Specifications

SB-P-06-4066
sepura
Mobile & Gateway Accessory i/f
specification
30th July 2012
Page 20 of 39
Issue 7c
© Sepura plc 2011
Pin
Number
SRM Signal
Name
Input/
Output
SRM2
Description
Performance
7
GPI_1
I
Programmabl
e I/O input 1
VIH min = 2.0V
VIL max = 0.8V
Protected against accidental application of vehicle supply
voltage
Assertion time: >100ms
(see also note 10)
8
GPI_3
I
Programmabl
e I/O input 3
VIH min = 2.0V
VIL max = 0.8V
Protected against accidental application of vehicle supply
voltage
Assertion time: >100ms
(see also note 10)
13
LS_A
O
Loudspeaker
Typical solution is a balanced 4 ohms single speaker with
8W maximum load power.
The speaker drive is rated to support two parallel 4 ohm
speakers in a balanced 2 ohm configuration.
Speakers with power rating of less than 8W may be prone
to damage.
See section 5.3
14
ODO_1
O
Programmabl
e I/O output
Open drain, active low.
500mA max sink current
15.8V max external voltage
Protected against inductive loads.
VOL max = 200mV @ 0.5A
15
GPI_2
I
Programmabl
e I/O input 2
VIH min = 2.0V
VIL max = 0.8V
Protected against accidental application of vehicle supply
voltage
Assertion time: >100ms