12 buzzer, 13 led, Buzzer led – Sony Ericsson GR47/GR48 User Manual
Page 42: The led states shown below, are hard coded
5. SYSTEM CONNECTOR INTERFACE
42
LZT 123 7589 R1A
The electrical characteristics are given below. The signal reference is
DGND.
5.12 Buzzer
Connecting the BUZZER signal to an inverting transistor-buffer followed
by a piezoelectric transducer enables the radio device to play pre-
programmed melodies or sounds.
5.13 LED
The LED states shown below, are hard coded.
Mode
SERVICE Voltage (V)
Drive Capacity
Min.
Typ.
Max.
Normal Operation
0.8
-
Service/enable
programming
1.9
2.75V
3.6
> 1 mA
Absolute maximum
voltage
13.5
Pin
Signal
Dir
Description
31
BUZZER
O
Buzzer output from radio device
Pin
Signal
Dir
Description
33
LED
O
LED Output from radio device
LED indication
Operational status
No indication
No power or in the OFF state
Green, steady
Power on, not connected to a network
Green, blinking
Power on, connected to a network