User Guide

NHM-8NX
System Module & UI PAMS Technical Documentation
Page 62 ãNokia Corporation Issue 1 05/02
Table 33
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:
NORMAL
• Normal user phone state when phone is powered up normally from power key. In
this state all normal activities are allowed.
• Abnormal behaviour, like testing, tunings, etc. are forbidden.
• All software required for calls, games, etc. will be started.
TEST
• TEST-state is for manufacturing purposes
• ADC-calibration can be done (charging related calibrations), charging is disabled
• Phone can
•Receive and create a call
• Phone can't make a normal
•Display updating, e.g. key press is not shown on the display, battery & field
strength bar are not updated
•Ringing tone, e.g. when receiving a call ringing tone is not allowed
•Warning tones, e.g. when illegal key combination is pressed or battery level
goes too low, no warning tone can be generated
• TEST state is entered automatically from POWER-OFF if test battery is connected
LOCAL
MBUS Vih 1.95V 2.7V 3.0V bidirectional
Vil 0V 0.2V 0.83V
Voh 1.95V 2.78V 2.83V
Vol 0V 0.2V 0.83V