STLC2415 STMicroelectronics, STLC2415 Datasheet - Page 19

• Manufacturer Part Number: STLC2415
• Description: Bluetooth Class I 1.8V 0.721Mbps 120-Pin LFBGA
• Manufacturer: STMicroelectronics

Specifications of STLC2415

• Package: 120LFBGA
• Power Class: Class I
• Maximum Data Rate: 0.721 Mbps
• Operating Supply Voltage: 1.8 V
• Lead Free Status / Rohs Status: Supplier Unconfirmed

9
The USB Transport Layer has been specified by the Bluetooth
munication between a host controller (STLC2415) and a host (e.g. PC), via a USB interface. The USB
Transport Layer is completely implemented in SW. It accepts HCI messages from the HCI Layer, prepares
it for transmission over a USB bus, and sends it to the USB Driver. It reassembles the HCI messages from
USB data received from the USB Driver, and sends these messages to the HCI Layer. The Transport Lay-
er does not interprete the contents (payload) of the HCI messages; it only examines the header.
10 POWER CLASS1 SUPPORT
The chip can control an external power amplifier (PA). Several signals are duplicated on GPIOs for this
purpose in order to avoid digital/analog noise loops in the radio.
The Class1_En register enables the alternate functions of GPIO[15:6] to generate the signals for driving
an external PA in a Bluetooth
Every bit enables a dedicated signal on a GPIO pin, as described in table 12.
Table 12. Power Class 1 Functionality
rx_on is the same as the rx_on output pin. Not rx_on is the inverted signal, in order to save components
on the application board.
PA7 to PA0 are the power amplifier control lines. They are managed, on a connection basis, by the base-
band core. The Power Level programmed for a certain Bluetooth
as specified in the Bluetooth
rxon
not rxon
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
Class1_En bit
HCI USB TRANSPORT LAYER
gpio[6]
gpio[7]
gpio[8]
gpio[9]
gpio[10]
gpio[11]
gpio[12]
gpio[13]
gpio[14]
gpio[15]
involved GPIO
®
®
SIG spec.
power class1 application.
outputs a copy of rx_on pin to switch LNA/RF switch on/off
outputs an inverted copy of rx_on pin to switch LNA/RF switch on/off
Bit 0 of the PA value for the current connection
Bit 1 of the PA value for the current connection
Bit 2 of the PA value for the current connection
Bit 3 of the PA value for the current connection
Bit 4 of the PA value for the current connection
Bit 5 of the PA value for the current connection
Bit 6 of the PA value for the current connection
Bit 7 of the PA value for the current connection
description (when class1_En bit = ‘1’)
®
SIG (Part H:2), and allows HCI level com-
®
connection is manged by the firmware,
STLC2415
19/22