Users Manual Part 2

SIM8260A_Hardware Design_V1.05

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W_DISABLE pin status

Module operation

Input low level

Flight mode: RF is disabled

Input high level

AT+CFUN=0: Minimal functional mode (SIM card function is off)

AT+CFUN=4: Flight mode (SIM card function is on)

AT+CFUN=1: RF is enabled (Default)

Both W_DISABLE and AT commands can change the working mode of the module, but W_DISABLE has a

higher priority. When W_DISABLE is low, it is forced to enter flight mode. When W_DISABLE is high, it can

enter different working modes by sending AT commands.

3.19 TDD_SYNC_PPS

SIM8260A support TDD_SYNC_PPS signal, it can generate pulse use for indication NSA and SA sub6 the

beginning frame flag of DL-UL, the pin level is 1.8V, customers can direct connect this pin to TDD

synchronous input circuit.

Recommended reference circuit is shown in the following figure.

Figure 41: TDD_SYNC_PPS pin reference circuit

Table 50: Definition of TDD_SYNC_PPS pin

Pin name

Pin no.

Electrical

description

Description

Comments

TDD_SYNC_PPS

AW21

1. It can generate pulse

use for indication NSA and

SA sub6 the beginning

frame flag of DL-UL

2. The TDD_SYNC_PPS

pin also can be configured

GPS_1PPS signal output

by software

1.8V voltage domain.

The TDD_SYNC_PPS

and GPS_1PPS

function can’t be used

at the same time.



The TDD_SYNC_PPS pin also can be configured GPS_1PPS signal output by software, the

NOTE