Gemalto Cinterion BGS5T USB, Обзор аппаратного интерфейса, Страница: 31 / 50

Cinterion
®
Java Terminals Hardware Interface Overview
3.6 GPIO Interface
39
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EHSxT_BGS5T_HIO_v03 2016-05-26
Confidential / Released
Page 31 of 50
3.6.5 PWM Interface
The GPIO6 and GPIO7 pins at the GPIO connector can be configured as Pulse Width Modu-
lation signals PWM1 and PWM2 by AT^SCFG command - see
[1] . The PWM interface lines
are output lines and can be used, for example, to connect buzzers. The PWM1 line is shared
with GPIO7 and the PWM2 line is shared with GPIO6 (see also
Table 13 ). GPIO and PWM
functionalities are mutually exclusive
1
.
3.6.6 Pulse Counter
The GPIO8 pin at the GPIO connector can be configured as pulse counter line COUNTER by
AT^SCFG command - see
[1] . The pulse counter interface is an input line and can be used, for
example, as a clock (see also Table 13 ). GPIO and COUNTER functionalities are mutually ex-
clusive
1
.
3.6.7 Analog-to-Digital Converter (ADC)
ADC1_IN can be used for general purpose voltage measurements. ADC1_IN is configured and
read by the AT^SRADC command - see
[1] . ADC1_IN, DSR0 and SPI functionalities are mu-
tually exclusive.
3.6.8 DSR0 signal
The DSR0 line available at the RS-232 interface is also routed to the GPIO connector and avail-
able as a separate pin. DSR0 can be configured by AT^SCFG command - see
[1] . DSR0,
ADC1_IN and SPI functionalities are mutually exclusive.
1. Note: For the PWM interface and pulse counter to operate, the directions of the Java Terminals‘ GPIO
level shifters must be set according to the defined directions of the PWM and COUNTER signals.