Cinterion EES3, Hardware Interface Description

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EES3 Hardware Interface Description
5.5 Pad Assignment and Signal Description
99
EES3_HD_v01.100b Page 84 of 118 2009-08-12
Confidential / Released

Emer-
gency
reset
EMERG_OFF I Internal pull-up: R
I
 10k

V
IL
max = 0.3V at Imax = -140

A
V
OH
min = 1.70V
V
OH
max = 1.90V
Signal
~~
|___|
~~
Active Low >10ms
Turn-off in case of emergency:
Pull down and release
EMERG_OFF.Falling edge
turns off the module.
Data stored in the volatile mem-
ory will be lost. For orderly soft-
ware controlled reset rather use
the AT+CFUN command (e.g.
AT+CFUN=x,1).
This line must be driven by
open drain or open collector.
If unused keep line open.
Power-on
reset
O Internal pull-up: R
I
 5k

V
OL
max = 0.2V at I = 2mA
V
OH
min = 1.75V
V
OH
max = 3.00V
Reset signal driven by the module:
(see also Figure 5 and Figure 6 )
Reset signal driven by the mod-
ule which can be used to reset
any application or device con-
nected to the module. Only
effective for approximately
220ms during the assertion of
IGT when the module is about
to start.
Syn-
chroni-
zation
SYNC O V
OL
max = 0.3V at I = 0.1mA
V
OH
min = 2.3V at I = -0.1mA
V
OH
max = 3.00V
n Tx = n x 577µs impulse each
4.616ms, with 180µs forward time.
There are two alternative
options for using the SYNC line:
a) Indicating increased current
consumption during uplink
transmission burst. Note that
the timing of the signal is differ-
ent during handover.
b) Driving a status LED to indi-
cate different operating modes
of EES3. The LED must be
installed in the host application.
To select a) or b) use the
AT^SSYNC command.
If unused keep line open.
RTC
backup
VDDLP I/O R
I
 1k

V
O
max = 4.5V
V
BATT+
= 4.5V:
V
O
= 3.2V at I
O
= -500µA
V
BATT+
= 0V:
V
I
= 2.7V…4.5V at Imax = 10µA
If unused keep line open.
Table 27:
Signal description
(Continued)
Function Signal name IO Signal form and level Comment