User's Manual

UMTS/HSPA Module Series
UG95 Hardware Design
UG95_Hardware_Design Confidential / Released 45 / 67
3.14. Network Status Indication
The NETLIGHT signal can be used to drive a network status indication LED. The following tables describe
pin definition and logic level changes in different network status.
Table 17: Pin Definition of Network Indicator
Pin Name
Pin No. I/O
Description
Comment
NETLIGHT
21
DO
Indicate the module network activity
status.
1.8V power domain.
Table 18: Working State of the Network Indicator
Pin Name
Status
Description
NETLIGHT
Flicker slowly (200ms High/1800ms Low)
Networks searching.
Flicker slowly (1800ms High/200ms Low)
Idle.
Always High
Voice&CSD calling.
A reference circuit is shown in the following figure.
4.7K
47K
VBAT
2.2K
Module
NETLIGHT
Figure 28: Reference Circuit of the NETLIGHT