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A008 / A6188+ – Circuit Description
then switches the Multiplexer from the output of
will switch to 13MHz.
Phase 1
Phase 2
Y230
26MHz
F
F
2
Logic: SIM Card Interface
1) Once powered up, the SIM card is interrogated. The SIM interface is part of the
Whitecap U800
and it supports both 'synchronous' (Prepay card) and asynchronous,
serial data transmission, though the A008 is programmed only for asynchronous.
VSIM1
(SIM_VCC) is originally programmed to 3V but if the card is 5V then the
SIM card will be powered down and
Whitecap interprets that the card is 5V if after programming with 3V, it cannot read
any data from the card. The signal levels for in and out of the SIM are now required
to be level shifted within
•
Reset
(Whitecap Pin E9 – RST0) in to GCAP II Pin E9 – LS1_IN_TG1A. This
signal is then level shifted to the required voltage and fed out to
Pin 4 from Pin J7 - LS1_OUT_TG1A.
• Clock: This is a 3.25MHz signal from Whitecap –
– LS2_IN. This signal is then level shifted to the required voltage and fed out to
Contacts J900
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
voltage and out through Pin K10 (LS3_TX_PA_B+) to Whitecap Pin F3 DAT0_TX.
For RX data from Whitecap Pin B5
where the signal is level shifted to desired voltage and outputted on Pin J8
to SIM contacts Pin 5
•
SIM_PD
– This signal is provided by the signal
BATT+. If there are no batteries present then the unit will display 'Insert Battery'. If
batteries are present but the SIM card is either not inserted or faulty '! NO SIM
CARD ' will be displayed. The reason behind this is to prevent the extra cost of a
Motorola Internal Use
PLL
200kHz
F
Detector
F
130
Multiplexer
13MHz Output
to Whitecap
VSIM1
GCAP II U900
to 3V these signals are:
DATA0_RX
SIM
I/O.
12
Y200
to the
CR230
Error Voltage
F
Phase
F
65
will be reprogrammed to 5V The
CLK0
Pin E7 to GCAP II Pin G6
SIM
I/O. Through level shifter to desired
to GCAP II, Pin H8 –
THERM
(Batt Contact
output. A high
CR230
13MHz
MAGIC IC
U913
SIM Contacts J900
SIM
LS3_RX
SIM I/O
J610), or by
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