User Guide

PAMS
UIF Module DU8
NHB–3
Technical Documentation
Original 26/97
Page 5–6
Control Signals
Table 2. Control Signals
Pin / Conn. Line Symbol Minimum Typical /
Nominal
Maximum Unit / Notes
12 / X4 MIC_ENA
Mi E bl
– 0 3 Volts Mic Enabled
Mic_Enable
VA1–0.4 VA1 VA1+3 Volts Mic Disabled
4 / X4 BACKLIGHT
K d LCD li ht
VA1–1.0 – VA1 Volts Lights On
Key and L
C
D light
0 – 2.0 Volts Lights Off
17 / X4 CALL_LED
C ll i di t
VA1–1.0 – VA1 Volts LED On
C
all indicator
0 – 0.4 Volts LED Off
25 / X4 SIMCLK 3.25 /1.625 MHz
26 / X4 SIMRESET
–0.3 0.6 V Low level
4.0 5.0 V High level
27 / X4 VSIM 4.5 4.65 5.5 V
28 / X4 SIMDATA
0.4 V Low level
3.8 4.65 V High level
AC Characteristics
Table 3. Audio Specifications
HPMIC 1 kHz rms NOTES
MRP pressure 2.8 dBPa 5 cm from MIC
MIC pressure –2.2 dBPa about 5 dB attenuation
MIC output 4.9 mV mic sensitivity –64 dB
0 dB = 1V/uBar 1uBar=0.1Pa
Codec gain 35 dB / 275 mV Codec maximum gain
Level – 8.5 dBmO 0 dBmO = 739 mV
HPEAR 1 kHz rms
Level – 6 dBmO / 245 mV 0 dBmO = 490 mV
Codec gain –3 dB 9 dB fixed gain – 12 dB atten.
Codec output 175 mV max. volume 435 mV (+12 dB)
Earpiece pressure 9 dBPa