SQ864
GPRS Terminal
6
Sales: +44 (0) 118 967 9000
Fax: +44 (0) 118 976 9020
www.sequoia.co.uk
Rev 2.1.4 Jan 2011
Wireless Technology
Experience The Freedom
Table 3 Power connector pin function
Table 4 Modem Power on state
Each pin of type Input is activated when the voltage on the pin is in the range +2.1V to +16V DC. Pins of type I/O are activated when the
voltage on the pin is in the range +2.1V to +12V DC. The minimum output drive voltage on pins type I/O is 2.2V
5.2 I/O Interface
A mini USB type B connector is provided for general purpose IO. ESD protection to +/-4KV contact discharge and +/-8KV air discharge is
provided. Pins on this connector are available for control from the embedded application as shown in table 5.
PIN number
Part number
Function
1
0V
Common 0V connection
2
RESET_IN
External reset input. 0V to 0.5V, or open circuit inactive (Reset OFF), 2 to
16V active (Reset ON), must be active for at least 200ms then released.
3
POWER_OFF_IN
External power Off input, 0V to 0.5V, or open circuit inactive, 2 to 16V pulse
active (no minimum duration) (POWER OFF).
4
POWER_ON_IN
External power ON input, 0V to 0.5V, or open circuit inactive, 2 to 16V pulse
(no minimum duration) active (POWER ON). Not required for initial power
up, only if unit turned off with POWER_OFF_IN.
5
IGNITION_IN
Optional: Detection of ignition on.
6
POWER +VE
12V nominal, 5-16V DC, 2A peak, reverse polarity protected
Modem State
Pin-4 (ON)
Pin-3 (OFF)
Modem ON/OFF
OFF
ACTIVE
ACTIVE
OFF
ON
ACTIVE
ACTIVE
ON
ON
NOT-ACTIVE
ACTIVE
Switches OFF
OFF
NOT-ACTIVE
ACTIVE
OFF
OFF
ACTIVE
NOT-ACTIVE
Switches ON
ON
ACTIVE
NOT-ACTIVE
ON
