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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

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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