Analog Devices MICROCONVERTER ADUC812 Скачать руководство пользователя страница 2

 

ADuC812 Evaluation Board Reference Guide 

 Evaluation Board Overview 

C

ONTENTS

 

Evaluation Board Reference Guide: 

1)  Evaluation Board Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  3 

2)  Evaluation Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . .  4 

3)  Link options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6 

4)  External Junctions (Connectors) . . . . . . . . . . . . . . . . . . . . . . .  9 

5)  LDR Demonstration Circuit . . . . . . . . . . . . . . . 

11 

6)  Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12 

 
 

 
 

 

(1)  E

VALUATION 

B

OARD 

O

VERVIEW

 

 

The ADuC816 Evaluation board has the following features : 

 

• 

2 Layer PCB (4” X 5” Form Factor) 

• 

9V power supply/battery regulated to 5V on board (see section 2) 

• 

4 Pin Header Interface to RS232 dongle cable 

• 

Access to all ADC inputs from external header. DAC output channel buffered to external header. 

(see section 2 and section 4) 

• 

All device Ports and Strobes are brought out to external header pins (see section 4) 

• 

General Purpose Prototype Area (see section 2) 

 

• 

32KBytes External memory (SRAM) (configurable as data or volatile program memory) (see 

section 2 and section 3) 

• 

External Program Memory Socket for NV program memory (see section 2) 

• 

11.0592MHz Crystal  (see section 2) 

 

• 

Reset/External Interrupt 0 Push Buttons (see section 2) 

Содержание MICROCONVERTER ADUC812

Страница 1: ...ADUC812 EVALUATION BOARD REFERENCE GUIDE MICROCONVERTER ADUC812 QUICKSTART DEVELOPMENT SYSTEM...

Страница 2: ...ttery regulated to 5V on board see section 2 4 Pin Header Interface to RS232 dongle cable Access to all ADC inputs from external header DAC output channel buffered to external header see section 2 and...

Страница 3: ...oupling between the analog and digital sections of the board To this end the ground plane is split with the analog section on the right hand side and a digital plane on the left hand side of the board...

Страница 4: ...rpose prototype area General Purpose prototype areas are provided at the top and the bottom or the evaluation board for adding external components as required in the users application As can be seen f...

Страница 5: ...an external program memory Note If using an external program meory at U12 make sure that LK4 is switched to the off position as described above Crystal Circuit The board is fitted with a 11 0592MHz c...

Страница 6: ...low the user perform external interrupts easily The 17 signal is Schmitt triggered U5 to prevent noise on the rising edge of 17 to cause multiple interrupts as it passes the trip point This Schmitt tr...

Страница 7: ...ction Allows the External Data Memory to be used as both an External Program Memory and an External Data Memory Use Slide LK4 into the ON position to connect the PSEN output from the ADuC812 for use w...

Страница 8: ...LK8 2x1 Connect Waveform Generator Circuit Function This 3 way link is used to route a specific waveform sine square triangular onto ADC channel 0 as detailed below The frequency of the generated wave...

Страница 9: ...A to make U14 transparent Hence the external data memory U7 sees address lines A0 A14 Hence the bottom 32K Bytes of the address range are mapped into the external data memory space Note In this mode...

Страница 10: ...D 4 AGND 15 ADC7 5 ADC2 16 AGND 6 IN OP AMP spare 17 DAC0 7 ADC3 18 Out OP AMP 8 IN OP AMP spare 19 DAC1 9 ADC4 20 AGND 10 DAC ADJUST 21 VREF 11 ADC5 22 AGND Table 1 Pin functions for Analog I O conne...

Страница 11: ...J5 is situated to the left side of the board and gives access to both the SPI and I2 C interfaces The pinout is as in fig 3 with the orientation vertical Look for the pin1 marker on the evaluation boa...

Страница 12: ...chematic an example LDR circuit is connected shown in Figure 2 below ADC DAC VDD VDD Application Code LK1 LK2 Circuit diagram of the LDR Circuit Using the sample code in code adc adcldr asm the variat...

Страница 13: ...U9 1 MC7805CT Fixed 5V Linear Voltage Regulator 701 853 Farnell U11 1 AD820AR Single OP Amp 8 pin SOIC ADI U13 1 NE555D Timer 8 pin SOIC 409 352 Farnell U14 U15 2 MM74HC573WM Octal D Type Transparent...

Страница 14: ...ase 772 239 Farnell C1 C8 C10 C18 C17 C16 12 0 01uF SM Cap Surface Mount Ceramic Cap 0805 Case 499 225 Farnell C11 1 0 33uF SM Cap Surface Mount Tantalum Cap Taj A Case 498 919 Farnell C15 C24 C26 C28...

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