UMTS/HSPA Module Series
UG96 Hardware Design
UG96_Hardware_Design 46 / 76
codec with a 13/26MHz clock generated from the module. Please refer to
document [1]
for details. If
unused, keep it open.
3.
A RC (e.g. R=22Ω, C=47pF) circuit is recommended to be reserved on CLK_OUT line. If external
audio CODEC is MAX9860, the RC circuit should be mounted; if it is ALC5616, then it is not mounted.
4. There is a need to provide a 2.048M main clock for MCLK pin if the external audio CODEC is
NAU8814.
3.14. Network Status Indication
The NETLIGHT signal can be used to drive a network status indication LED. The following tables describe
the pin definition and logic level changes in different network status.
Table 15: Pin Definition of NETLIGHT
Pin Name
Pin No. I/O
Description
Comment
NETLIGHT
21
DO
Indicate the module network status
1.8V power domain
Table 16: Working State of NETLIGHT
Pin Name
Status
Description
NETLIGHT
PWM (200ms High/1800ms Low)
Network searching
PWM (1800ms High/200ms Low)
Idle & Data transfer
Always High
Voice & CSD calling
A reference circuit is shown in the following figure.
4.7K
47K
VBAT
2.2K
Module
NETLIGHT
Figure 30: Reference Circuit of the Network Status Indicator