User Guide

Nokia Customer Care Baseband Description and Troubleshooting
6255/6255i6256/6256i (RM-19)
Issue 2 05/2005 ©2005 Nokia Corporation Company Confidential Page 29
DC Measurements
Note: H stands for high signal level and L for low signal level.
AC Measurements
Note: DaClk frequency will not exceed ExtClk/2
Table 7: Power Supply Characteristics
Signal Name
Measured
Value (V)
Min Typical Max Unit Description
VIO 1.8 1.7 1.8 1.9 V Control line
VANA (Vflash2) 2.79 2.7 2.78 2.9 V Analogue supply
VDIG 1.79 1.7 1.8 1.9 V Digital supply
GND 0 0 V System GND
Table 8: DC Characteristics
Signal Name
Measured
Value (V)
Min Typical Max Unit Description
CSX H = 1.80
L = 2.0m
H = 0.7xVIO
L = 0
H = VIO
L: 0.3xVIO
V Camera chip select
(active low)
DaClk H = 1.77
L = -18m
H = 0.7xVIO
L = 0
H= VIO
L= 0.3xVIO
V Voltage levels
TxDa H = 1.75
L = -18m
H = 0.8xVIO
L = 0
H = VIO
L = 0.2xVIO
V Data to transmit,
camera interrupt
(active low)
RxDa H = 1.76
L = -11m
H = 0.7xVIO
L = 0
H = VIO
L = 0.3xVIO
V Data to receive
ExtClk H = 1.75
L = -12m
0.5Vp-p 1Vp-p VIOp-p V All modes
VCtrl N/A H = 0.7xVIO
L = 0
H = VIO
L = 0.3xVIO
V Logic 0: shutdown
Table 9: AC Measurement Characteristics
Signal Name
Measured
Value (V)
Min Typical Max Unit Description
DaCLK F = 4.799 4.69 4.8 4.81 MHz Frequency
D = 49.4 45/55 50/50 55/45 % Duty cycle
ExtClk F = 9.6 9.59 9.6 9.69 MHz External system clock
(mode 4)
D = 49.3 45/55 50/50 45/55 %