Motorola Internal Use
10
V2288 – Circuit Description
•
Reset
(Whitecap Pin E9 –
RST0
) in to GCAP II
Pin K7
–
LS1_IN_TG1A
. This
signal is then level shifted to the required voltage and fed out to
SIM Contacts J803
Pin 4
from
Pin J7
-
LS1_OUT_TG1A
.
•
Clock: This is a 3.25MHz signal from Whitecap
Pin E9
–
CLK0
Pin E7
to GCAP II
Pin G6
–
LS2_IN
. This signal is then level shifted to the required voltage and fed out
to
SIM Contacts J803
Pin 6
from
Pin F6
–
LS2_OUT
.
•
SIM I/O
– Data transmission to and from SIM card; for TX, from SIM card contact
SIM I/O
Pin 5
through to GCAP II
Pin J8
SIM I/O
. Through level shifter to desired
voltage and out through
Pin K10
(
LS3_
) to Whitecap
Pin F3
DAT0_TX
.
For RX data from Whitecap
Pin B5
DATA0_RX
to GCAP II,
Pin H8
–
LS3_RX
where the signal is level shifted to desired voltage and outputted on Pin J8
SIM I/O
to SIM contacts
Pin 5
SIM I/O
.
•
SIM_PD
– This signal is provided by the signal
BATT_SENSE
, activated by GCAP
II,
BATTERY
Pin F7
. If there are no batteries present then the unit will not power
up. If batteries are present but the SIM card is either not inserted or faulty ‘CHECK
CARD ‘ will be displayed. The reason behind this is to prevent the extra cost of a
mechanical SIM presence detect switch and to prevent the SIM card being removed
whilst connected to Aux Power.
Logic: Charger Circuit
1)
The charging circuit
contains the new
COVIC U960
(Charging and Over Voltage
Integrated Circuit). See COVIC Block Diagram. There are 2 charge modes either full
rate charge or Trickle current charge.
2)
Trickle Rate is used to safely charge a dead battery up to its usable range or to top up
a charged battery.
3)
Full Rate is used to charge a battery within its usable range.
4)
For the circuit operation, as mentioned before the unit must first establish what type
of charger is connected. The charger plug is inserted into the
Charger Jack J904
. This
then results in
IRQ4
(
EXT B+_DET
) being pulled low through
Q961
(supported by
V2
). This interrupt is sent to Whitecap
Pin M3
.
5)
Once
IRQ4
is received GCAP II
Pin A1
then checks the
MAN_TEST_AD
DC
voltage level from Charger Jack
Pin 4
. The type of accessory connected will give a
different voltage level, dependant on the value of the MANTEST resistor within.
Some typical value are:
•
Illegal Charger -
MANTEST_AD
> 2.4V (unit does not beep, charge or enable
backlights)
•
CLA -
MANTEST_AD
< 2.4V but > 1.7V (Unit beeps, enables backlights and starts
to charge)
•
Easy Install Handsfree Car Kit -
MANTEST_AD
< 1.7V but > 0.8V (Unit beeps,
enables backlights and starts to charge)
•
AC Charger -
MANTEST_AD
< 0.8V (Unit beeps, enables backlights and starts to
charge)
NB*
CHGR_SW
MUST BE HIGH FOR
MANTEST_AD
TO BE READ.
