User Guide

NSB-5
System Module PAMS Technical Documentation
Page 48 Nokia Mobile Phones Ltd. Issue 1 03/01
The program execution starts from the BOOT ROM and the MCU investigates in the early
start–up sequence if the flash prommer is connected. This is done by checking the status
of the MBUS–line. Normally this line is high, but when the flash prommer is connected,
the line is forced low by the prommer. The flash prommer serial data receive line is in
receive mode waiting for an acknowledgement from the phone.
The data transmit line from the baseband to the prommer is initially high. When the
baseband has recognized the flash prommer, the FBUS TX–line is pulled low. This
acknowledgement is used to start the data transfer of the first two bytes from the flash
prommer to the baseband on the FBUS RX–line. The data transmission begins by starting
the serial transmission clock (MBUS–line) at the prommer.
The 2.8V programming voltage is supplied inside the transceiver from the CCONT.
For protecting the MAD2WD1 against ESD spikes at the system connector, the data
transmission lines (MBUS, RX and TX) are equipped with EMI filters.
IBI Accessories
All accessories which can be connected between the transceiver and the battery or
which itself contain the battery, are called IBI accessories.
Either the phone or the IBI accessory can turn the other on, but both possibilities are not
allowed in the same accessory.
Phone Power–on by IBI
IBI accessory can power on the phone by pulling the BTEMP line up to 3V.
Table 14: Flash programming, DC connector
Pin Name Parameter Min Typ Max Unit Remarks
1 VIN supply voltage 6.8 7.8 8.8 V supply voltage
2 GND GND 0 0 V supply ground
11 MBUS serial clock from the prommer 2.0
0
2.8
0.8
V prommer detec-
tion and serial
clock for synchro-
nous communica-
tion
12 FBUS_RX serial data from the prommer 2.0v
0v
2.8
0.8
V receive data from
prommer to base-
band
13 FBUS_TX data acknowledge to the prommer 2.0
0.1
2.8
0.8
Vtransmit data
from baseband to
prommer
14 GND GND 0 0 V supply ground