User Guide

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The interface between BRF 6150 and Nokia BB assumes that all higher layers above the HCI (host controller

interface) are implemented in Nokia BB and all other layers (BB, Link Manager, Link Control, and component

RF) below the HCI are implemented in BRF 6150.

Clock signals

BRF 6150 requires a system clock, which it uses to derive all its internal timing. The clock may be sinusoidal

or square and the frequency tolerance is +/-20 ppm. The external TCXO clock oscillator is used for the system

clock with a sinusoidal output.

SD card

SD card is supplied with 3V supply voltage. The detection of SD card removal/insertion is done by a switch in

the card connector.

Removing SD card while writing to card may corrupt data in SD card. Switch is directly connected to host and

it gives an interrupt to the SW while the status of the switch is changed.

User interface

Display interface

Display features:

• Up to 16M colors within 352 x 416 pixels

• Partial display function Power saving by pausing display process on part of the screen.

The display has two different operating modes:

1 Normal mode, Full screen, up to 16M colours

2 Partial mode, 260k colors but only part of the display is active with 8 colours

The display module does not require any tunings in service.

Keyboard

Joystick

The joystick has one dome for select and four springs for directions. When any direction is selected there are

always select and two direction switches connected.

Flip Keyboard

So called T9 keyboard and left side of qwerty keyboard are implemented in flip. VBAT is supplied to flip via

load switch.

Data between the flip and engine is transferred thru I2C interface. Three coaxial cables are used in flip

engine connection.

Flip Keyboard Interface Signal Description

Table 15 Flip keyboard interface signals

Pin Signal I/O Engine connection Notes

1 Flip Vcc <- LOAD SWITCH VBAT after load

switch

2 Flip data <-> Application

processor

scl I2C data

RM-10;RM-24

System Module Nokia Customer Care

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