UC864 Hardware User Guide 1vv0300766a Rev.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 This document is relating to the following products: UC864-E 3990250694 Reproduction forbidden without Telit Communications S.p.A.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 Contents 1 Overview ........................................................................................................................... 6 2 Mechanical Dimensions................................................................................................... 7 3 UC864-E module connections ......................................................................................... 8 3.1 PIN-OUT ............................................
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 10.3 Selection ................................................................................................................................ 38 10.4 Electrical Characteristics ..................................................................................................... 39 10.4.1 10.4.2 Input lines (microphone) .................................................................................................................
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 DISCLAIMER The information contained in this document is the proprietary information of Telit Communications S.p.A. and its affiliates (“TELIT”). The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Telit, is strictly prohibited.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 1 Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit UC864-E module. In this document all the basic functions of a mobile phone will be taken into account; for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 2 Mechanical Dimensions The Telit UC864-E module overall dimensions are: • • • Length: Width: Thickness: 36.2 mm 30 mm 4.8mm Reproduction forbidden without Telit Communications S.p.A.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 3 UC864-E module connections 3.1 PIN-OUT UC864-E uses an 80-pin Molex p.n. 53949-0878 male connector for the connections with the external applications. This connector matches the 54150-0878 models.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 Pin Signal I/O Function Internal Pull up Type UC864-E 23 RX_TRACE I RX Data for debug monitor CMOS 2.6V 24 TX_TRACE O TX Data for debug monitor CMOS 2.6V Prog. / Data + Hw Flow Control 25 C103/TXD I Serial data input (TXD) from DTE CMOS 2.6V 26 C104/RXD O Serial data output to DTE CMOS 2.6V 27 C107/DSR O Output for Data set ready signal (DSR) to DTE CMOS 2.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 Pin Signal I/O Function Internal Pull up Type UC864-E 61 TGPIO_15 I/O Telit GPIO15 Configurable GPIO CMOS 2.6V 62 TGPIO_12 I/O Telit GPIO12 Configurable GPIO CMOS 2.6V 63 TGPIO_10/ PCM_TX I/O Telit GPIO10 Configurable GPIO / PCM Data Output CMOS 2.6V 64 TGPIO_22 I/O Telit GPIO22 Configurable GPIO CMOS 1.8V 65 TGPIO_18/ PCM_RX I/O Telit GPIO18 Configurable GPIO / PCM Data input CMOS 2.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 NOTE: If not used, almost all pins should be left disconnected.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 4 Hardware Commands 4.1 Turning ON the UC864-E To turn on UC864-E, the pad ON# must be tied low for at least 1 second and then released. The maximum current that can be drained from the ON# pad is 0,1 mA. A simple circuit to do it is: ON# R1 Q1 Power ON impulse R2 GND NOTE: UC864-E turns fully on also by supplying power to the USB_VBUS pin (provided there's a battery on the VBATT pads).
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 For example: 1- Let's assume you need to drive the ON# pad with a totem pole output of a 1.8/5 V microcontroller (uP_OUT1): 10k 2- Let's assume you need to drive the ON# pad directly with an ON/OFF button: 1.8 / 5V 1s Reproduction forbidden without Telit Communications S.p.A.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 4.2 Turning OFF the UC864-E The turning off of the device can be done in three ways: • By software command (see UC864-E Software User Guide) • By hardware shutdown • By Hardware Unconditional Restart When the device is shut down by software command or by hardware shutdown, it issues to the network a detach request that informs the network that the device will not be reachable any more. 4.2.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 4.2.2 Hardware Unconditional Restart To unconditionally restart UC864-E, the pad RESET# must be tied low for at least 200 milliseconds and then released. The maximum current that can be drained from the ON# pad is 0,15 mA. A simple circuit to do it is: RESET# Unconditional Restart impulse GND NOTE: Do not use any pull up resistor on the RESET# line or any totem pole digital output.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 10k For example: 1- Let's assume you need to drive the RESET# pad with a totem pole output of a +1.8/5 V micro controller (uP_OUT2): +1.8 / 5V * This signal is internally pulled up so the pin can be left floating if not used. NOTE: If UC864-E is connected as USB slave (considering also the presence of VBATT supply), when powered off it automatically switch on again. Reproduction forbidden without Telit Communications S.p.A.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 5 Power Supply The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances, hence read carefully the requirements and the guidelines that will follow for a proper design. 5.1 Power Supply Requirements POWER SUPPLY Nominal Supply Voltage 3.8V Max Supply Voltage 4.2 Supply Voltage Range 3.51 – 4.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 If the layout of the PCB is not well designed a strong noise floor is generated on the ground and the supply; this will reflect on all the audio paths producing an audible annoying noise at 216 Hz; if the voltage drop during the peak current absorption is too much, then the device may even shutdown as a consequence of the supply voltage drop.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 5.2 General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps: • The electrical design • The thermal design • The PCB layout. 5.2.1 Electrical Design Guidelines The electrical design of the power supply depends strongly from the power source where this power is drained.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 An example of linear regulator with 5V input is: 5.2.1.2 + 12V input Source Power Supply Design Guidelines • • • • • • • The desired output for the power supply is 3.8V; hence due to the big difference between the input source and the desired output, a linear regulator is not suited and shall not be used. A switching power supply will be preferable because of its better efficiency especially with the 2A peak current load represented by UC864-E.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 An example of switching regulator with 12V input is in the below schematic (it is split in 2 parts): Reproduction forbidden without Telit Communications S.p.A.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 5.2.1.3 Battery Source Power Supply Design Guidelines • • The desired nominal output for the power supply is 3.8V and the maximum voltage allowed is 4.2V, hence a single 3.7V Li-Ion cell battery type is suited for supplying the power to the Telit UC864-E module. The three cells Ni/Cd or Ni/MH 3.6 V Nom.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 The constant voltage charge proceeds with a fixed voltage regulator (very accurately set to the maximum battery voltage) and hence the current will decrease while the battery is becoming charged. When the charging current falls below a certain fraction of the fast charge current value, then the battery is considered fully charged, the final charge stops and eventually starts the maintenance.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 5.2.2 Thermal Design Guidelines The thermal design for the power supply heat sink should be done with the following specifications: • Average current consumption during WCDMA transmission @PWR level max: 620mA • Average current consumption during class12 GPRS transmission @PWR level max: 930mA NOTE: The average consumption during transmissions depends on the power level at which the device is requested to transmit by the network.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 5.2.3 Power Supply PCB layout Guidelines As seen on the electrical design guidelines the power supply shall have a low ESR capacitor on the output to cut the current peaks and a protection diode on the input to protect the supply from spikes and polarity inversion. The placement of these components is crucial for the correct working of the circuitry. A misplaced component can be useless or can even decrease the power supply performances.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 6 Antenna The antenna connection and board layout design are the most important part in the full product design and they strongly reflect on the product overall performances, hence read carefully and follow the requirements and the guidelines for a proper design. 6.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 6.2 • • • • Antenna - Installation Guidelines Install the antenna in a place covered by the GSM/WCDMA signal. The Antenna must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter; Antenna shall not be installed inside metal cases Antenna shall be installed also according Antenna manufacturer instructions.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 7 Logic level specifications Where not specifically stated, all the interface circuits work at 2.6V CMOS logic levels. The following table shows the logic level specifications used in the Telit UC864-E interface circuits: For 2.6V CMOS signals: Absolute Maximum Ratings -Not Functional Parameter Input level on any digital pin when on Input voltage on analog pins when on UC864-E Min Max -0.3V +3.0V -0.3V +3.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 7.1 Reset signal Signal Function I/O PIN Number RESET Phone reset I 54 RESET is used to reset the UC864-E module. Whenever this signal is pulled low, UC864-E is reset. When the device is reset it stops any operation. After the release of the reset UC864-E is unconditionally shut down, without doing any detach operation from the network where it is registered.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 8 Serial Ports The serial port on the Telit UC864-E is the interface between the module and OEM hardware. 2 serial ports are available on the module: • MODEM SERIAL PORT • MODEM SERIAL PORT 2 (DEBUG) 8.1 MODEM SERIAL PORT Several configurations can be designed for the serial port on the OEM hardware, but the most common are: • RS232 PC com port • microcontroller UART @ 2.
UC864-E Hardware User Guide 1vv0300766a Rev.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 8.2 RS232 level translation In order to interface the Telit UC864-E with a PC com port or a RS232 (EIA/TIA-232) application a level translator is required. This level translator must Invert the electrical signal in both directions Translate the level from 0/2.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 An example of level translation circuitry of this kind is: The example is done with a SIPEX SP3282EB RS232 Transceiver that could accept supply voltages lower than 3V DC. NOTE: In this case Vin has to be set with a value compatible with the logic levels of the module (Max 2.9V DC). In this configuration the SP3282EB will adhere to EIA/TIA-562 voltage levels instead of RS232 (-5 +5V) Reproduction forbidden without Telit Communications S.p.A.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 Second solution could be done using a MAXIM transceiver (MAX218) In this case the compliance with RS232 (+-5V) is possible. Another level adapting method could be done using a standard RS232 Transceiver (MAX3237EAI) adding some resistors to adapt the levels on the UC864 Input lines. NOTE: In this case has to be taken in account the length of the lines on the application to avoid problems in case of High-speed rates on RS232.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 5V UART level translation If the OEM application uses a microcontroller with a serial port (UART) that works at a voltage different from 2.6 – 2.9V, then a circuitry has to be provided to adapt the different levels of the two sets of signals. As for the RS232 translation there are a multitude of single chip translators.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 NOTE: The UART input line TXD (rx_uart) of UC864-E is NOT internally pulled up with a resistor, so there may be the need to place an external 47KΩ pull-up resistor, either the DTR (dtr_uart) and RTS (rts_uart) input lines are not pulled up internally, so an external pull-up resistor of 47KΩ may be required. A power source of the internal interface voltage corresponding to the 2.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 9 USB Port UC864-E includes an integrated universal serial bus (USB) transceiver, compliant with USB 2.0 specification, for interfacing UC864-E to a computer as a USB peripheral or connecting the UC864-E to other peripherals. It supports the USB low-speed (1.5 Mbits/s) and full-speed (12 Mb/s) modes. In HSDPA (High Speed download Packet Access) mode, the downlink data speed rates up to 7.2Mbps.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 10 Audio Section Overview 10.1 Generality The UC864-E Audio Section provides two audio paths both in transmit and in receive sections, active only one at time. Two buffering amplifiers could be used in Differential or Single Ended configuration. To select the well-suited section, refer to paragraph 10.3 Selection mode. For applications and suggestion refer to the Telit modules Audio Application Note (80000NT10007a) 10.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 10.4 Electrical Characteristics 10.4.1 Input lines (microphone) The two transmit blocks are fully equivalent, connected in Differential mode Line coupling Line type Coupling capacitor Differential input resistance Differential input voltage AC (*) Balanced ≥ 100nF 20kΩ ≤ 1,03Vpp @ HSMicG=0dB Table 1.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 10.4.2 Output lines (speaker) During designing, remember that while no difference could be if the amplifiers drive an external amplifier, there are slightly different electrical performances when the load is driven directly from the internal audio amplifiers, due to differential output voltage. Line coupling Line type Output load resistance Max.
UC864-E Hardware User Guide 1vv0300766a Rev.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 Not all GPIO pads support all these three modes: • GPIO5 supports all three modes and can be input, output, RFTX monitor output (Alternate function) • GPIO6 supports all three modes and can be input, output, alarm output (Alternate function) • GPIO7 supports all three modes and can be input, output, buzzer output (Alternate function) 11.1 Logic level specifications Where not specifically stated, all the interface circuits work at 2.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 11.2 Using a GPIO Pad as INPUT The GPIO pads, when used as inputs, can be connected to a digital output of another device and report its status, provided this device has interface levels compatible with the 2.6V CMOS levels of the GPIO. NOTE: If the digital output of the device to be connected with the GPIO input pad has interface levels different from the 2.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 11.5 Using the Buzzer Output GPIO7 The GPIO7 pad, when configured as Buzzer Output, is controlled by the UC864-E module and will drive with appropriate square waves a Buzzer driver. This permits to your application to easily implement Buzzer feature with ringing tones or melody played at the call incoming, tone playing on SMS incoming or simply playing a tone or melody when needed by your application.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 11.6 Indication of network service availability The STAT_LED pin status shows information on the network service availability and Call status. In the UC864-E modules, the STAT_LED usually needs an external transistor to drive an external LED. Therefore, the status indicated in the following table is reversed with respect to the pin status.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 11.7 RTC Bypass out The VRTC pin brings out the Real Time Clock supply, which is separate from the rest of the digital part, allowing having only RTC going on when all the other parts of the device are off. To this power output a backup capacitor can be added in order to increase the RTC autonomy during power off of the battery. Parameter Symbol min. Input Voltage VRTC Input current, Xtal ON IRTC Limit Values typ. max. 1.50 3.0 3.25 1.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 11.9 Mounting UC864-E on your board The position of the Molex board-to-board connector and the pin 1 are shown in the following picture. NOTE: metal tabs present on UC864-E should be connected to GND Reproduction forbidden without Telit Communications S.p.A.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 11.9.1 Debug of the UC864-E in production To test and debug the mounting of the UC864-E, we strongly recommend to foreseen test pads on the host PCB, in order to check the connection between the UC864-E itself and the application and to test the performance of the module connecting it with an external computer.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 12 Conformity Assessment Issues The UC864-E module is assessed to be conforming to the R&TTE Directive as stand-alone products, so if the module is installed in conformance with Dai Telecom installation instructions require no further evaluation under Article 3.2 of the R&TTE Directive and do not require further involvement of a R&TTE Directive Notified Body for the final product.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 13 SAFETY RECOMMANDATIONS READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required. The use of this product may be dangerous and has to be avoided in the following areas: Where it can interfere with other electronic devices in environments such as hospitals, airports, aircrafts, etc. Where there is risk of explosion such as gasoline stations, oil refineries, etc.
UC864-E Hardware User Guide 1vv0300766a Rev.1 - 31/01/08 14 Document Change Log Changes Revision Date Rev.0 Rev.1 23/10/2007 Initial release 31/01/2008 3.1 – Pin 33 and 34 now Reserved 11.8 – VAUX is OFF during RESET and Power On period Added table with power consumptions and Supply voltage range Reproduction forbidden without Telit Communications S.p.A.
