User's Manual


PCS3 Hardware Interface Description
6.5 Pad Assignment and Signal Description
PCS3_HD_v01.000
Confidential / Preliminary
Page 68 of 101 2013-10-21
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Please note that the reference voltages listed in Table 22 are the values measured directly on
the PCS3 module. They do not apply to the accessories connected.
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Table 22: Signal description
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Function Signal name IO Signal form and level Comment
Power
supply
BATT+_CDMA
BATT+_CDMA
I
V
I
max = 4.2V
V
I
norm = 3.8V
V
I
min = 3.3V during Tx burst on board
Imax 800mA, during Tx burst
Lines of BATT+ and GND
must be connected in paral-
lel for supply purposes
because higher peak cur-
rents may occur.
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Minimum voltage must not
fall below 3.3V including
drop, ripple, spikes.
BATT+ I
V
I
max = 4.2V
V
I
norm = 3.8V
V
I
min = 3.3V during Tx burst on board
Imax = 250mA
Power
supply
GND
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Ground Application Ground
External
supply
voltage
VEXT O CLmax = 1µF
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High power mode:
V
O
= 1.80V +1% -5%
I
O
max = -50mA
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Power save mode:
V
O
= 1.80V +2% -5%
I
O
max = -10mA
VEXT may be used for
application circuits. Not
available in Power down
mode.
If unused keep line open
and enable power save
mode via AT^SCFG=
"MEopMode/PowerMgmt/
VEXT", "low" (see [1])
The external digital logic
must not cause any spikes
or glitches on voltage
VEXT.
Ignition IGT I
R
PU
160k , C
I
1nF
V
OH
max=1.85V
V
IH
max =2.2V
V
IH
min = 1.17V
V
IL
max = 300mV
Low impulse width > 100ms
This signal switches the
module ON.
It is recommended to drive
this line low by an open
drain or open collector
driver connected to GND.
Emer-
gency Off
EMERG_OFF I
R
PU
160k , C
I
1nF
V
OH
max=1.85V
V
IH
max =2.2V
V
IH
min = 1.17V
V
IL
max = 300mV
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~~| |~~ low impulse width > 40ms
It is recommended to drive
this line low by an open
drain or open collector
driver connected to GND.
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If unused keep line open.