Fbus Interface; Mbus Interface; Jtag & Ostrich Interface; Dai - Nokia RH-9 Series Ccs Technical Documentation

RH-9
System Module & UI

FBUS Interface

FBUS is an asynchronous data bus having separate TX and RX signals. Default bitrate of
the bus is 115.2 kbit/s. FBUS is mainly used for controlling phone in the production.
Signal
FBUS_TX
FBUS_RX
Rise time
GND

MBUS Interface

MBUS interface is used for controlling the phone in R&D and AS. It is bidirectional serial
bus between the phone and PC. MBUS can also be accessed via bottom (headset) con-
nector. In production the phone initialization is made using MBUS. The default transmis-
sion speed is 9.6 kbit/s.
Signal
GND
MBUS
JTAG & Ostrich Interface
JTAG & Ostrich are not supported on the bf4a board.

DAI

Digital Audio Interface (DAI) is used for audio testing. The audio samples are digitally
transferred from DSP through FBUS at speed of 230.4 kbit/s. An 8 kHz synchronizing
clock is needed for proper operation of DAI measurements. Clock signal is connected to
UPP pin GenTest(0).

Test modes (SW dependant)

The phone can be activated in different SW modes by applying specific resistor values
between BSI/Btemp lines and GND. The modes are:
Page 68
Table 35: FBUS interface signals
Min
Voh 0.7*VFLASH1
Vol 0
Vih 0.7*VFLASH1
Vil 0
Tr
Table 36: MBUS interface signals
Min
Vih 1.95V
Vil 0V
Voh 1.95V
Vol 0V
ãNokia Corporation
CCS Technical Documentation
Nom Max
VFLASH1
0.3*VFLASH1
VFLASH1
0.3*VFLASH1
12.5 ns
0
Nom Max
0
2.7V 3.0V
0.2V 0.83V
2.78V 2.83V
0.2V 0.83V
Table 33
Note
for TX and RX signals
Note
bidirectional
Issue 1 11/02