User's Manual

– –
HILONC- 3GPS APPLICATION NOTE
·
The
UART_DSR
signal is used to prevent HILONC-3GPS from entering sleep mode or to switch between
DATA
and AT commands or to hang up a call or to wake up the module etc…
.
3.5.4. Partial V24 (RX-TX) Connection of HILONC-3GPS to host
When using only
RX/TX
instead of the complete V24 link the following schematic can be used:
HiLoNC3GPS
pin60
pin17
UART1_TX
UART1_RX
DTE_RX
DTE_TX
DTE device
UART1_RTS
pin59
UART1_CTS
pin16
UART1_DSR
pin15
UART1_DTR
pin14
UART1_DCD
pin58
NC
UART1_RI
pin61 NC
GND is not represented.
: Partial V24 connection (2 wires) of HILONC-3GPS to host
 As
UART_DTR
is active (low electrical level) once HILONC-3GPS is switched on,
UART_DSR
is also active
(low electrical level), therefore the AT command
“
AT+Ksleep
”
can switch between the two available sleep
modesHILONC.
 As
UART_RTS
is active (low electrical level) once HILONC-3GPS is switched on,
UART_CTS
is also active
(low electrical level), therefore the AT command
“
AT+Ksleep
”
can switch between the two available sleep
modesHILONC. The HILONC-3GPS's firmware allows activation of
UART_RTS
during sleep state even when
looped to the
UART_CTS
signal.

UART_DCD
and
UART_RI
can remain disconnected and floating when not in use.
 Note that this configuration does not allow the below signals:
· RI
signal used when programmed to indicate an incoming voice or data call or incoming SMS
etc…
.
· UART_DCD
signal used to indicate GPRS connections.
· UART_DTR
signal used to indicate the module UART interface is ON.
· UART_DSR
signal used to prevent the HILONC-3GPS module from entering sleep mode.
3.6. GPIO
There are six GPIOs available on the HILONC-3GPS. Customer applications can directly access them through
appropriate AT commands such as:
- Output: pin is set to High or Low state.
- Input: pin is read on request and customer application is responded to.
As an input different scenarios are possible to cover a maximum range of customer applications:
· Synchronous answer to AT command
.
· Asynchronous answer to AT command.
Customer
’s
application prior to the read request has configured the
GPIO to react to falling/rising edges. The customer application is notified asynchronously by AT command
answer when the configured trigger occurs.
Note d’étude / Technical document :
01/08/20111 - Page 19 / 41