User Guide

CC Technical Documentation System Module
NPM-10 (3595)
Issue 2 03/2004 ©2004 Nokia Corporation Confidential Page 9
MIDI
Table 8: Internal Speaker (Differential Output EARP and EARN)
Signal Min Nom Max Condition Note
Output voltage swing 4.0 -
-
Vpp Differential
output
Load Resistance (EARP to EARN) 26 32
-
W
Load Capacitance (EARP to EARN) - - 50 nF
Table 9: Connections between UPP and LM4890
Signal From To Parameter Min Max Unit Notes
Shutdown GENIO[14] Shutdown Vih
Vil
1.2
-
-
0.4
V
V
LM4890 detections
thresholds levels
Table 10: Connections between UEM/Battery and LM4890
Signal
Name
From To Parameter Min Max Unti Notes
XAUDIO[1]
Filtered signal
UEM, HF No
direct connection
between UEM and
LM4890
LM4890 Output Swing 1.0 - Vpp With 60 dB
signal to total
distortion ratio
VBAT Battery LM4890 Supply 3.1 4.2 V Lower limit is
SW cut-off