Si2435/17FT18 Global Fax ISOmodem-EVB Evaluation Board for the Si2435/17 with a UART Interface Description An onboard rectifier, filter, and voltage regulator allow the power input to be 7.5–13 V ac or dc (either polarity) supplied through a screw terminal (J3) or a standard 2 mm power jack (J4). Alternatively, power can be supplied through the USB interface (whether the USB or RS232 interface is used). The evaluation board can drive an external speaker for call monitoring or the piezoelectric speaker mounted directly on the board. Please note that the PCM interface, parallel interface, and EEPROM are available on the FT only. The Si2435/ 17 devices require a software driver in order to implement fax send/receive functionality. The driver must be compliant with the Si2435/17 and with the applicable ITU-T standards (e.g. T.30, T.31, T.4, and T.6). Contact Silicon Laboratories for details. The global Si2435/17-EVB evaluation board provides the system designer an easy way of evaluating the Si2435/17 Fax ISOmodem®. The Si2435/17-EVB consists of a motherboard with a power supply, an RS232 and USB interface, other ease-of-use features, and a complete removable modem module on a daughter card. (A functional block diagram of the Si2435/17-EVB is shown below.) The Si2435/17 ISOmodem is a complete controller-based modem chipset with an integrated and programmable direct access arrangement (DAA) that meets global telephone line requirements. Available as a combination of one 16-pin small line-side device and one 24-pin system-side device, the Si2435/17 ISOmodem eliminates the need for a separate DSP data pump, modem controller, memories, codec, isolation transformer, relays, optoisolators, and a 2- to 4-wire hybrid. The Si2435/17 is ideal for embedded fax modem applications due to its small board area, controller-based architecture, low power consumption, and global compliance. The Si2435/17-EVB provides an RJ-11 jack (for interfacing the Si2435/17-EVB to the phone line), and USB and RS232 serial ports for interfacing to a PC or host. This allows the ISOmodem to operate as a Class 1 modem for straightforward evaluation of the Si2435/17. To evaluate the Si2435/17 ISOmodem in an embedded system, the daughter card can be used independently of or with the motherboard. A direct access header (JP3) is available on the motherboard to bypass the RS232 transceivers and connect the Si2435/17 Fax ISOmodem directly to a target system. Features The Si2435/17-EVB includes the following: Dual RJ-11 connection to phone line RS-232 and USB interface to PC Piezoelectric speaker for call monitoring Direct access to Si2435/17 for embedded application evaluation Easy power connection to common 7.5 V–13.5 V power supplies or USB port 9 V ac adaptor Support for daisy chain operation with Si3000 voice codec Simple installation and operation Requires a Class A (ITU-T T.31) fax driver Functional Block Diagram PCM Data/ Control 9 V dc at 300 mA ac Adaptor 7.5–13.5 V dc or peak ac Rectifier Filter Voltage Regulator Audio Amplifier Direct Access HDR 3.3 V Daughter Board Boundary 5V USB Connector UART PCM Interboard Connector Audio Out USB I/F DB9 RS-232 Transceivers AOUT Interface Selection Jumpers Si3018* Si2435/17 RESET XTALO Interface Circuit RJ-11 Phone line XTALI Push Button Reset Power-On Reset Rev. 1.0 12/06 Copyright © 2016 by Silicon Laboratories Si2435/17FT18-EVB Si2435/17FT18-EVB 1. Si2435/17-EVB Setup and Evaluation 1.2. Si2435/17-EVB Quick Start (RS-232 Interface) 1. Set jumpers according to Figure 1 or Figure 2. This section explains how to set up the Si2435/17-EVB for evaluation as an RS-232 or USB interface modem. Jumper settings and power connections are given. The initial modem setup after power is applied as well as a basic tutorial on modem operation are provided. Si2435/ 17-EVB configurations for evaluating additional features are discussed separately. See the Si2493/57/34/15 data sheet and “AN244: Si2435/Si2417 Fax Modem Designer’s Guide” for complete details. 2. Connect: DB-9 to PC COM port (with a pass-through cable). to phone line or test box. 9 V ac adaptor (or USB cable). 3. Open the terminal emulator program, and apply power to the EVB. RJ-11 4. Type “AT” followed by a carriage return. (Autobaud automatically adjusts modem DTE speed and protocol.) The modem should echo “AT” and then send the “OK” response code. 1.1. Jumper Settings Check all jumper settings on the Si2435/17-EVB before applying power. The standard factory jumper settings are shown in Figure 1. These settings configure the Si2435/17-EVB for RS-232 serial operation with autobaud. Any terminal emulator program configured to communicate through a PC COM port can be used to communicate with the Si2435/17-EVB. Note: Although the user can exercise many of the Si2435/17 commands (including voice features) using a terminal emulator program, a fax driver is required to implement fax send/receive functionality. The standard factory jumper settings for USB operation are shown in Figure 2. The only difference between RS232 and USB jumper settings is that JP5 must be installed to enable USB. 1.3. Si2435/17-EVB Quick Start (USB Interface) 1. Set jumpers according to Figure 2 or Figure 3. 2. Connect: USB cable to PC to phone line or test box 3. Download USB driver for your operating system from the CD supplied with the evaluation board. RJ-11 4. Install driver. 5. Open the terminal emulator program. 6. Manually reset the EVB. 7. Type “AT” followed by a carriage return. (Autobaud automatically adjusts modem DTE speed and protocol.) The modem should echo “AT” and then send the “OK” response code. Figure 1. Standard Factory Jumper Settings—RS-232 Interface (Outlined in Gray) (FT Option) 2 Rev. 1.0 Si2435/17FT18-EVB Figure 2. Standard Factory Jumper Settings—USB Interface (Outlined in Gray) Figure 3. Standard Factory Jumper Settings—USB Interface (Outlined in Gray) (FS Option) Rev. 1.0 3 Si2435/17FT18-EVB 1.4. Power Requirements 2.1. Motherboard The Si2435/17-EVB has an onboard diode bridge, filter capacitor, and voltage regulator (U1). Power can be supplied from any source capable of providing 7.5 V– 13 V dc or 7.5 V–13 V peak ac and at least 100 mA. (Additional current may be required if a speaker is connected for monitoring call progress tones.) Power may be applied to the Si2435/17-EVB through the screw terminals (J3), the 2 mm power jack (J4), or the USB cable (even if the modem is configured for RS-232 operation). The onboard full-wave rectifier and filter ensure the correct polarity is applied to the Si2435/17EVB. Daughter card power is supplied through voltage regulator U2 by connecting JP7, pins 1 and 2. Daughter card current can be measured by connecting an ammeter between JP7, pins 1 and 2. Failure to connect pins 1 and 2 of JP7 through either a jumper or a lowimpedance ammeter may result in damage to the Si2435/17-EVB. The motherboard provides a convenient interface to the Si2435/17 DC (daughter card). The versatile power supply allows for a wide range of ac and dc voltages to power the board. RS-232 transceivers and a DB9 connector allow the Si2435/17-EVB to be easily connected to a PC or other terminal device. Jumper options allow direct access to the LVCMOS/TTL level serial inputs to the Si2435/17, bypassing the RS-232 transceivers or USB interface. This is particularly useful for directly connecting the Si2435/17 to embedded systems. 1.5. EVB Part Numbers The Fax ISOmodem® evaluation boards are offered in multiple speeds. The first four numbers indicate the system-side device. The options are Si2435 for speeds up to V.34 or Si2417 for speeds up to V.17. The next two letters indicate the system-side package FT–Leadfree, 24-pin TSSOP). The final two numbers indicate the line-side device. See Figure 4. Si2435FT18-EVB LS Part Number (Si3018) SS Package SS Part Number (Si2435 or Si2417) Figure 4. EVB Part Number Example 2. Si2435/17-EVB Functional Description The Si2435/17-EVB is a multipurpose evaluation system. The modem daughter card illustrates the small size and few components required to implement an entire controller-based modem with global compatibility. The daughter card can be used independently of, or in conjunction with, the motherboard. The motherboard adds features that enhance the ease of evaluating the many capabilities of the Si2435/17 Fax ISOmodem. 4 The Si24xxURT-EVB motherboard connects to the daughter card through two connectors, JP1 and JP2. JP1 is an 8x2 socket providing connection to all Si2435/ 17 digital signals and regulated 3.3 V power for the Si2435/17. The Si2435/17 digital signals appearing at JP1 (daughter card interface) are LVCMOS and TTL compatible. The Si2435/17 daughter card must be powered by 3.3 V. The motherboard is factory configured for 3.3 V with JP7. JP2 is a 4x1 socket providing connection between the daughter card and the RJ-11 phone jack. 2.1.1. Voltage Regulator/Power Supply The input voltage to either J3 or J4 must be between 7.5 and 13.5 V dc or 7.5 and 13.5 VPEAK ac. The motherboard includes a diode bridge (D1–D4) to guard against a polarity reversal of the dc voltage or to rectify an ac voltage. The power source must be capable of continuously supplying at least 100 mA. C6 serves as a filter cap for an ac input. The voltage regulator, U1, provides 5 V for the motherboard and the input for voltage regulator U2, which outputs 3.3 V for use on the motherboard and to power the daughter card. Si24xxDC power consumption can be measured by placing a meter between pins 1 and 2 of JP7. The connection between JP7 pins 1 and 2 must be made at all times when power is applied to the evaluation board either through a jumper block or a low-impedance meter to avoid damage to the daughter card. Power is supplied to U2 through D5 from the USB. 2.1.2. Reset Circuitry The Si2435/17 requires a reset pulse to remain low for at least 5.0 ms after the power supply has stabilized during the powerup sequence or for at least 5.0 ms during a power-on reset. Most production Si2435/17 modem chipset applications require that RESET be controlled by the host processor. Certain Si2435/17 operation modes, including powerdown, require a hardware reset to recover. Rev. 1.0 Si2435/17FT18-EVB The Si2435/17-EVB contains two reset options, an automatic power-on reset device, U3 (DS1818) (default), and a manual reset switch (S1) to permit resetting the chip without removing power. A reset, regardless of the mechanism, causes all modem settings to revert to factory default values. See Figure 10 on page 13 and Figure 12 on page 15 for the reset circuit schematic. Table 1. Interface Selection Jumpers Jumper 2.1.3. DS1818 The DS1818 is a small, low-cost device that monitors the voltage on VD and an external reset pushbutton. If VD drops below 3.0 V, the DS1818 provides a 220 ms active-low reset pulse. On powerup, the DS1818 also outputs an active low reset pulse for 220 ms after VD reaches 90% of the nominal 3.3 V value. The DS1818 outputs a 220 ms reset pulse any time the power supply voltage exceeds the 3.3 V ±10% window. Function JP1 Daughter Card Digital Connector. JP2 Daughter Card Phone Line Connector. JP3 Direct Access Header. JP4 PCM Interface. JP5 USB Enable (RS-232 Disable). JP6 Options. JP7 3.3 V Power for Daughter Card. JP8 Disable both RS-232 and USB. JP9 Autobaud disable. JP10 N/A JP11 Enable 27 MHz Clock option. 2.1.4. Manual Reset JP12 Not used. The manual reset switch (S1) performs a power-on reset. This resets the Si2435/17 to factory defaults without turning off power. If S1 is used in conjunction with U3, pressing S1 activates the reset monitor in the DS1818 and produces a 220 ms active low reset pulse. JP13 Onboard speaker enable. 2.1.5. Interface Selection The serial interface of the Si2435/17-EVB can be connected to a computer, terminal, embedded system, or any other data terminal equipment (DTE) via a standard RS-232 interface, USB interface, or through a direct TTL serial interface. Jumper settings determine how the Si2435/17-EVB is connected to the DTE. Table 1 lists the interface controlled by each motherboard jumper. See Figure 11 on page 14 and Figure 21 on page 24. 2.1.6. RS-232 Interface This operation mode uses the standard factory jumper settings illustrated in Figure 1 on page 2. The Maxim MAX3237 transceiver interfaces directly with the TTL levels available at the serial interface of the Si2435/17 and, using internal charge pumps, makes these signals compatible with the RS-232 standard. The RS-232 transceiver on the Si2435/17-EVB can communicate at rates between 300 bps and 1 Mbps. This simplifies the connection to PCs and other data terminal equipment (DTE). The signals available on the Si2435/17-EVB serial interface (DB9 connector) are listed in Table 2. 2.1.7. USB Interface The USB cable connects to J5 on the motherboard and provides both data and power. Installing a jumper on JP5 enables the USB interface and disables the RS-232 interface. The USB interface is provided by U5. A USB driver for this chip is available for most PC and MAC operating systems on the CD. 2.1.8. Direct Access Interface The motherboard supplies power through J3, J4, or USB, power-on reset, and an RJ-11 jack for the modem. The direct access interface (JP3) is used to connect the motherboard to an embedded system. JP3 provides access to all Si2435/17 signals available on the daughter card. It is necessary to install a jumper on JP8 to disable both the RS-232 and USB interface and prevent signal contention. Leave the jumper between JP7 pins 1 and 2. Figures 5 and 7 illustrate the jumper settings required for the direct access mode using the motherboard. Rev. 1.0 5 Si2435/17FT18-EVB 2.1.9. PCM Interface The Si2435/17 PCM interface is available on JP4. Table 3 lists the pin connections for JP4 designed to connect directly to the Si3000SSI-EVB JP6. Table 2. DB9 Pin Connections J1 Name J1 Symbol J1 Pin Si2435/17 Pin Si2435/17 Name See note DCD/EESD * Carrier Detect CD 1 Received Data RXD 2 9 RXD Transmit Data TXD 3 10 TXD Data Terminal Ready DTR 4* See note ESC/RI Signal Ground SG 5 6 GND Data Set Ready DSR 6* See note INT/AOUT Ready to Send RTS 7* See note RTS/RXCLK Clear to Send CTS 8 11 CTS RD 9* 17 RI Ring Indicator *Note: JP6 jumper option. Table 3. JP 4 PCM Interface Pin Connections 6 JP 4 Pin Board Signal Si24xx Pin Si24xx Signal 1 CLKOUT_H 3 CLKOUT 2 TXCLK_H 4 FSYNC 3 GND 6, 20 GND 4 GND 6, 20 GND 5 RXCLK_H 24 SDO 6 EESD_H 18 SDI 7 RESETb 12 RESET* 8 3.3 V 5, 21 VD3.3 9 GND 6, 20 GND 10 VCC (+5 V) Rev. 1.0 Si2435/17FT18-EVB Figure 5. Jumper Settings for Direct Access Interface The block diagram in Figure 6 shows how the two evaluation boards are connected to demonstrate voice mode operation. Si3000SSI-EVB Motherboard Si3000 Daughterboard JP5 1 2 J 3 Speaker Mic SW2 Line In Leave J3 unconnected. Power is provided through JP 6 connector. J6 of Daughterboard Line J Out 6 12 V GND External +12 V Supply JP4 JP4 RJ11 SW3 2 1 JP6 Note M1 and M0 jumper settings. Direct Connection Si24xxFT18-EVB JP4 J4 RS232 Power Adapter Si24xx-DC RJ11 COM 1 Windows PC® Figure 6. Connection Block Diagram for Si3000SSI-EVB and Si24XXURT-EVB Rev. 1.0 7 Si2435/17FT18-EVB 2.1.10. Voice Mode See “AN244: Si2435/Si2417 Fax Modem Designer’s Guide” for details. Figure 7 shows the actual circuit connection between the Si2435/17 and the Si3000. VDD C52 5 21 C50 U3 VD3.3 VD3.3 NOTE: D6 (PIN 4) MUST NOT HAVE PULLDOWN RESISTOR 24 23 22 15 4 SDO/D5 DCD/D4 ESC/D3 AOUT/INT FSYNC/D6 INTb RIb 16 17 18 INT/D0 RI/D1 SDI/D2 CLKOUT/A0 C1A 14 C1A RTSb RXD TXD CTSb 8 9 10 11 RTS/D7 RXD/RD TXD/WR CTS/CS C2A 13 C2A RESETb 12 RESET 1 XTALI XTALO 2 XTALO 6 20 7 19 3 CLKIN/XTALI GND GND VDA VDB DCDb ESC AOUT Si2435/17 VDD C51 R61 C53 C66 0 C68 0.1 uF 0.1 uF SPKR_R 1 SPKR_R MIC_BIAS 2 MIC_BIAS HDST 3 HDST 4 SDI VA 13 5 SDO VD 12 6 FSYNC LINEI 11 LINEI 7 MCLK MIC_IN 10 MIC_IN 8 SCLK RESET 9 VDD R62 47 k R63 47 k SPKR_L 16 SPKR_L LINEO 15 LINEO GND 14 Si3000 Figure 7. Circuit Connection between the Si2435/17 and the Si3000 2.1.11. Audio Output Audio output is provided from the Si2435/17 on the AOUT pin. This signal allows the user to monitor call progress signals, such as dial tone, DTMF dialing, ring, busy signals, and modem negotiation. Control of this signal is provided by AT commands and register settings described in the introduction. The AOUT signal can be connected to an amplifier, such as the LM386 (the default stuffing option on the Si2435/17FT18-EVB), for high-quality output. AOUT can also be connected to a summing amplifier or multiplexer in an embedded application as part of an integrated audio system. 2.1.12. Amplifier (LM386) The audio amplifier circuit consists of U10 (LM386), C20, R3, R4, C21, C22, C23, R5, C24, and an optional loudspeaker, LS1. The LM386 has an internally-set voltage gain of 20. R3 and R4 provide a voltage divider to reduce the AOUT signal in order to prevent 8 overdriving the LM386. C20 provides dc blocking for the input signal and forms a high-pass filter with R3+R4 while R4 and C21 form a low-pass filter. These four components limit the bandwidth of the AOUT signal. C22 provides high-frequency power supply bypassing for the LM386 and should be connected to a hard ground and located very close to the amplifier’s power supply and ground pins. C23 and R5 form a compensation circuit to prevent oscillation of the highcurrent PNP transistor in the LM386 output stage on negative signal peaks. These oscillations can occur between 2 and 5 MHz and can pose a radiation compliance problem if C23 and R5 are omitted. C24 provides dc blocking for the output of the LM386, which is biased at approximately 2.5 V (VCC/2) and forms a high-pass filter with the impedance of the loudspeaker (LS1). The output from the LM386 amplifier circuit is available on the RCA jack, J2 (not installed). Install jumper JP13 to enable the onboard speaker, LS1. Rev. 1.0 Si2435/17FT18-EVB 3. Design 2.2. Modem Module Operation The Si2435/17FT18-EVB daughter card is a complete modem solution perfectly suited for use in an embedded system. The following sections contain the schematics, bill of materials, and layout for the Si2435/17 including the daughter card and motherboard. The daughter card requires a 3.3 V supply capable of providing at least 35 mA and communicates with the system via LVCMOS/TTL-compatible digital signals on JP1. The RJ-11 jack (TIP and RING) is connected via JP2. Be sure to provide the proper power-on reset pulse to the daughter card if it is used in the stand-alone mode. 2.2.1. Reset Requirements The Si2435/17 Fax ISOmodem® daughter card must be properly reset at powerup. The reset pin (pin 8) of the Si2435/17 (JP1, pin 13) must be held low for at least 5.0 ms after power is applied and stabilized to ensure the device is properly reset. 2.2.2. Crystal Requirements Clock accuracy and stability are important in modem applications. To ensure reliable communication between modems, the clock must remain within ±100 ppm of the design value over the life of the modem. The crystal selected for use in a modem application must have a frequency tolerance of less than ±100 ppm for the combination of initial frequency tolerance, drift over the normal operating temperature range, and five year aging. Other considerations, such as production variations in PC board capacitance and the tolerance of loading capacitors, must also be taken into account. 2.2.3. Protection The Si2435/17FT18-EVB meets or exceeds all FCC and international PTT requirements and recommendations for high-voltage surge and isolation testing without any modification. The protection/isolation circuitry includes C1, C2, C8, C9, FB1, FB2, and RV1. The PCB layout is also a key “component” in the protection circuitry. The Si2435/17-EVB provides isolation to 3 kV. Contact Silicon Laboratories for information about designing to higher levels of isolation. Rev. 1.0 9 C54 + VDD 1.3 k R18 C55 FB5 C56 CLKOUT TXCLK RTSb RXD TXD CTSb RESETb 2 4 6 8 10 12 14 16 HEADER 8X2 1 3 5 7 9 11 13 15 JP1 ESC EESD RIb INTb AOUT RXCLK DCDb Rev. 1.0 VDA C2A C2A 13 C53 C1A XTALO XTALO 2 C1A 14 XTALI CLKIN/XTALI 1 U7 Figure 8. Si2435/17 Schematic Si2435/17 12 RESET RESETb RTS/D7 RXD/RD TXD/WR CTS/CS 8 9 10 11 3 CLKOUT/A0 RTSb RXD TXD CTSb CLKOUT SDO/D5 DCD/D4 ESC/D3 AOUT/INT FSYNC/D6 16 INT/D0 17 RI/D1 18 SDI/D2 24 23 22 15 4 INTb RIb EESD RXCLK DCDb ESC AOUT TXCLK VD3.3 VD3.3 GND GND VDA VDB 6 20 7 19 10 5 21 VDD INTb EESD AOUT RIb JP2 DCDb R20 R21 R22 R23 R19 0 C2A C1A These components for internal Silabs use only. RING TIP Si2435/17FT18-EVB C2A C1A R13 R12 R9 Bias C2 C1 C5 C6 10 7 4 6 5 VREG2 VREG IB C2B C1B U2 IGND 15 Rev. 1.0 RX 8 9 1 12 13 16 14 2 3 Si3010/18 RNG1 RNG2 QE QE2 QB DCT2 DCT3 DCT SC C4 R1 + 11 R2 R11 Q4 R4 R8 R7 R5 Q1 Q3 R30, R31, R32, R33, C30 and C31 are an optional CID population Z1 R3 Q2 Hookswitch C10 Figure 9. Si3018 DAA Schematic Ring Detect/CID Q5 DC Term R10 C7 R6 No Ground Plane In DAA Section + D1 C3 - FB1 FB2 C9 C8 R15 R16 TIP RV1 R ING Si2435/17FT18-EVB 11 Si2435/17FT18-EVB 4. Bill of Materials: Si24xx Daughter Card Item 1 2 3 Quantity 2 C2,C1 1 C3 1 C4 Reference Rating Y2 250 V 50 V Tolerance ±20% ±20% ±20% Foot Print 1808 0805 Size A 16 V 50 V Y3 16 V 16 V 16 V 10 V 400 V ±20% ±20% ±10% ±20% ±5% ±20% ±10% 0603 0603 1808 0603 0603 0603 Case A Mini-DIP 0603 2x8 Surface Mount Header, .1 space CONN1X4-100SMT SOT-23 SOT-23 SOT-23 SOD 6 1210 0402 1210 1210 0402 0805 0402 1206 1210 0603 24pin TSSOP 16pin SOIC ATS-SM 4 5 6 7 8 9 10 11 12 13 3 1 2 1 2 1 1 1 2 1 C5,C6,C50 C7 C9,C8 C10 C41,C40 C51 C54 D1 FB1,FB2,FB5 JP1 0.1 uF 2.7 nF 680 pF 0.01 uF 33 pF 0.22 uF 1.0 uF HD04 Ferrite Bead HEADER 8X2 14 1 JP2 4X1 Header_0 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 2 1 2 1 1 1 1 1 2 2 1 1 1 4 1 1 1 Q3,Q1 Q2 Q4,Q5 RV1 R1 R2 R3 R4 R5,R6 R8,R7 R9 R10 R11 R12,R13,R15,R16 U3 U2 Y1 32 1 Z1 Non-installed Components 33 2 C31,C30 34 2 C55,C56 35 1 R18 36 5 R19,R20,R21,R22,R23 37 2 R32,R30 38 2 R33,R31 39 1 C52 40 1 C53 12 Value 33 pF 10 nF 1.0 uF NPN PNP NPN SiDactor 1.07 K 150 3.65 K 2.49 K 100 K 20 M 1M 536 73.2 0 Si24xx Si3018 4.9152Mhz 300 V 300 V 80 V 275 V 1/2 W 1/16 W 1/2 W 1/2 W 1/16 W 1/8 W 1/16 W 1/4 W 1/2 W 1/16 W 100 A ±1% ±5% ±1% ±1% ±5% ±5% ±1% ±1% ±1% ±1% 50 ppm 43 V 20pF load, 150 ESR 1/2 W 120pF 0.1 uF 1.3 k 0 15M 5.1M 0.1 uF 0.22 uF 250 V 10 V 1/16 W 1/16W 1/8 W 1/8 W 16 V 16 V ±10% ±20% ±5% ±5% ±5% ±5% ±20% ±20% Dielectric X7R X7R Al Electrolytic X7R X7R X7R X7R NPO X7R Tant SOD-123 Rev. 1.0 0805 C0603 RC0603 RC0603 0805 0805 0603 0603 X7R X7R X7R X7R Manufacturer Number GA342D1XGF330JY02L C0805X7R251-103MNE NACE1R0M50V Manufacturer Murata Venkel NIC Components C0603X7R160-104MNE C0603X7R500-272MNE GA342QR7GD681KW01L C0603X7R160-103MNE C0603NPO160-330JNE C0603X7R160-104MNE TA010TCM105-KAL HD04-T BLM18AG601S TSM-108-01-T-DV Venkel Venkel Murata Venkel Venkel Venkel Venkel Diodes, Inc. MuRata Samtec 68000-403 Berg MMBTA42LT1 MMBTA92LT1 MMBTA06LT1 P3100SB CR1210-2W-1071FT CR0402-16W-150JT CR1210-2W-3651FT CR1210-2W-2491FT CR0402-16W-104JT CR0805-8W-206JT CR0402-16W-1004FT CR1206-4W-5360FT CR1210-2W-73R2FT CR0603-16W-000F Si3018-F-FS 559-FOXSD049-20 OnSemi OnSemi OnSemi Teccor Venkel Venkel Venkel Venkel Venkel Venkel Venkel Venkel Venkel Venkel Silicon Laboratories Silicon Laboratories CTS Reeves MMSZ43T1 OnSemi C0805X7R251-121KNE C0603C124K CR0603-16W-132JT CR0603-16W-000J CR0805-8W-156JT CR0805-8W-515JT C0603X7R160-104MNE C0603X7R160-104MNE Venkel Kemet Venkel Venkel Venkel Venkel Venkel Venkel Rev. 1.0 1 2 2.1 mm Power jack J4 1 2 1 2 3 4 Power Connector "7-12V AC or DC" J3 M2 M1 SG DTR(i) TXD(i) RXD(o) CD(o) J5 USB Type B 5 9 8 7 6 B3 DB9-RS232_1 J1 RD(o) CTS(o) RTS(i) DSR(o) RS-232 USB 11 10 5 4 3 2 1 V2 V1 USB_+5 SW PUSHBUTTON S1 "RESET" RESETb PowerBlock R1 NI 0 B2 JP7 VCC "Mux off" OE "USB" VD EESD_H "AUTOBAUD" JP9 R10 10k 1 3 5 7 9 11 13 15 JP3 "EEPROM" R11 10k TXCLK_H for JP6 Si2400 only nc or GPIO2 GPIO3 or nc GPIO1 or GPIO3 CLKOUT or nc GPIO4 or AOUT Si2456/57 DCD or EEIO RI or TXCLK ESC or X RTS or RXCLK INT or AOUT 14 13 11 10 8 7 5 4 DC D_H R12 10k "27MHz CLK" JP11 JP6 15 12 9 6 3 Si2401 GPIO2 or nc nc or GPIO5 GPIO3 or nc nc or GPIO1 nc or GPIO4 Place White Dot Silkscreen Near Pin 1 AOUT_H "ESC" "EESD" "RIb" "INT" "AOUT" 2 DC D_H "RXCLK" "DCDb" 1 2 4 6 8 10 HEADER 5X2 "PCM" R28 10k "Si2401 27MHz CLK" JP12 AOUT_H Si2401 Reset Options "JP6: recommended settings" "Si2400: 2-3, 4-5, 8-9, 11-12, 13-14" "Si24xx: 1-2, 4-5, 7-8, 10-11, 13-14" "Si2401: 1-2, 5-6, 7-8, 11-12, 14-15" "Si24xx alt: 1-2, 5-6, 7-8, 11-12, 14-15" Table on silkscreen RS-232 Function Info CD Info RI Ctrl DTR Ctrl RTS Info DSR JP10 2 4 6 8 10 12 14 16 R2 HEADER 8X2 Place White Dot Silkscreen Near Pin 1 "CLKOUT" TXCLK_H "TXCLK" "RTSb" "RXD" "TXD" "CTSb" "RESETb" RESETb Si24xx Reset Options JP5 DSR_M RTS_M DTR_M RI_M CD_M RXD_M TXD_M CTS_M UART Mux RESETb 1 3 5 7 9 R6 R7 B5 AOUT +3.3V Speaker B6 ESC_H EESD_H RI_H INT_H AOUT_H RXCLK_H DCD_H CLKOUT_H TXCLK_H RTS_H RXD_H TXD_H CTS_H RESET_H 0 0 +3.3V VCC SPEAKER C32 0 SDO JP13 J2 VCC "EEPROM" HOLD WP CS SCLK SDI RCA JACK NI 8 7 3 1 6 5 U9 R27 RING TIP Daughter Card Socket EESD_H EECS_H EECLK_H EESD_H RESET Right angle connector on board edge JP4 Figure 10. Motherboard Top-level Schematic JP7 for measuring current to modem (i.e. VD goes to modem only) R8 1.3k JP8 RI_U RI_U DTR_U DTR_U CD_U DSR_U CD_U RTS_U DSR_U CTS_U CTS_U RTS_R TXD_U TXD_U RI_T RI_T RXD_U CD_T DTR_T DSR_T RTS_T CTS_T TXD_T RXD_T RXD_U VD +3.3V USB USBUSB+ B4 CD_T DTR_T DSR_T RTS_T CTS_T TXD_T RXD_T RS-232 RD_R CTS_R RTS_R DSR_R B1 S DTR_R TXD_R RXD_R CD_R 2 R9 0 "TIP" TP7 "RING" TP8 1 2 3 4 5 6 7 8 9 10 11 12 Speaker LS1 RJ11 Si2435/17FT18-EVB 13 14 C1 1.0 uF VD + FB2 C2 C3 470 pF 1.0 uF CLKOUT_H TXCLK_H RTS_H RXD_H TXD_H CTS_H RESET_H EECS_H R26 1.3k 2 4 6 8 10 12 14 16 C4 470 pF SOCKET 8X2 1 3 5 7 9 11 13 15 JP1 Place White Dot Silkscreen Near Pin 1 Rev. 1.0 Si2401 NC GPIO1 GPIO5 GPIO2 NC GND RXD GPIO3 TXD NC CTS NC RESET NC VD GPIO4 JP2 RING TIP TIP and RING minimum 20 mils wide and as far as possible from ground. Connectors for ISOModem module. ESC_H EESD_H RI_H INT_H AOUT_H RXCLK_H DCD_H EECLK_H Figure 11. Daughter Card Interface Schematic Table NOT on silkscreen JP1/3 Si24xx Si2400 1 NC CLKOUT/A0 2 NC SDO/D5 FSYNC/D6 3 NC NC DCD/D4 4 RTS/D7 5 CLKOUT GND GND 6 RXD/RD RXD 7 ESC/D3 GPIO1 8 TXD/WR TXD 9 SDI/D2 GPIO2 10 CTS/CS CTS 11 RI/D1 GPIO3 12 RESET RESET 13 INT/D0 GPIO4 14 VD 15 VD AOUT/INT 16 AOUT Net names correspond to Si24xx. See table for Si2400 equivalents + R17 10k VD Si2435/17FT18-EVB V2 V1 D2 D4 D1 D3 + C6 470 uF C7 0.1 uF 1 IN U1 Rev. 1.0 TP6 TP5 TP4 TP3 Standoffs in each corner of board. 1.6 R13 USB_+5 1 2 7805 "GND" "GND" "GND" C8 10 uF D5 C9 0.1 uF BAT54C VCC 4 3 2 1 U2 FB/NC OUT(2) OUT(1) TPS77601DR IN(2) IN(1) EN GND RESET/PG TP16 "+5V" 5 6 7 8 R16 110k R14 196k C10 10 uF TP17 "+3.3V" Figure 12. Power Supply Schematic TP18 TP2 TP1 3 FB1 OUT 10 nF C5 GND 2 USB_VCC +3.3V VD C11 470 pF R15 3 2 RST 0 DS1818 GND VCC U3 OPTIONAL 1 RESET Si2435/17FT18-EVB 15 Rev. 1.0 TXD_R RTS_R DTR_R DSR_R RD_R CD_R CTS_R RXD_R D6 MMBZ15VDC D7 MMBZ15VDC D8 MMBZ15VDC D9 MMBZ15VDC MMBZ15VDC D10 MMBZ15VDC D12 + MMBZ15VDC D13 C13 470 pF C14 0.1 uF R31 10k NI R30 10k VCC 1.0 uF + C15 R33 10k R32 10k NI Figure 13. RS-232 Interface Schematic MMBZ15VDC D11 C12 1.0 uF FB3 C17 C16 14 15 11 9 8 12 10 7 6 5 4 27 SHDN MBAUD R3IN R2IN R1IN T5OUT T4OUT T3OUT T2OUT T1OUT V- V+ 26 VCC GND 16 2 VCC MAX3237 EN R3OUT R2OUT R1OUT R1OUTB T5IN T4IN T3IN T2IN T1IN C2- C2+ C1- C1+ U4 13 18 20 21 16 17 19 22 23 24 3 1 25 28 R29 10k TP10 C19 C18 TP11 TXD_T RTS_T DTR_T DSR_T RI_T CD_T CTS_T RXD_T Si2435/17FT18-EVB Si2435/17FT18-EVB VCC R3 3 7 2 AOUT 47 k C21 R4 3k 820 pF - 4 8 0.1 uF + C24 5 + C20 6 1 C22 0.1 uF 1 U10 LM386M-1 C23 2 SPEAKER 100 uF 0.1 uF R5 10 Figure 14. Audio Amplifier Schematic "CTS_U" TP12 "RXD_U" TP13 U7 TXD_U RXD_U RTS_U CTS_U 2 5 11 14 1B1 2B1 3B1 4B1 1A 2A 3A 4A 4 7 9 12 TXD_T RXD_T RTS_T CTS_T 3 6 10 13 1B2 2B2 3B2 4B2 OE S 15 1 TP15 "CTS_T" TP14 "RXD_T" TXD_M RXD_M RTS_M CTS_M VCC R18 10k 74CBT3257/SO S O\E\ U8 DTR_U DSR_U CD_U RI_U 2 5 11 14 1B1 2B1 3B1 4B1 1A 2A 3A 4A 4 7 9 12 DTR_T DSR_T CD_T RI_T 3 6 10 13 1B2 2B2 3B2 4B2 OE S 15 1 DTR_M DSR_M CD_M RI_M R19 10k 74CBT3257/SO Figure 15. UART Mux Schematic Rev. 1.0 17 Si2435/17FT18-EVB USB_VCC U5 C29 1.0 uF + C31 8 VBUS 7 REGIN 6 R20 4.7 k RST 9 SUSPEND 12 SUSPEND 11 RI DCD DTR DSR TXD RXD RTS CTS 2 1 28 27 26 25 24 23 VDD TP19 RI_U 3 GND U11 1 5 5 4 USB- 2 3 DD+ CD_U DTR_U DSR_U TXD_U RXD_U 4 CP2101/02 RTS_R GMS05F USB+ CTS_U Figure 16. USB Interface Schematic 18 Rev. 1.0 Si2435/17FT18-EVB 5. Bill of Materials: Si24xx Motherboard Reference C1,C3,C12,C15,C29 C2,C4,C11,C13 C5 C6 C7,C9 C10,C8 C14,C16,C17,C18,C19,C2 0,C22,C23,C31,C32 C21 C24 D1,D2,D3,D4 D5 D6,D7,D8,D9,D10,D11,D1 2,D13 FB1,FB2,FB3 JP1 JP2 JP3 JP4 Value 1.0 uF 470 pF 10 nF 470 uF 0.1 uF 10 uF 0.1 uF Rating 10 V 25V 16 V 25 V 25 V 16V 16 V Tolerance ±10% ±5% ±10% ±20% ±10% ±10% ±20% 820 pF 100 uF DIODE BAT54C MMBZ15VDC 50 V 16 V 30 V ±5% ±10% 0.5 A Item 1 2 3 4 5 6 7 Quantity 5 4 1 1 2 2 10 8 9 10 11 12 1 1 4 1 8 13 14 15 16 17 3 1 1 1 1 18 8 19 20 21 1 1 1 JP5,JP7,JP8,JP9,JP10,JP 11,JP12,JP13 JP6 J1 J2 22 1 J3 23 1 J4 24 25 26 27 28 29 30 31 32 1 1 1 6 1 1 1 2 10 33 34 35 36 37 1 1 1 1 1 38 39 40 3 4 8 41 42 43 44 45 46 2 1 1 1 1 1 2.1 mm Power jack J5 USB Type B LS1 Speaker RJ11 MTJG-2-64-2-2-1 R2,R6,R7,R9,R15,R27 0 R3 47 k R4 3k R5 10 R26,R8 1.3k R10,R11,R12,R17,R18,R1 10k 9,R28,R29,R30,R33 R13 1.6 R14 196k R16 110k R20 4.7 k S1 SW PUSHBUTTON TP1,TP2,TP18 Black Test Point TP3,TP4,TP5,TP6 Stand off TP7,TP8,TP10,TP11,TP12, Blue Test Point TP13,TP14,TP15 TP16,TP17 Red Test Point TP19 Blue Test Point U1 7805 U2 TPS77601DR U3 DS1818 U4 MAX3237 47 48 49 50 51 1 2 1 1 1 U5 U8,U7 U9 U10 U11 Foot Print 3216_EIAA CC0805 CC0603 C5X10MM-RAD CC0805 CC1206 CC0603 Dielectric Tant X7R X7R Electrolytic X7R X7R X7R Manufacturer Number TA010TCM105-KAL C0805C471J5GACTU C0603X7R160-103KNE UVX1E471MPA C0805X7R250-104KNE C1206X7R100-106KNE C0603X7R160-104MNE Manufacturer Venkel TTI Venkel NIC Components Venkel Venkel Venkel CC0805 NPO C2.5X6.3MM-RAD Electrolytic SOD123 SOT-23 SOT-23 C0805COG500-821JNE UVX1C101MEA1TD MBR0530T1 BAT54C MMBZ15VDC Venkel Nichicon Motorola Diodes Inc. General Semiconductor Ferrite Bead SOCKET 8X2 4X1 Socket HEADER 8X2 HEADER 5X2 RC0805 CONN2X8 CONN4[6238] CONN2X8 CONN2X5[6238]RA BLM21A601S SSW-108-01-T-D SSW-104-01-T-S 517-6121TN TSW-105-25-T-D-RA Murata Samtec Samtec Samtec Samtec 2X1 Header CONN2[6040] 517-611TN Berg 3x5 Header DB9-RS232_1 RCA JACK CONN3X5 CONN9[6543]DBF CONN2[12090]RC A TB2[12065]TSA K22-E9S-030 16PJ097 Kycon Mouser 506-5ULD02 Mouser Power Connector CP2101/02 74CBT3257/SO PDIP Socket OP-AMP GMS05F 1/10 W 1/10 W 1/10 W 1/10 W 1/16 W 1/16 W ±5% ±5% ±1% ±5% ±5% 1/8 W -0.05 1/10 W ±5% CONN3[175120]P WR CONN-USB-B HCM12A[9052] RJ11[6238]DUAL RC0603 RC0805 RC0805 RC0805 RC0603 RC0603 ADC-002-1 Adam Tech 897-30-004-90-000000 HCM1206A MTJG-2-64-2-2-1 CR0603-10W-000JT NRC10J473TR NRC10J302TR NRC10F10R0TR CR0603-16W-132JT CR0603-16W-103JT Mill-Max JL World Adam Tech Venkel NIC Components NIC Components NIC Components Venkel Venkel RC1206 RC0805 RC0805 RC0805 SW4[6240]PB CR1206-8W-1R6JT MCHRIDEZHFX1963E CR21-114J-T NRC10J472TR 101-0161 Venkel Classic Comp Classic Comp NIC Components Mouser CONN1[6040] MH-125 CONN1[6040] 151-203 Mouser 151-205 Mouser CONN1[6040] CONN1[6040] TO-220-LD SO8 SOT-23 SOP65X780-28N 151-207 151-207 uA7805CKC TPS77601DR DS1818-10 MAX3237E (Sipex SP3238E 2nd source) CP2101/02 SN74CBT3257DBR 210-93-308-41-001000 LM386M-1 GMS05F Mouser Mouser Texas Instruments Texas Instruments Dallas Semiconductor Maxim 28-pin MLP SOP65X780-16N DIP8-SKT SO8 SOT-23-5N Rev. 1.0 Silicon Laboratories Texas Instruments Mill-Max National Semi Vishay 19 Figure 17. Daughter Card Component Side Silkscreen Si2435/17FT18-EVB 20 Rev. 1.0 Figure 18. Daughter Card Solder Side Silkscreen Si2435/17FT18-EVB Rev. 1.0 21 Figure 19. Daughter Card Component Side Layout Si2435/17FT18-EVB 22 Rev. 1.0 Figure 20. Daughter Card Solder Side Layout Si2435/17FT18-EVB Rev. 1.0 23 Figure 21. Motherboard Silkscreen Si2435/17FT18-EVB 24 Rev. 1.0 Figure 22. Motherboard Silkscreen (Back Side) Si2435/17FT18-EVB Rev. 1.0 25 Figure 23. Motherboard Component Layout Si2435/17FT18-EVB 26 Rev. 1.0 Figure 24. Motherboard Solder Side Layout Si2435/17FT18-EVB Rev. 1.0 27 Figure 25. Motherboard Ground Plane Layout Si2435/17FT18-EVB 28 Rev. 1.0 Figure 26. Motherboard Power Plane Layout Si2435/17FT18-EVB Rev. 1.0 29 Si2435/17FT18-EVB 6. Complete Design Package on CD (See Sales Representative for Details) Silicon Laboratories can provide a complete design package of the Si2435/17-EVB including the following: OrCad Schematics Gerber Files BOM Documentation Please contact your local sales representative or Silicon Laboratories headquarters sales for ordering information. 30 Rev. 1.0 Si2435/17FT18-EVB NOTES: Rev. 1.0 31 Smart. Connected. Energy-Friendly Products Quality Support and Community www.silabs.com/products www.silabs.com/quality community.silabs.com Disclaimer Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. 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