Alert Loudspeaker Port - Motorola G24 Developer's Manual

Alert Loudspeaker Port

The alert loudspeaker is the default G24 power-up ringer. It is used for, but not limited to,
sounding the G24 alerts, melodies, and rings. It is located at pins 63 and 65 on the G24 interface
connector, named ALRT_N and ALRT_P respectively.
It is designed with an internal amplifier supplied directly from VCC, which supplies 0.5W to the
audio device. It may also be used as a single-ended output referenced to the G24 analog ground.
Figure 2-21
specifications.
Figure 2-21: Differential Loudspeaker Circuit
Important:
Figure 2-22: SIngle-ended Loudspeaker Circuit
January 1, 2006
shows the alert loudspeaker circuit and
For safety regulations it is important to place series resistors on the alert output
lines, as illustrated in Figure
design stage, but may be changed to a different value during audio safety testing, in
case attenuation in the alert gain is required.
Module Hardware Description
Chapter 2: Hardware Interface Description
Table 2-9 gives the loudspeaker
2-21. The resistors value should be R = 0 at the
Ω
33