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Circuit Description

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AT91EB42 Evaluation Board User Guide

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Содержание AT91EB42

Страница 1: ...AT91EB42 Evaluation Board User Guide 查询AT91EB42供应商捷多邦专业PCB打样工厂 24小时加急出货 ...

Страница 2: ......

Страница 3: ...2 2 Section 3 The On board Software 3 1 3 1 AT91EB42 Evaluation Board 3 1 3 2 Boot Software Program 3 1 3 3 Programmed Default Memory Mapping 3 2 3 4 SRAM Downloader 3 2 3 5 Angel Monitor 3 2 3 6 Programmed Default Speed 3 2 Section 4 Circuit Description 4 1 4 1 AT91M42800 Processor 4 1 4 2 Expansion Connectors and JTAG Interface 4 1 4 2 1 I O Expansion Connector 4 1 4 2 2 EBI Expansion Connector ...

Страница 4: ...pendix A Configuration Straps 5 1 5 1 Configuration Straps CB1 23 JP1 8 5 1 5 2 Power Consumption Measurement Strap JP5 5 4 5 3 Ground Links JP6 5 4 5 4 Increasing Memory Size 5 4 Section 6 Appendix B Schematics 6 1 6 1 Schematics 6 1 ...

Страница 5: ...re power lead with a 2 1 mm jack on one end for connection to a bench power supply is also delivered The evaluation board is also delivered with a CD ROM that contains an evaluation ver sion of the software development toolkit and the documentation that outlines the AT91 microcontroller family The evaluation board is capable of supporting different kinds of debugging systems using an ICE interface...

Страница 6: ... Diagram JTAG ICE Connector ARM7TDMI Processor 8K Byte RAM EBI EBI Expansion Connector AMBA Bridge Push buttons Interrupt Controller Watchdog PIO Timer Counters AT91M42800 ASB APB Reset Controller Reset Controller Serial EEPROM LEDs SRAM Flash SPI Serial Ports I O Expansion Connector Serial Data Flash RS232 Transceivers DB9 Serial Connectors Reset 32 768 KHz Crystal Clock Generator PIO Serial EEPR...

Страница 7: ... grounding strap or similar protective device should be worn when handling the board Avoid touching the compo nent pins or any other metallic element 2 2 Requirements Requirements in order to set up the AT91EB42 Evaluation Board are The AT91EB42 Evaluation Board itself The DC power supply capable of supplying 7 5V to 9V at 1A not supplied 2 3 Layout Figure 2 1 shows the layout of the AT91EB42 Eval...

Страница 8: ...up If it does not switch off and check the power supply connections 2 6 Measuring Current Consumption on the AT91M42800 The board is designed to generate the power for the AT91 product and only the AT91 product through the jumper JP5 VDDIO and JP8 VDDCORE This feature enables mea surements to be made of the current consumption of the AT91 product See Section 5 for further details 2 7 Testing the A...

Страница 9: ...ing 12V to the RESET pin 3 2 Boot Software Program The boot software program configures the AT91M42800 and thus controls the memory and other board components The boot software program is started at reset if JP1 is in the STD position If JP1 is in the USER position the AT91M42800 boots from address 0x01010000 in the Flash which must have a user defined boot The boot software program first initiali...

Страница 10: ...he file to be downloaded and send it Wait for the end of the transfer 4 Press any button to end the download The control is switched to the address 0x02000000 3 5 Angel Monitor The Angel monitor is located in the Flash from 0x01002000 up to 0x0100FFFF The boot program starts it if no button is pressed at reset When Angel starts it recopies itself in SRAM in order to run faster The SRAM used by Ang...

Страница 11: ...2 1 I O Expansion Connector The I O expansion connector makes the general purpose I O GPIO lines VCC3V3 and Ground available to the user Configuration straps CB2 CB3 CB4 CB11 CB13 CB14 CB15 CB17 CB18 and CB19 are used to select between the I O lines being used by the evaluation board or by the user via the I O expansion connector The con nector is not fitted at the factory however the user can fit...

Страница 12: ...ator together with two PLL based frequency multipliers and the prescaler results in a programmable master clock between 500 Hz and 33 MHz Two sets of components for the PLL filters are fitted by default on the board Figure 6 6 on page 6 7 in Section 6 Appendix B Schematics They are calculated to provide a 16 77 MHz PLLA multiplier factor of 512 and settling time of 600 µs or a 33 55 MHz PLLB multi...

Страница 13: ...ed for serial port connection Serial port A P3 is used primarily for host PC communication and is a DB9 female con nector TXD and RXD are swapped so that a straight through cable can be used CTS and RTS are connected together as are DCD DSR and DTR Serial port B P4 is a DB9 male connector with TXD and RXD obeying the standard RS 232 pinout Apart from TXD RXD and ground the other pins are not conne...

Страница 14: ...Circuit Description 4 4 AT91EB42 Evaluation Board User Guide ...

Страница 15: ...expansion connector P1 B21 Open AT91 PB5 A23 CS4 signal is not connected to the EBI expansion connector P1 B21 This authorizes users to connect the EBI expansion connector of this board to the MPI expansion connector of an AT91EB63 Evaluation Board without conflict problems CB2 CB3 CB4 ADC Enabling Closed 1 ADC U20 control lines enabled Open ADC U20 control lines disabled This authorizes users to ...

Страница 16: ... to the Flash memory This authorizes users to connect the corresponding select signal to their own resources via the EBI expansion connector CB10 Flash Reset Closed 1 The on board reset signal is connected to the Flash NRESET input Open The on board reset signal is not connected to the Flash NRESET input CB11 PB22 Ready Busy MCM Memory Signal Closed 1 AT91 PB22 signal is connected to the multi chi...

Страница 17: ... this PIO line in a low state Position it in a high state prior to a read access Open AT91 PB20 signal is not used to control the RD WR ADC U20 input pin This authorizes users to connect the corresponding signal to their own resources via the I O expansion connector CB19 PB18 End of Fast Charge Signal Closed 1 AT91 PB18 signal is connected to the battery charger U16 NFASTCHG output pin Open AT91 P...

Страница 18: ... byte SRAM memories If however the user needs more than 256K bytes of memory the devices can be replaced with two 512K x 8 3 3V 10 15 ns SRAMs giving in total 1024K bytes JP1 User or Standard Boot Selection 2 3 The first half part of the Flash memory is accessible at its base address 1 2 The second half part of the Flash memory is accessible at its base address This authorizes users to download th...

Страница 19: ...tors Figure 6 5 Push Buttons LEDs and Serial Interface Figure 6 6 AT91M42800 Figure 6 7 Reset and JTAG Interface Figure 6 8 Power Supply and Battery Charger Figure 6 9 Battery Type and Connection Figure 6 10 SPI Memories I2 C Memories and SPI ADC The pin connectors are indicated on the schematics P1 EBI Expansion Connector Figure 6 4 P2 I O Expansion Connector Figure 6 4 P3 Serial A Figure 6 5 P4 ...

Страница 20: ...Appendix B Schematics 6 2 AT91EB42 Evaluation Board User Guide Figure 6 1 PCB Layout ...

Страница 21: ...PCSA0 NPCSA1 VIN 1 4 NPCSA2 IRQ3 PB19 PB20 EXTENSIONS CONNECTORS Extension Connectors IOB_ 0 57 EBI_ 0 42 EBI MEMORIES memories connected on EBI EBI_ 0 42 A20 PB22 MICROCONTROLLER micro Rst Wchdog JTAG co EBI_ 0 42 IOB_ 0 53 IOB_13 IOB_12 IOB_11 IOB_47 IOB_46 EBI_ 0 42 EBI_ 0 42 IOB_ 0 57 IOB_ 0 57 IOB_ 0 57 IOB_ 36 45 IOB_ 0 57 IOB_32 IOB_ 0 57 EBI_ 0 42 EBI_41 IOB_52 EBI_ 0 42 IOB_14 IOB_15 IOB_...

Страница 22: ...3 12 D 4 25 D 5 26 D 6 29 D 7 30 V C C 27 G N D 10 A17 34 A18 35 V C C 9 G N D 28 D 0 7 N C 19 N C 36 U 2 IDT71V424S10Y A0 1 A1 2 A2 3 A3 4 A4 5 A5 14 A6 15 A7 16 A8 17 A9 18 A10 20 A11 21 A12 22 A13 23 A14 24 A15 32 A16 33 C S 6 W E 13 O E 31 D 1 8 D 2 11 D 3 12 D 4 25 D 5 26 D 6 29 D 7 30 V C C 27 G N D 10 A17 34 A18 35 V C C 9 G N D 28 D 0 7 N C 19 N C 36 U 5 IDT71424S10PH A0 3 A1 4 A2 5 A3 6 A...

Страница 23: ...Appendix B Schematics AT91EB42 Evaluation Board User Guide 6 5 Figure 6 4 I O and EBI Expansion Connectors ...

Страница 24: ...d LED R6 100R D2 R7 100R D3 R8 100R D4 R9 100R D5 R10 100R R11 100R D6 R12 100R D7 D8 R13 100R U8 74LV244D GND SIGNAL VCC3V3 EN EN 1 2 4 6 8 19 11 13 15 17 3 10 5 7 9 12 14 16 18 20 C17 100nF C19 100nF C18 100nF C22 100nF C21 22pF P3 Sub D 9b F 5 9 4 8 3 7 2 6 1 C20 22pF C23 22pF C26 22pF C27 22pF R16 100k P4 Sub D 9b M 5 9 4 8 3 7 2 6 1 C25 10nF R17 100K C13 100nF C12 100nF 1 2 C16 100nF JP2 jump...

Страница 25: ...NLB A0 3 A1 4 A2 5 A3 6 A4 7 A5 8 A6 9 A7 10 A8 11 A9 14 A10 15 A11 16 A12 17 A13 18 A14 19 A15 20 A16 21 A17 22 A18 23 A19 26 PB2 A20 CS7 27 PB3 A21 CS6 28 PB4 A22 CS5 29 PB5 A23 CS4 30 D0 31 D1 32 D2 33 D3 34 VDDIO 12 G N D 13 G N D 25 V D D C O R E 35 VDDIO 36 GND 37 GND 38 GND 49 D4 39 D5 40 D6 41 D7 42 D8 43 D9 44 D10 45 D11 46 D12 47 D13 50 D14 51 D15 52 PB6 TCLK0 53 PB7 TIOA0 54 PB8 TIOB0 5...

Страница 26: ... U 1 3 M A X 6 3 1 5 U S 3 0 D 4 T G N D 1 V C C 4 M R 3 R S T 2 R 2 5 1 0 0 k U 1 2 7 4 L V C 7 4 A D S C1 1D R 14 7 4 3 2 1 1 0 1 1 1 2 1 3 5 6 9 8 C 5 3 1 0 0 n F U 1 4 M A X 6 3 1 5 U S 3 0 D 4 T G N D 1 V C C 4 M R 3 R S T 2 R 2 7 1 0 0 k C 7 2 1 0 n F C 7 4 1 0 n F C 7 6 1 0 n F C 8 2 1 0 n F C 7 3 1 0 n F C 7 8 1 0 p F C 7 9 1 0 p F C 8 0 1 0 p F C 8 1 1 0 p F C 8 4 1 0 p F C 8 5 1 0 p F C ...

Страница 27: ...0 N T P 2 Test Point Corner 2 T P 3 Test Point Corner 3 T P 1 Test Point Corner 1 T P 4 Test Point Corner 4 U 1 7 L T 1 5 0 3 C S 8 1 8 Vin 4 V o u t 1 C 1 3 C 1 2 C 2 6 C 2 8 S H D N S S 5 G N D 7 J 1 J a c k D i a 2 1 m m C 5 9 22pF 25V J P 6 j u m p e r _ N O 1 2 J P 5 j u m p e r _ N O 1 2 J P 8 j u m p e r _ 3 P 1 2 3 R 3 0 1 5 0 R R 2 9 1 0 0 R C B 1 9 1 2 D 2 6 1 0 M Q 1 0 0 N D 2 4 1 0 M Q...

Страница 28: ...rd User Guide Figure 6 9 Battery Type and Connection T C Battery 6V 300mAH NiCd SAFT VRE 1 2 AA Ref 139 663 Wire gauge 20 AWG Wire gauge 20 AWG Tmax 45 C BT1 6V 300mAH 1 2 J2 con fem 43025 0400 43030 0007 MOLEX 1 2 3 4 R61 10K CTN SIEMENS B57861S103F40 ...

Страница 29: ... C R D Y B U S Y 1 W P 3 R E S E T 2 S C K 1 4 SI 1 5 S O 1 6 C S 1 3 N C 4 N C 5 N C 6 N C 9 N C 1 0 N C 1 1 N C 1 2 N C 1 7 N C 1 8 N C 1 9 N C 2 0 N C 2 1 N C 2 2 N C 2 3 N C 2 4 N C 2 5 N C 2 6 N C 2 7 N C 2 8 N C 2 9 N C 3 0 N C 3 1 N C 3 2 G N D 8 V C C 7 U 2 1 A T 2 5 2 5 6 W 1 0 S C 2 7 C S 1 W P 3 S O 2 SI 5 S C K 6 H O L D 7 G N D 4 V C C 8 C 6 7 1 0 0 n F C B 1 3 1 2 C B 1 4 1 2 R 4 0 1...

Страница 30: ...Parkway San Jose CA 95131 TEL 408 441 0311 FAX 408 487 2600 Europe Atmel U K Ltd Coliseum Business Centre Riverside Way Camberley Surrey GU15 3YL England TEL 44 1276 686 677 FAX 44 1276 686 697 Asia Atmel Asia Ltd Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721 9778 FAX 852 2722 1369 Japan Atmel Japan K K 9F Tonetsu Shinkawa Bldg 1 24 8 Shinkawa Chuo ku...

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