User Manual

MC45 Hardware Interface Description
P R E L I M I N A R Y
MC45_HD_01_V00.02a Page 63 of 90 12.08.2002
Function Signal name IO Signal form and level Comments
Ignition /IGT I
R
I
# 100kW, C
I
# 1nF
V
IL
max = 0.5V at Imax = -20µA
V
Open
max = 2.3V
ON
~~~
|____|
~~~
Active Low ³ 100ms
Input to switch the mobile
ON.
The line must be driven
low by an Open Drain or
Open Collector driver.
Emergency
shutdown
(Watchdog)
/EMERGOFF I
R
I
#22kW
V
IL
max = 0.5V at Imax = -100µA
V
Open
max = 2.73V
Signal
~~~
|______|
~~~
Active Low ³ 3.2s
Watchdog:
V
OL
max = 0.35V at I = 10µA
V
OH
min= 2.25V at I = -10µA
f
O
min = 0.16Hz
f
O
max = 1.55Hz
This line must be driven by
an Open Drain or Open
Collector driver.
Emergency shutdown
deactivates the power
supply to the module.
The module can be reset if
/IGT is activated after
emergency shutdown.
To switch the mobile off
use the AT^SMSO
command.
/EMERGOFF also
indicates the internal
watchdog function.
If unused keep pin open.
V
OL
max = 0.2V at I = 1mA
V
OH
min = 2.35V at I = -1mA
V
OH
max = 2.73V
Synchroni-
zation
SYNC O
1 Tx, 877µs impulse each 4.616ms and
2 Tx, 1454µs impulse each 4.616ms, with
300µs forward time.
Indicates increased current
consumption during uplink
transmission burst. Note
that timing is different
during handover.
Alternatively used to
control status LED.
If unused keep pin open.
CCIN I
R
I
# 100kW
V
IL
max = 0.5V
V
IH
min = 2.15V at I = 20µA,
V
IH
max=3.3V at I = 30µA
CCRST O
R
O
#47W
V
OL
max = 0.25V at I = 1mA
V
OH
min = 2.3V at I = -1mA
V
OH
max = 2.73V
CCIO IO
R
I
#10kW
V
IL
max = 0.5V
V
IH
min = 1.95V, V
IH
max=3.3V
R
O
#220W
V
OL
max = 0.4V at I = 1mA
V
OH
min = 2.15V at I = -1mA
V
OH
min = 2.55V at I = -20µA
V
OH
max = 2.96V
CCCLK O
R
O
#220W
V
OL
max = 0.4V at I = 1mA
V
OH
min = 2.15V at I = -1mA
V
OH
max = 2.73V
CCVCC O
R
O
max = 5W
CCVCCmin = 2.84V,
CCVCCmax = 2.96V
Imax = -20mA
SIM interface
CCGND Ground
CCIN = high, SIM card
holder closed (no card
recognition)
Maximum cable length
200mm to SIM card holder.
All signals of SIM interface
are protected against ESD
with a special diode array.
Usage of CCGND is
mandatory. See Chapter
3.7.3 for details on
grounding.