UMTS/HSPA Module Series
UC20 Hardware Design
UC20_Hardware_Design Confidential / Released 49 / 82
3.16. Operating Status Indication
3.16.1. STATUS
The STATUS pin is an open drain output for indicating the module operation status. You can connect it to
a GPIO of DTE with pulled up, or as LED indication circuit as below. When the module is turned on
normally, the STATUS will present the low state. Otherwise, the STATUS will present high-impedance
state.
Table 19: Pin Definition of STATUS
Pin Name Pin No.
I/O
Description
Comment
STATUS
61
OD
Indicate the module operation status.
Require external pull-up.
The following figure shows different design circuit of STATUS, you can choose either one according to
your application demands.
VDD_MCU
10K
Module
STATUS
MCU_GPIO
Module
STATUS
VBAT
2.2K
Figure 30: Reference Circuit of the STATUS
3.16.2. SLEEP_IND
The SLEEP_IND is an indicated pin for judging whether the module is in sleep mode or not. When the
module enters into the sleep mode, the SLEEP_IND will output a logic high level. So you can use the
SLEEP_IND for low current indication. The following table shows the pin definition of SLEEP_IND.
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