User's Manual

LZT 123 1834 65
Figure 5.12-1 SERVICE Pin Interface
Signal Mode Value
Minimum input voltage 2.5 V
Active High
Maximum input voltage 12.0 V
SERVICE
Inactive Low Maximum input voltage 0.8 V
There are two methods for updating the firmware in the GR64:
Sony Ericsson Emma III and Updater. The Emma III system is a web
based tool that accesses a Sony Ericsson server from which signed
software can be downloaded. The Updater is a local application
that downloads a signed image provided by SEMC.
5.13 Buzzer
Pin Name Direction Function
31 BUZZER Output Buzzer Output
Connecting the BUZZER signal to an inverting transistor-buffer followed by a
piezoelectric transducer enables the wireless modem to play pre-programmed
melodies or sounds.
NOTE