User's Manual

A8000 User Guide

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A8000_User_Guide_V1.0 Page 9 of 22 2009/05/13

• Receive a voice or data call from network to wake up A8000;

• Receive a SMS from network to wake up A8000;

• Hardware interrupts (such as Key press or GPIO interrupt).

2.1.6 RESET_N

RESET provides an external reset control signal for A8000 system. It should be noted that logic

LOW level is an effective signal for RESET_N

2.2 UART Interface

2.2.1 UART Interface Description

A8000 provides an UART to communicate with other terminal equipments, and support data The

GSM module is designed as a DCE (Data Communication Equipment). The UART pins descripton

is given in Table2-2 and table 2-3 lists the Logic levels of UART pins.

Table2-2 UART pins description of A8000

Signal Name PIN No. I/O Description

DATA_DCD 19 I/O UART: Data Carrier detection

DATA_DTR 22 I/O

UART: Data set ready

DATA_RI 23 I/O

UART: Ringing

DATA_CTS 24 I/O

UART: Clear to send

DATA_RTS 25 I/O UART: Ready to send

DATA_RX 26 I/O UART: Received data

DATA_TX 27 I/O UART: Transmitted data

GND 1,2,4,5,20

,21,49,59,

- Ground

Table2-3: Logic levels of UART pins

Parameter Min Max Unit

Logic low input 0 0.3*VDD_LIO V

Logic high input 0.7 *VDD_LIO VDD_LIO +0.3 V