Cinterion
®
Java Terminal Hardware Interface Description
3.8 GPIO Interface
40
PLS62T-W_HID_v01
2018-06-20
Confidential / Prelimenary
Page 33 of 91
3.8.4
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
. 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
). GPIO and PWM
functionalities are mutually exclusive
1
.
3.8.5
Pulse Counter
The GPIO8 pin at the GPIO connector can be configured as pulse counter line COUNTER by
AT^SCFG command - see
. The pulse counter interface is an input line and can be used, for
example, as a clock (see also
). GPIO and COUNTER functionalities are mutually ex-
clusive
3.8.6
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. For electrical characteristics see
. DSR0 can be configured
by AT^SCFG command - see
. DSR0, GPIO and SPI functionalities are mutually exclusive.
1.
Note:
For the PWM interface and pulse counter to operate, the directions of the Java Terminal‘ GPIO
level shifters must be set according to the defined directions of the PWM and COUNTER signals. See
and
for more information on how to change level shifter directions.
