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7.4 USB Interface

A USB device interface compliant to USB specification v1.1 is connected to the ARM processor. This al-

lows the chip to be connected to a Universal Serial Bus that can transmit data and/or voice through the

internal USB transceiver.

Figure 5 gives an overview of the main components needed for supporting the USB interface, as specified

port Layer) is also shown.

Figure 5. USB Interface

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

cess the USB interface. The equivalent exists for the HCI communication over UART.

For transmission to the host, the USB & 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 (iden-

tified 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 devel-

opment tools.

7.6 RF Interface

The STLC2415 radio interface is compatible to BlueRF (unidirectional RxMode2 for data and unidirection-

al serial interface for control).

7.7 PCM Voice Interface

The PCM interface is a direct PCM interface to connect to a standard CODEC (e.g. STw5093 or STw5094)

HCI

USB TRANSPORT LAYER

UART TRANSPORT LAYER

RTOS

STLC2415 HW

USB DRIVER

SERIAL DRIVER

UART

DEVICE

REGISTERS

FIFOs

USB

DEVICE

REGISTERS

FIFOs

IRQ

IRQ

D03TL588