User's Manual

OUT
IN
– –
HILONC- 3GPS APPLICATION NOTE
TBD
: RTS versus PWRON signal during power on sequence
This signal configuration also enables all signals:
· UART_RI signal
is used when programmed to indicate an incoming voice or data call or SMS incoming
message, etc.
· UART_DCD signal
is used to indicate GPRS connections.
· UART_DTR signal
is used to indicate that the module
’s
UART interface is ON.
· UART_DSR signal
is used to prevent the HILONC-3GPS from entering sleep mode, switching between Data
and AT commands, hanging up a call or waking up the module etc.
 Avoid supplying power to the UART before the HILONC-3GPS is ON, as this may result in power up
sequence error.
3.5.2. Complete V24 Interface with PC
To use the V24 interface some adaptation of components is necessary. This is because HILONC-3GPS signals
need to be converted to +/- 5V signals compatible with a PC.
RS232
HiLoNC3GPS
pin60
pin17
pin59
pin16
pin15
pin14
pin58
pin61
UART1_TX
UART1_RX
UART1_RTS
UART1_CTS
UART1_DSR
UART1_DTR
UART1_DCD
UART1_RI
Transceiver
IN OUT
IN
OUT
OUT IN
OUT IN
IN OUT
IN OUT
IN OUT
RXD
TXD
CTS
RTS
DTR
DSR
DCD
RI
SUBD9 Female
GND is not represented.
Note: pin 5 is GND
: Connection to a data cable
 Avoid supplying power to the UART before the HILONC-3GPS is ON, as this could result in power up
sequence error.

UART_DTR
signal used to indicate module UART interface is ON (need to pull high the
UART_DTR
signal
with 470 K ohms to external 3V, as shown below):
Note d’étude / Technical document :
01/08/20111 - Page 17 / 41