Interfaces

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7.3

functionality is not supported.

7.4

USB interface

The USB interface is compliant with the USB 2.0 full speed specification. Max throughput on

the USB interface is 12 Mbit/s.

Figure 11 gives an overview of the main components needed for supporting the USB

interface, as specified in the Bluetooth™ Core Specification. For clarity, the serial interface

(including the UART Transport Layer) is also shown.

Figure 11.

USB Interface

The USB device registers and FIFOs are memory mapped. The USB Driver will use these

registers to access the USB interface. The equivalent exists for the HCI communication over

UART.

For transmission to the host, the USB and Serial Drivers interface with the HW via a set of

registers and FIFOs, while in the other direction, the hardware may trigger the Drivers

through a set of interrupts (identified by the RTOS, and directed to the appropriate Driver

routines).

7.5

JTAG interface

The JTAG interface is compliant with the JTAG IEEE Std 1149.1. Its allows both the

boundary scan of the digital pins and the debug of the ARM7TDMI application when

connected with the standard ARM7 development tools.

HCI

USB TRANSPORT LAYER

UART TRANSPORT LAYER

RTOS

STA2416 HW

USB DRIVER

SERIAL DRIVER

UART

DEVICE

REGISTERS

FIFOs

USB

DEVICE

REGISTERS

FIFOs

IRQ

IRQ