CM109 Datasheet, PDF (29/36 Pages) C-Media Electronics – USB I/O Controller

7.6 Buzzer Output
CM109
High Integration / Low Cost USB Audio Controller
for PC Internet Phone
Each time the software set "1" to the register HID-OR0 bit 5, an embedded ringing
sequence is played once. Since the delay between one sequence and next sequence
is long (around 1 second ~ 2 second), this delay to be set by software, H/W only play
one sequence and then stop for one register write.
0.025 sec
0.025 sec
0.025 sec
ringing phase content
0.025 sec
0.025 sec
0.025 sec
0.025 sec
0.025 sec
5KHz
300Hz
5KHz
300Hz
5KHz
300Hz
5KHz
300Hz
0.2 sec
ringing
0.1 sec
silent
0.2 sec
ringing
0.4 sec
silent
0.2 sec
ringing
0.1 sec
silent
0.2 sec
ringing
silent & wait next trigger
Date: 08/Sep/2005
- 28 -
Version: 1.3a