2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ ABX8X5 Real Time Clock Family The ABX8XX Evaluation Kit provides all of the tools needed to assess the complete feature set in the ultra-low power AB08X5 and AB18X5 product families. The ABX8XX EVK is designed for easy integration via an I2C or SPI serial interface with microcontroller development kits or with custom boards. The ABX8XX EVK may be used for both initial evaluation and product development. This document provides an overview of the ABX8XX EVK and serves as a user’s guide for fast setup. An image of the EVK development board is shown below. The ABX8XX EVK Development Board The versions of the ABX8XX EVK utilize the same printed circuit board but have different population options and support either I2C or SPI bus communication. The ABX8XX-I2C -EVK supports I2C communication. The ABX8XXSPI-EVK supports SPI communication. The orderable part numbers are as follows: Orderable Part Number ABX8XX-I2C-EVK ABX8XX-SPI-EVK AB18X5 Device AB1805 AB1815 Notes I2C EVK Version SP EVK Version The ABX8XX-I2C-EVK and ABX8XX-SPI-EVK versions are populated with the AB1805 and AB1815 devices, respectively ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (1) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Table of Contents Kit Contents..................................................................................................................................................................... 3 ABX8XX EVK Overview ............................................................................................................................................... 3 Component Locations...................................................................................................................................................... 5 Connector Pin-outs and Probe Points .............................................................................................................................. 9 VCC and VBAT Current Measurements with SW1 and SW2 ...................................................................................... 12 VBAT Backup Power .................................................................................................................................................... 13 External 32kHz Clock ................................................................................................................................................... 13 Debug LED ................................................................................................................................................................... 13 Installation Guide .......................................................................................................................................................... 13 9.1. Hardware Setup .............................................................................................................................................. 13 9.2. Hardware Setup .............................................................................................................................................. 14 9.3. Measuring Current Consumption of the ABX8XX EVK ............................................................................... 14 9.4. Measuring Frequency Accuracy of the ABX8XX EVK ................................................................................ 16 Schematics and Component List ................................................................................................................................... 17 Component Installation Differences .............................................................................................................................. 24 Notes.............................................................................................................................................................................. 25 ABRACON LLC – TERMS & CONDITIONS OF SALE ........................................................................................... 25 Table of Tables Table 1. Top Side Board Component Descriptions ........................................................................................................ 5 Table 2. Bottom Side Board Component Descriptions................................................................................................... 7 Table 3. 24-pin (2x12) Connector Pin Names and Descriptions .................................................................................. 10 Table 4. ABX8XX-I2C-EVK Component List ............................................................................................................ 22 Table 5. ABX8XX-SPI-EVK Component List ............................................................................................................. 23 Table 6. Component Installation Differences ............................................................................................................... 24 Table of Figures Figure 1 AB18X5 EVK Block Diagram......................................................................................................................... 4 Figure 2. EVK Board Top Side Components ................................................................................................................. 5 Figure 3. EVK Board Bottom Side Components ........................................................................................................... 6 Figure 4. Top Component Locations .............................................................................................................................. 7 Figure 5. Bottom Component Locations ........................................................................................................................ 8 Figure 6. 24-pin Header connector Pin-out .................................................................................................................... 9 Figure 7. 5 x 5 Test point Array Pin-out ....................................................................................................................... 11 Figure 8. VCC and VBAT Current Measurement ........................................................................................................ 12 Figure 9. ABX8XX-I2C-EVK Schematic Page 1 ........................................................................................................ 18 Figure 10. ABX8XX-I2C-EVK Schematic Page 2 ...................................................................................................... 19 Figure 11. ABX8XX-SPI-EVK Schematic Page 1 ....................................................................................................... 20 Figure 12. ABX8XX-SPI-EVK Schematic Page 2....................................................................................................... 21 ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (2) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 1. Kit Contents The items included in the ABX8XX EVK kit are listed below. · Welcome letter · One ABX8XX SPI or I2C EVK development board. - ABX8XX-I2C-EVK with I2C interface - ABX8XX-SPI-EVK with SPI interface · USB flash-drive containing the following documentation. - ABX8XX Evaluation Kit User’s Guide (this document) - AB08X5 Real Time Clock Family Datasheet - AB18X5 Real Time Clock Family with Power Management Datasheet - PCB Component Assembly Drawing - Searchable PDF file - PCB Layout Gerber Files - PCB Schematics - Searchable PDF file - AB18X5 Family System Power Management Application Note - ABX8X5 Using Low-Cost Ceramic Capacitors for RTC backup Application Note - Compiled and Tested C Code Driver Functions for the AB18X5 RTC Family - ABX8X5 Product Highlights 2. ABX8XX EVK Overview The ABX8XX EVK should be used with a host microcontroller (e.g., a microcontroller development kit or an existing production system) to control memory reads and writes over the I2C or SPI serial interface. All operations can be initiated over the serial interface including setting time, reading time, setting alarms and timers, clearing alarms and timers, and other functions described in the datasheet documents “AB08X5 Real Time Clock Family” and “AB18X5 Real Time Clock Family with Power Management.” In addition to serial interface access, the EVK provides access to all input and output signals on the AB18X5. These signals can be set or read by the host microcontroller unit (MCU) or any other component in the system. The AB18X5 RTC family members support either the I2C or SPI serial interface as well as different I/O and power management features. The EVK also provides test points for making analog measurements. A pico-ammeter can be inserted in series with the VCC and VBAT supply voltages or between the PCB current measurement test points to measure the ultra-low current consumption in each of the oscillation modes. Additionally, a high accuracy frequency counter can be used to measure frequency stability over extended periods under different calibration settings. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (3) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Figure 1 shows a block diagram of a typical EVK use case. Figure 1 AB18X5 EVK Block Diagram Access to all AB18X5 pins is provided by a 24-pin expansion header connector with 2mm x 2mm pin spacing. The EVK board also comes with 2-pin VCC and VBAT current measurement pins as shown in Figure 2. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (4) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 3. Component Locations This section describes key EVK board components and their locations on the top and bottom sides of the board. The top side EVK components are labeled in Figure 2 and are described in Table 1. Figure 2. EVK Board Top Side Components Table 1. Top Side Board Component Descriptions Board Component 24-pin header connector Super Capacitor VCC current measurement pins VBAT current measurement pins Description This is the top side of the 24 pin connector used to make power and input/output pin signal connections to the EVK board. This is a 2x12, 2mm pitch connector (see EVK component list for part number). The connector can be used to connect to individual pin headers, ribbon cable connectors, or can be used as a module and plug into a female connector on the host target system. Can be used as the VBAT (backup) supply power source of the AB18X5. These pins are in series with the VCC supply pin of the AB18X5 and are used to connect to an external pico-ammeter for measuring the VCC current into the AB18X5 device. The connection polarity is shown in the diagram. These pins are in series with the VBAT supply pin of the AB18X5 and are used to connect to an external pico-ammeter for measuring the VBAT current into the AB18X5 device. The connection polarity is shown in the diagram. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (5) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Board Component LED SW1 SW2 32.768kHz crystal AB18X5 MMCX footprint Description A separate pin on the 24-pin socket connector connects to the LED. This LED can be controlled by an MCU GPIO pin or can be connected directly to the VCC or VBAT supply to indicate one of the supplies has power applied. This switch is connected in parallel with the VCC current measurement pins. It is used to short across the pins and connect the external VCC supply to the AB18X5 when not measuring current with the picoammeter. This switch is connected in parallel with the VBAT current measurement pins. It is used to short across the pins and connect the external VBAT supply to the AB18X5 when not measuring current with the picoammeter. The crystal is connected to the XI and XO pins of the AB18X5 device I2C (AB1805) or SPI (AB1815) real time clock device. This can be used for providing an external clock input. The bottom side EVK components are labeled in Figure 3 and described in Table 2. Figure 3. EVK Board Bottom Side Components ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (6) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Table 2. Bottom Side Board Component Descriptions Board Component 24-pin socket connect Board serial number Description This is the bottom, male side of the connector used to make power and input/output pin signal connections to the EVK board. This is a 2x12, 2mm pitch connector (see EVK component list for part number). The male side of the connector can be used to connect to individual female socket pins, ribbon cable connectors, or can be used as a module and plug into a 2mm pitch female socket connector on the host MCU system. A unique serial number assigned to each EVK board. The top and bottom component locations and their corresponding reference designators are shown in Figure 4 and Figure 5. A searchable PDF file of the top and bottom board assembly drawings with reference designators is also included in the USB flash drive documentation to allow for quick location of components in the board schematics. Figure 4. Top Component Locations ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (7) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Figure 5. Bottom Component Locations ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (8) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 4. Connector Pin-outs and Probe Points Figure 6 shows the location of the names and numbers each of the pins (pin-out) of the 24-pin header connector. Figure 6. 24-pin Header connector Pin-out ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (9) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Table 3 lists the numbers, names, and descriptions for each pin of the 24-pin (2x12) connector. There are also pull-up resistors on the board from the pin to the VCC_IO supply. Pull-up values are indicated in the table. Table 3. 24-pin (2x12) Connector Pin Names and Descriptions Pin No. Pin Name 1 2 3 4 5 nEXTR nRST WDI CLKOUT GND Board Pull-up Resistor 10k 10k 10k --- 6 FOUT 10k 7 EXTI 10k 8 PSW 10k 9 SPI_nCE/ nTIRQ 10k 10 SPI_MOSI -- 11 SPI_MISO -- 12 SPI_SCK -- 13 GND -- 14 VCC_IO -- 15 I2C_SCL 2.2k 16 I2C_SDA 2.2k 17 VCC_AM_ IMSR -- 18 GND -- Description Connection to the external interrupt input pin (nEXTR) of the AB18X5. Connection to the external reset output pin (nRST) of the AB18X5. Connection to the watchdog timer reset input pin (WDI) of the AB18X5. Connection to the square wave output pin (CLKOUT) of the AB18X5. PCB GND connection. There is a single GND plane net for the PCB. Connection to the primary interrupt output pin (FOUT/nIRQ) of the AB18X5. This pin can also be used to drive the AB18X5 square wave output. Connection to the external interrupt input pin (EXTI) of the AB18X5. Connection secondary interrupt output pin (PSW/nIRQ2) of the AB18X5. It can also drive the square wave output or function as the power switch to power gate external devices. ABX8XX-I2C-EVK board: Connection to the timer output pin (nTIRQ) of the AB18X5. ABX8XX-SPI-EVK board: Connection to the I/O interface SPI chip select input pin (nCE) of the AB18X5. ABX8XX-I2C-EVK board: Not connected. ABX8XX-SPI-EVK board: SPI master out / slave in data signal. Connects to the I/O interface SPI data input pin (SDI) of the AB18X5. ABX8XX-I2C-EVK board: Not connected. ABX8XX-SPI-EVK board: SPI master in / slave out data signal. Connects to the I/O interface SPI data output pin (SD0) of the AB18X5. ABX8XX-I2C-EVK board: Not connected. ABX8XX-SPI-EVK board: Connects to the I/O interface clock pin (SCL) of the AB18X5. It provides the clock input for SPI interface mode. PCB GND connection. There is a single GND plane net for the PCB. This supply connection pin provides power to the board pull-up resistors and temperature sensor IC. The VCC_AM_IMSR and VCC_IO connector pins should be connected to the same voltage level. ABX8XX-I2C-EVK board: Connects to the I/O interface clock pin (SCL) of the AB18X5. It provides the clock input for I2C interface mode. ABX8XX-SPI-EVK board: Not connected. ABX8XX-I2C-EVK board: Connects to the I2C interface data I/O pin (SDA) of the AB18X5. ABX8XX-SPI-EVK board: Not connected. This supply connection pin provides power to VCC supply pin of the AB18X5 through SW1. The VCC_AM_IMSR and VCC_IO connector pins should be connected to the same voltage level. PCB GND connection. There is a single GND plane net for the PCB. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (10) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Pin No. Pin Name Board Pull-up Resistor 19 VBAT_ AM_IMSR -- 20 SUCAP_D IS -- 21 VTEMP -- 22 LED -- 23 24 VSYS VPP_CON --- Description This supply connection pin provides power to VBAT supply pin of the AB18X5 through SW2. It can be used to provide the backup power source to the AB18X5. Super capacitor disconnect signal. This signal can be used to connect/disconnect the super capacitor from the AB18X5 VBAT pin. Additional component population changes are required to use this feature. This is the analog voltage output from the temperature sensor IC on the board. The temperature sensor IC is not populated on the board by default. This pin connects to the debug LED populated on the board through a 510 ohm resistor. Test point Test point A 5 x 5 array of probe points for the AB18X5 device is provided on the EVK board around the perimeter of the device package as shown in Figure 7. This enables users to probe or connect wires to the pins of the AB18X5 device for test and debug. Figure 7. 5 x 5 Test point Array Pin-out ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (11) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 5. VCC and VBAT Current Measurements with SW1 and SW2 The AB18X5 VCC and VBAT supply current can be measured by connecting an ammeter to the VCC and VBAT current measurement pins. The VCC and VBAT current measurement pins and +/- polarity are shown in Figure 2. SW1 is connected across the + and – terminals of the VCC current measurement pins and SW2 is connected across the + and – terminals of the VBAT current measurement pins. SW1 and SW2 are placed in the “open” position by sliding the switch lever to the left side as shown in Figure 8. They are placed in the “closed” position by sliding the switch lever to the right side. When the switch is placed in the “open” position, the VCC/VBAT connection to the AB18X5 device becomes an open circuit. This forces current to flow through the VCC/VBAT current measurements pins and enables current measurement with an ammeter. When the switch is placed in the “closed” position, a short circuit is placed across the terminals of the VCC/VBAT current measurement pins. If an ammeter is still connected, its terminals will also get shorted together. This allows the ammeter to be removed from the VCC/VBAT current measurement pins without losing power to the AB18X5 device. If an ammeter is not connected to the VCC/VBAT current measurement pins, the switch should be placed in the “closed” position to supply power to the AB18X5 device from the 24-pin connector. Figure 8. VCC and VBAT Current Measurement ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (12) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 6. VBAT Backup Power Backup power to the AB18X5 VBAT pin can be provided using the 24-pin connector or the on-board super capacitor. The super capacitor can be connected to the VBAT pin of the AB18X5 by populating 0 ohm resistors or solder shorts across R10 and R16. This will allow continued time keeping, register/memory state retention, etc. should the VCC supply be removed. Information about using the AB18X5 integrated trickle charger to charge the super capacitor can be found in the datasheet document “AB18X5 Real Time Clock Family with Power Management.” 7. External 32kHz Clock An external 32.768 kHz clock can be supplied to the AB18X5 device via the MMCX connector footprint shown in Figure 2. The middle pin of this connector footprint connects to the XO pin of the AB18X5 device. An MMCX connector or other can be soldered to these pins to connect to an external frequency generator. The external clock must not exceed either the VCC supply or 1.8V (maximum input voltage), whichever is less. To connect the MMCX connector to the XO pin of the AB18X5 device, remove the crystal from the board and populate R28 with a 0 ohm resistor or solder short. 8. Debug LED A debug/indicator LED is provided on the board and has an individual pin connection to the 24 pin connector. There is a 510 ohm resistor in series with the LED with the cathode of the LED connected to GND. The LED can be connected directly to the VCC_IO supply to indicate when power is supplied to the board or it can be connected to an MCU GPIO pin. 9. Installation Guide 9.1. Hardware Setup 1. Begin with the ABX8XX EVK and HC development boards powered down. 2. For the ABX8XX-I2C-EVK, connect the I2C_SDA (pin 16) and I2C_SCL (pin 15) pins on the EVK 24 pin connector to the SDA and SCL pins on the HC development board. For the ABX8XX-SPIEVK, connect the SPI_SCK (pin 12), SPI_MISO (pin 11), SPI_MOSI (pin 10) and SPI_nCE/nTIRQ (pin 9) pins on the EVK connector to the corresponding pins on the HC development board. 3. Connect any other digital inputs/outputs of interest on the ABX8XX EVK development board connector to GPIO pins on the HC. 4. Connect the VCC, VBAT (if applicable), and VSS pins on the EVK connector to appropriate supply voltages. The VCC supply voltage should be connected to both VCC_AM_IMSR (pin 17) and VCC_IO (pin 14) (see Figure 6). The VBAT supply voltage should be connected to VCC_AM_IMSR (pin 19). The HC VCC and AB18X5 VCC supplies should be the same voltage. 5. Power up the ABX8XX EVK and HC development boards. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (13) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 9.2. Hardware Setup The ABX8XX EVK does not require any host PC software installation but does require minimal driver development for the HC. All drivers are simple sequences of I2C or SPI register writes. Detailed information on each register in the ABX8X5 products can be found in the datasheet documents titled, “AB08X5 Real Time Clock Family” and “AB18X5 Real Time Clock Family with Power Management.” C language driver code and functions for the ABX8X5 RTC family are included in separate files on the USB flash drive titled “ABX8X5.c” and “ABX8X5.h”. These ABX8X5 C language driver functions were compiled and tested using TI Code Composer Studio version 5.2.1 for the MSP430G2553 processor. They can be used to evaluate the features of the ABX8X5 RTC. The customer may choose to substantially reduce the size of the driver functions dependent upon MCU code space requirements and the ABX8X5 features being used. The MCU C functions below are used in the ABX8X5.c file. The implementation of these functions will be specific to the processor being used in the application. The customer should develop these driver functions for their target MCU. Below are the function prototypes. // I2C Interface Functions void mcu_i2c_write(uint8_t num_bytes, uint8_t addr, uint8_t * data); void mcu_i2c_read(uint8_t num_bytes, uint8_t addr, uint8_t * data); void mcu_i2c_init(uint8_t slave_addr); // SPI Interface Functions void mcu_spi_init(void); void mcu_spi_read(uint8_t num_bytes, uint8_t addr, uint8_t * data); void mcu_spi_write(uint8_t num_bytes, uint8_t addr, uint8_t * data); num_bytes = # of bytes to read or write to the ABX8X5 addr = ABX8X5 register or memory address * data = pointer to the first byte of data in the array or the address of the array containing the read/write data. 9.3. Measuring Current Consumption of the ABX8XX EVK To measure current draw on the ABX8XX EVK, an ammeter must be inserted in series with the AB18X5 part, and the part must then be put into a desired oscillation state. Listed below are the steps required to measure current through the AB18X5 VCC pin in the most energy-efficient setting in crystal (XT) oscillation and RC oscillation modes. 1. Complete Steps 1-4 in Section 9.1. 2. Connect an ammeter in series with the VCC pin on the AB18X5 part. This is done most easily by first connecting an ammeter between the VCC current measurement pins (see Figure 8). Power on the ammeter and set it to a range setting capable of measuring mA or tens of mA. To measure positive current, the ammeter polarity should be connected following the VCC Current Measurement polarity markers (+/-) shown in Figure 2. Once the ammeter is connected, change the position of SW1 to the open position (see Figure 8). 3. Power up the ABX8XX EVK and HC development boards. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (14) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 4. Issue a series of commands to place the AB18X5 part in a typical low current oscillation state. The examples here use the I/O access functions readreg and writereg described in the pseudo code. a. Set the OUT bit (register 0x10 bit 4) to 1 and the OUT1S field (register 0x11 bits [1:0]) to 0 to ensure the FOUT pin is high and not drawing current through the pull-up resistor. Set the OUTB bit (register 0x10 bit 5) to 1 and the OUT2S field (register 0x11 bits [4:2]) to 0 to ensure the OUT2 pin is high and not drawing current through the pull-up resistor. Set the RS1E bit (register 0x11 bit 5) to 0 to disable the external reset input. This should force the nRST pin to be high and not draw current through the pull-up resistor. temp = readreg(0x10) writereg(0x10, temp | 0x30) temp = readreg(0x11) writereg(0x11, temp & 0xC0) // Read the Control1 Register // Set the OUT and OUTB bits // Read the Control2 Register // Set the OUT1S, OUT2S and RS1E fields to 0 b. Set the IM field (register 0x12 bits [6:5]) to 0x3. This will minimize the current drawn by the alarm interrupt pulse generator. temp = readreg(0x12) writereg(0x10, temp | 0x60) // Read the Interrupt Mask Register // Set the IM field to 0x3 c. Set the TE bit low and the TFS field to 0x3 by writing the value 0x03 to register 0x18. This will minimize internal current drawn by the Countdown Timer and ensure the OUT3 pin is high and not drawing current through the pull-up resistor. writereg(0x13, 0x03) // Set the TE bit to 0 and the TFS field to 0x3 d. Set the SQWE bit (register 0x13 bit 7) to 0 to disable the output square wave generator and ensure that the OUT4 pin is not toggling. temp = readreg(0x13) writereg(0x13, temp & 0x7F) // Read the SQW Register // Set the SQWE bit to 0 e. To observe the current with the Crystal oscillator running, set the OSEL bit (register 0x1C bit 7) to 0. Note that register 0x1F MUST be written with the value 0xA1 prior to any attempt to modify register 0x1C. temp = readreg(0x1C) // Read the Oscillator Control Register writereg(0x1F, 0xA1) // Load the Configuration Key Register with 0xA1 writereg(0x1C, temp & 0x7F) // Set the OSEL bit to 0 f. To observe the current with the RC oscillator running, set the OSEL bit (register 0x1C bit 7) to 1. Note that register 0x1F MUST be written with the value 0xA1 prior to any attempt to modify register 0x1C. temp = readreg(0x1C) writereg(0x1F, 0xA1) writereg(0x1C, temp | 0x80) // Read the Oscillator Control Register // Load the Configuration Key Register with 0xA1 // Set the OSEL bit to 1 g. The calendar counter registers (registers 0x0 through 0x7) may be read to verify that the internal timing system is operational. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (15) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 5. Change the ammeter range to a setting capable of measuring nA and observe the current draw. Averaging and filtering functions can help eliminate minor fluctuations in current caused by environmental radiation. Note that nA current measurements can be influenced by both environmental conditions and equipment selection. Contact Abracon support at [email protected] with any questions about measurement conditions. 9.4. Measuring Frequency Accuracy of the ABX8XX EVK To measure frequency accuracy on the ABX8XX EVK, a high-precision universal counter should be used to monitor the frequency output on the CLKOUT pin. Follow the steps below to achieve a high accuracy reading in crystal (XT) oscillation mode, RC oscillation mode, or autocalibration mode. 1. Complete Steps 1-4 in Section 9.1. 2. Connect a universal counter to Pin 4 of the 24-pin expansion connector in Figure 6. Choose a long integration time on the universal counter (e.g., 10 seconds) to ensure that a sufficient number of clock periods are captured. 3. Power up the ABX8XX EVK and HC development boards. 4. Place the AB18X5 part in a typical oscillation state by setting the SQWE bit (register 0x13 bit 7) to 1, and the SQFS field (register 0x13 bits [4:0]) to select a low frequency used to measure the internal oscillation modes. A frequency of 1 Hz (SQFS = 0xF) allows easy interpretation of the frequency error. writereg(0x13, 0x8F) // Set the SQWE bit to 1 and the SQFS field to 0xF 5. Note that if the AB18X5 is driving an external clock signal, the current drawn will be significantly higher than the current observed in low power mode. 6. Observe the frequency reported by the universal counter. For short integration times, the frequency may appear to fluctuate for the RC oscillator, in particular. This is a result of calibration and does not affect long term accuracy. Record frequency measurements over extended periods of hours or days to achieve the most accurate data. a. To observe the Crystal oscillator, set the OSEL bit (register 0x1C bit 7) to 0. Note that register 0x1F MUST be written with the value 0xA1 prior to any attempt to modify register 0x1C. temp = readreg(0x1C) // Read the Oscillator Control Register writereg(0x1F, 0xA1) // Load the Configuration Key Register with 0xA1 writereg(0x1C, temp & 0x7F) // Set the OSEL bit to 0 b. To observe the RC oscillator, set the OSEL bit (register 0x1C bit 7) to 1. Note that register 0x1F MUST be written with the value 0xA1 prior to any attempt to modify register 0x1C. temp = readreg(0x1C) // Read the Oscillator Control Register writereg(0x1F, 0xA1) // Load the Configuration Key Register with 0xA1 writereg(0x1C, temp | 0x80) // Set the OSEL bit to 1 ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (16) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ c. To observe the RC oscillator while autocalibration is active, set the OSEL bit (register 0x1C bit 7) to 1 and the ACAL field (register 1C bits [6:5]) to 0x3. Note that register 0x1F MUST be written with the value 0xA1 prior to any attempt to modify register 0x1C. This will enable autocalibration of the RC oscillator to occur every 512 seconds (roughly every 8.5 minutes). The first autocalibration cycle will begin as soon as ACAL is set to 0x3, and will be completed with a new RC calibration value in the CALRC registers (registers 0x15 and 0x16) within 60 seconds. temp = readreg(0x1C) // Read the Oscillator Control Register temp = temp & 0x9F // Mask the ACAL field writereg(0x1C, temp | 0x60) // Set the OSEL bit to 1 and the ACAL field to 0x2 Note that frequency accuracy measurements are heavily influenced by test equipment. Contact Abracon support at [email protected] with any questions about proper test setup. 10. Schematics and Component List Figure 9 and Figure 10 below show the two pages of the ABX8XX-I2C-EVK board schematics. Figure 11 and Figure 12 show the two pages of the ABX8XX-SPI-EVK board schematics. Table 4 shows the ABX8XX-I2CEVK board component list and Table 5 shows the ABX8XX-SPI-EVK board component list. Board components labeled as DNP (do not populate) in the schematics are not installed on the board. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (17) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Figure 9. ABX8XX-I2C-EVK Schematic Page 1 ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (18) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Figure 10. ABX8XX-I2C-EVK Schematic Page 2 ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (19) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Figure 11. ABX8XX-SPI-EVK Schematic Page 1 ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (20) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Figure 12. ABX8XX-SPI-EVK Schematic Page 2 ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (21) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Table 4. ABX8XX-I2C-EVK Component List Item Qty 1 2 3 4 1 4 1 2 5 4 6 3 7 8 9 10 Reference Part MFG_Name MFG_PN Description 30mF 10nF LED_GREEN SKT_1_PIN TAIYO YUDEN TAIYO YUDEN OSRAM SAMTEC PAS311HR-VG1 TMK105B7103KV-F LG L29K-G2J1-24-Z MTMM-102-02-L-S-195 30mF super capacitor ceramic capacitor green LED two pin header 10.0k PANASONIC ERJ-2GE0R00C 0402 size 10k ohm 0 ohm PANASONIC ERJ-1GE0R00C resistor/jumper 2 1 2 C4 C7,C8, C9,C10 D2 J25,J25,J27,J28 R5,R6,R8,R11, R33,R34,R35 R4,R10,R12, R15,R25,R32 R20,R21 R27 SW2,SW1 2.2k 510 ohm EG1260AS PANASONIC PANASONIC E SWITCH ERJ-2RKF2201X ERJ-2RKF5100X EG1260AS 1 Y2 32.768kHz ABRACON ABS07-32.768kHz-7-T 0402 size 2.2k ohm 0402 size 512 ohm slide switch 3.2x1.5mm, 7pF, 32.768kHz crystal SKT_1_PIN SAMTEC MTMM-112-05-L-D-200 2mm pin headers, 2x12 AB1805 47pF ABRACON TAIYO YUDEN AB1805 UMK105CG470JV-F AB1805 16 pin QFN 0402 size 47pF 1.0pF 15mF 0.1µF ESD5V3S1U02LRH MMCX-J-P-XRA-TH1 MURATA PANASONIC MURATA INFINEON TECH. GRM1555C1H1R2CZ01D EEC-ER0E153 GRM155F50J104ZA01D ESD5V3S1U-02LRHE6327 1.0pF ceramic cap 30mF super capacitor 0.1µF ceramic cap SAMTEC MMCX-J-P-X-RA-TH1 J1,J2,J3,J4,J5,J6,J7,J8,J9, J10,J11,J12,J13,J14,J15, 11 1 J16,J17,J18,J19,J20,J21, J22,J23,J24 12 1 U3 13 1 R3 Components Not Installed 1 2 C2,C1 2 1 C6 3 1 C11 5.3V TVS diode 4 1 D1 5 1 J29 6 1 J30 HDR_2X20 SAMTEC LTH-020-01-G-D-A 7 1 J31 HDR_2X10 SAMTEC LTH-010-01-G-D-A 8 1 Q1 Si1023X VISHAY SILICONIX SI1023X-T1-GE3 9 11 0 ohm PANASONIC ERJ-1GE0R00C 10 11 12 1 2 2 R7,R9,R14,R16,R19,R24, R26,R28,R29,R30,R31 R13 R17,R23 R18,R22 51 ohm 47k 10.0k CRCW040251R01FKED RC0402FR-0747KL RC0402FR-0710KL resistor/jumper 0402 size 47k ohm 0402 size 10k ohm 13 2 SS1,SS3 1/8” STANDOFF 1600A-256-B round threaded standoff 14 1 U2 TEST POINTS 15 1 U4 TMP20AIDRL VISHAY YAGEO YAGEO RAF ELECTRONIC HARDWARD N/A TEXAS INSTRUMENTS TMP20AIDRLT temperature sensor 16 1 Y3 32.768kHz ABRACON ABS06-32.768kHz-9-T 2.0x1.2mm, 9pF, 32.768kHz crystal right angle MMCX Samtec 2x20 low profile connector Samtec 2x10 low profile connector low leakage PFET N/A ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (22) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ Table 5. ABX8XX-SPI-EVK Component List Item Qty 1 2 3 4 1 4 1 2 5 4 6 3 7 8 9 Reference Part MFG_Name MFG_PN Description 30mF 10nF LED_GREEN SKT_1_PIN TAIYO YUDEN TAIYO YUDEN OSRAM SAMTEC PAS311HR-VG1 TMK105B7103KV-F LG L29K-G2J1-24-Z MTMM-102-02-L-S-195 30mF super capacitor ceramic capacitor green LED two pin header 10.0k PANASONIC ERJ-2GE0R00C 0402 size 10k ohm 0 ohm PANASONIC ERJ-1GE0R00C resistor/jumper 1 2 C4 C7,C8, C9,C10 D2 J25,J25,J27,J28 R5,R6,R8,R11, R33,R34,R35 R4,R9,R10, R14,R24,R32 R27 SW2,SW1 510 ohm EG1260AS PANASONIC E SWITCH ERJ-2RKF5100X EG1260AS 1 Y2 32.768kHz ABRACON ABS07-32.768kHz-7-T 0402 size 512 ohm slide switch 3.2x1.5mm, 7pF, 32.768kHz crystal SKT_1_PIN SAMTEC MTMM-112-05-L-D-200 2mm pin headers, 2x12 AB1815 47pF ABRACON TAIYO YUDEN AB1815 UMK105CG470JV-F AB1815 16 pin QFN 0402 size 47pF 1.0pF 15mF 0.1µF ESD5V3S1U02LRH MMCX-J-P-XRA-TH1 MURATA PANASONIC MURATA INFINEON TECH. GRM1555C1H1R2CZ01D EEC-ER0E153 GRM155F50J104ZA01D ESD5V3S1U-02LRHE6327 1.0pF ceramic cap 30mF super capacitor 0.1µF ceramic cap SAMTEC MMCX-J-P-X-RA-TH1 J1,J2,J3,J4,J5,J6,J7,J8,J9, J10,J11,J12,J13,J14,J15, 10 1 J16,J17,J18,J19,J20,J21, J22,J23,J24 11 1 U3 12 1 R3 Components Not Installed 1 2 C2,C1 2 1 C6 3 1 C11 5.3V TVS diode 4 1 D1 5 1 J29 6 1 J30 HDR_2X20 SAMTEC LTH-020-01-G-D-A 7 1 J31 HDR_2X10 SAMTEC LTH-010-01-G-D-A 8 1 Q1 Si1023X VISHAY SILICONIX SI1023X-T1-GE3 9 11 0 ohm PANASONIC ERJ-1GE0R00C 10 11 12 1 2 2 R7,R12,R15,R16,R19, R25,R26,R28,R29,R30, R31 R13 R17,R23 R18,R22 51 ohm 47k 10.0k CRCW040251R01FKED RC0402FR-0747KL RC0402FR-0710KL resistor/jumper 0402 size 47k ohm 0402 size 10k ohm 13 2 SS1,SS3 1/8” STANDOFF 1600A-256-B round threaded standoff 14 1 U2 TEST POINTS 15 1 U4 TMP20AIDRL 16 2 R20,R21 2.2k VISHAY YAGEO YAGEO RAF ELECTRONIC HARDWARD N/A TEXAS INSTRUMENTS PANASONIC 17 1 Y3 32.768kHz ABRACON ABS06-32.768kHz-9-T right angle MMCX Samtec 2x20 low profile connector Samtec 2x10 low profile connector low leakage PFET N/A TMP20AIDRLT temperature sensor ERJ-2RKF2201X 0402 size, 2.2k ohm 2.0x1.2mm, 9pF, 32.768kHz crystal ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (23) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 11. Component Installation Differences Table 6 lists the component installation differences between the ABX8XX-I2C-EVK and ABX8XX-SPI-EVK boards. Table 6. Component Installation Differences Component R12,R15,R20,R21,R25 R9,R14,R24 ABX8XX-I2C-EVK Board Installed Not installed ABX8XX-SPI-EVK Board Not installed Installed ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (24) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 12. Notes i) The parts are manufactured in accordance with this specification. If other conditions and specifications which are required for this specification, please contact ABRACON for more information. ii) ABRACON will supply the parts in accordance with this specification unless we receive a written request to modify prior to an order placement. iii) In no case shall ABRACON be liable for any product failure from in appropriate handling or operation of the item beyond the scope of this specification. iv) When changing your production process, please notify ABRACON immediately. v) ABRACON’s products are COTS – Commercial-Off-The-Shelf products; suitable for Commercial, Industrial and, where designated, Automotive Applications. ABRACON’s products are not specifically designed for Military, Aviation, Aerospace, Life-dependant Medical applications or any application requiring high reliability where component failure could result in loss of life and/or property. For applications requiring high reliability and/or presenting an extreme operating environment, written consent and authorization from ABRACON is required. Please contact ABRACON for more information. vi) All specifications and Marking will be subject to change without notice. 13. ABRACON LLC – TERMS & CONDITIONS OF SALE The following are the terms and conditions under which Abracon LLC (“AB”) agrees to sell, to the entity named on the face hereof (“Buyer”), the products specified on the face hereof (the “Products”). Notwithstanding Buyer’s desire to use standardized RFQs, purchase order forms, order forms, acknowledgment forms and other documents which may contain terms in addition to or at variance with these terms, it is expressly understood and agreed that other forms shall neither add to, nor vary, these terms whether or not these terms are referenced therein. 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Payment of the undisputed amounts shall be made timely. AB reserves the right to require payment in advance or C.O.D. and otherwise modified credit terms. When partial shipments are made, payments for such shipments shall become due in accordance with the above terms upon submission of invoices. If, at the request of Buyer, shipment is postponed for more than thirty (30) days, payment will become due thirty days after notice to Buyer that Products are ready for shipment. Any unpaid due amounts will be subject to interest at one decimal five percent (1.5%) per month, or, if less, the maximum rate allowed by law. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (25) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ 4. 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This warranty shall not apply: (i) if Products have been damaged or submitted to abnormal conditions (mechanical, electrical, or thermal) during transit, storage, installation, or use; or (ii) if Products are subject to Improper Use (as defined below); or (iii) if the non-conformance of Products results from misuse, neglect, improper testing, storage, installation, unauthorized repair, alteration, or excess usage at or beyond the maximum values (temperature limit, maximum voltage, and other Specification limits) defined by AB; (iv) to any other default not attributable to AB; or (v) removal, alteration, or tampering of the original AB product labeling. This warranty does not extend to Products or components purchased from entities other than AB or AB’s authorized distributors or to third-party software or documentation that may be supplied with any Product. In the event no defect or breach of warranty is discovered by AB upon receipt of any returned Product, such Product will be returned to Buyer at Buyer’s expense and Buyer will reimburse AB for the transportation charges, labor, and associated charges incurred in testing the allegedly Defective Product. The above warranty is for Buyer’s benefit only, and is non-transferable. OTHER THAN THE LIMITED WARRANTY SET FORTH ABOVE, AB MAKES NO WARRANTIES, EXPRESS, STATUTORY, IMPLIED, OR OTHERWISE AND SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON- ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (26) of (27) 2 Faraday, Suite B Irvine, CA-92618 Tel: (949) 546-8000 Fax: (949) 546-8001 [email protected] __________________________________________________________________________________________ INFRINGEMENT, TO THE MAXIMUM EXTENT PERMITTED BY LAW. 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In the event any one or more of the provisions contained herein shall for any reason be held to be invalid, illegal, or unenforceable in any respect, such invalidity, illegality, or unenforceability shall not affect any other provision hereof and these terms shall be construed as if such invalid, illegal, or unenforceable provision had never been contained herein. A waiver of a breach or default under these terms shall not be a waiver of any subsequent default. Failure of AB to enforce compliance with any of these terms shall not constitute a waiver of such terms. These terms are governed by the laws of the State of California without reference to conflict of law principles. The federal and state courts located within the State of California will have exclusive jurisdiction to adjudicate any dispute arising out of these terms. ___________________________________________________________________________________________ Abracon LLC (www.abracon.com) Page (27) of (27)