u-blox Malmo AB 072002 User Manual
Utfärdare / Issued by
Datum / Date
Beteckning / Ref.
Sida / Page
Mats Andersson
2005-03-30
cBProject-0503-17 (1)
16 (27)
Ärende / Subjekt
Godkänd av / Approved by
WCS Module User Manual
Template update: 00-12-01
3.4 Electrical interface requirements
3.4.1 Overview
CSR BC358239A
Radio & Baseband
Bluetooth IC
Power supply
+1V8
Vin
(2.2V - 4.2V)
RF-connect
Analog
-I/O
Digital-I/O
UART
SPI
RESET-n
Analog
Interface
4
9
5
Optional External
Antenna connector
J3
Internal Antenna
J1
J2
Module Interface
Figure 2 - HW Block Diagram
The Bluetooth unit is based on the Cambridge Silicon Radio Bluecore3 Multimedia chip
(BC358239A). This chip includes a processor (for the Bluetooth stack and application), a DSP (for
handling of the audio encoding/decoding) and the necessary analog to digital and digital to analog
converters.
(BC358239A). This chip includes a processor (for the Bluetooth stack and application), a DSP (for
handling of the audio encoding/decoding) and the necessary analog to digital and digital to analog
converters.
The unit will use 3 inputs and 2 LED ouputss (red + green light) as a user interface with the
functionality described previously. These will be connected in a connector (J1 and j2) and not
mounted on the board. The buttons are directly connected to the CPU.
functionality described previously. These will be connected in a connector (J1 and j2) and not
mounted on the board. The buttons are directly connected to the CPU.
The audio in will come into the system from connected to the connector. There is a possibility for
separate left and right channel sound input.
separate left and right channel sound input.
The audio out will be feed from the system separated into a left and a right channel.
The unit will also have a connector to an 8 bits A/D converter included in the base band circuit that is
used to check the battery voltage.
used to check the battery voltage.
There are 2 connectors available on the unit:
•
30 poles flex film connector with base functionality (J1). The flex film connector pin usage is
designed to be compatible with the generation 1 module wherever possible. Se tables below
for exceptions from this.
designed to be compatible with the generation 1 module wherever possible. Se tables below
for exceptions from this.
•
30 poles Board-to-Board connector mounted on the bottom side of the unit (J2).
3.4.2 Audio Signal Interface
The Audio output signals can has the following behavior:
The Audio output signals can has the following behavior: