I/O lines, PIO[2:7].

Programmable I/O lines can be accessed either via an embedded application running on WRAP

THOR 2022-1 or via private channel or manufacturer-specific HCI commands.

PIO[2]/USB_PULL_UP (1)

This is a multifunction terminal. The function depends on whether WRAP THOR 2022-1 is a USB

or UART capable version. On UART versions, this terminal is a programmable I/O. On USB

versions, it can drive a pull-up resistor on USB_D+. For application using external RAM this

terminal may be programmed for chip select.

PIO[3]/USB_WAKE_UP (1)

This is a multifunction terminal. On UART versions of WRAP THOR 2022-1 this terminal is a

programmable I/O. On USB versions, its function is selected by setting the Persistent Store Key

PSKEY_USB_PIO_WAKEUP (0x2cf) either as a programmable I/O or as a USB_WAKE_UP

function.

PIO[4]/USB_ON (1)

This is a multifunction terminal. On UART versions of WRAP THOR 2022-1 this terminal is a

programmable I/O. On USB versions, the USB_ON function is also selectable (see USB Interface

section 9.6).

PIO[5]/USB_DETACH (1)

This is a multifunction terminal. On UART versions of WRAP THOR 2022-1 this terminal is a

programmable I/O. On USB versions, the USB_DETACH function is also selectable (see USB

Interface section 9.6).

PIO[6]/CLK_REQ

This is multifunction terminal, its function is determined by Persistent Store Keys. Using

PSKEY_CLOCK_REQUEST_ENABLE, (0x246) this terminal can be configured to be low when

WRAP THOR 2022-1 is in deep sleep and high when a clock is required. The clock must be

supplied within 4ms of the rising edge of PIO[6] to avoid losing timing accuracy in certain

Bluetooth operating modes.

PIO[7]

Programmable I/O terminal.

Note:

(1) USB functions can be software mapped to any PIO terminal.