– 5-10 –
■
Subscriber Identity Module (SIM)
The Chip Card Interface is a customized UART with additional features used for a 3 Volt Subscriber Identity Module (SIM)
as specified by ISO 7816. It supports speed enhancement as specified in GSM 11.11 Phase 2+ with baud rates up to
100 kBaud. If the SIM card is disconnected, the chip card interface is able to power down the electrical contacts of the SIM
card automatically.
E-Gold + V3 features a GSM phase 11/11+ compliant SIM interface, providing support for 3 V normal and high-speed SIM
cards. 1.8 V cards are supported inherently, as 1.8 V cards according to specifications, must be able to work also at 3 V.
EB-X400 SIM interface is designed to support 3 V technology SIMs.
■
GSM Timer / RF Control
The GSM Timer and RF control modules are used to control all radio channel timings and to program external devices.
The main goal of the GSM timer is to off-load the MCU from scheduling periodic events within a TDMA frame. It provides
high flexibility in scheduling and executing events using a programmable RAM table and is able to generate timing and trigger
signals as well as interrupts to both the MCU and to the DSP. The RF Control Unit transmits user defined control information
to up to 5 devices via two separate serial interfaces. The RAM of the RF Control Unit holds up to 40 messages and 6 times
16 values for power amplifier ramping. The reference counter of the GSM Timer Unit is the TDMA counter of the TDMA
Compare Unit.
The TDMA counter is a programmable modulo 10000 D 15 bit counter, operated by a 0.461
µ
sec clock and allows to
measure the length of one TDMA frame (4.615 msec) with a resolution of one eights of a bit. The RAM of the GSM Timer
Unit contains the information at what time within a TDMA frame, one (or more) of the 26 output signals TRIG (25 : 0) change
its value (called timing compare value), and the new values of all output signals at this time. One timing compare value and
the corresponding TRIG (25:0) signal values are called timing event. The RAM operates like a FIFO. The TDMA Compare
Unit compares the last timing compare value of the FIFO with the TDMA counter value. When both values are identical, the
corresponding output values for TRIG (25 : 0) are read out of the RAM and taken over by the external signals. After a match,
the RAM address is incremented by the address generator of the RAM Control Block and the next timing compare value is
address decoder.
T_OUT Name
Feature
Ball
EB-X400 Use
Connection
T_OUT0
TXON
F16
Transmitter block power control
SmartiDC
T_OUT1
PLLON
F14
Phase Lock Loop ON
SmartiDC
T_OUT2
BAND_SEL
F15
Band select GSM/DCS
SmartiDC
T_OUT3
NC
G16
No Connection
T_OUT4
AM_TRIG
G14
AM signal detection
SmartiDC
T_OUT5
CAM_INT
G17
Camera Module interrupt
Companion IC
T_OUT6
NC
E17
No Connection
T_OUT7
DISP_RST
F17
Display Reset Signal
LCD Module
T_OUT8
TXON_PA
G15
Power Amplifier ON
Power Amplifier
T_OUT9
EP_INT
H16
E-Power interrupt
E-Power
T_OUT10
GND
J14
Ground
Ground
T_OUT11
HOOK_KEY
H15
Hook Key detection on Personal HF
Personal HF
T_OUT12
NC
K17
No Connection
■
RTC
Real Time Clock block in U2001 E-Gold + V3 is used for EB-X400. The integrated RTC in the E-Gold + consumes only approx.
1 - 2
µ
A, hence backup can be provided simply by adding a large capacitance on the RTC supply.
In backup mode (E-Gold + powered off) with only the RTC running, the RTC will operate down to app. 1 V. EB-X400 has very
large backup capacitors. Thus, EB-X400 inserts a series resistor to avoid initial charging of the capacitor and clamps the RTC
supply, preventing the RTC circuit to work during E-Gold + initialization.
EB-X400 uses the micro capacitor instead of backup battery to save the cost and chip mount area.
The Transceiver IC U101 (PMB6256VV1.1) set does not support the backup function in these LSIs, it is necessary to add the
external regulator and power control circuit for backup battery charging.
The backup battery capacity is 50
µ
Ah (2.6 V to 0.0 V discharge).
Summary of Contents for EB-X400
Page 86: ...12 1 12 LAYOUT DIAGRAMS 12 1 Main Board U2001 ...
Page 87: ...12 2 ...
Page 88: ...12 2 Upper Face PCB 12 3 Green Black Black White ...
Page 89: ...12 3 Hinge PCB 12 4 ...
Page 90: ...12 4 SIM PCB 12 5 ...