Analog Devices MICROCONVERTER ADUC812 Скачать руководство пользователя страница 10

 

ADuC812 Evaluation Board Reference Guide 

 

 

 

 

 (4)  E

XTERNAL 

J

UNCTIONS

(C

ONNECTORS

): 

 
J1  Analog I/O Connector 

 

The analog I/O connector J1 carries all ADC inputs and DAC output channels as well as the external V

REF

 

input. The pinout and orientation of this connector is shown below. 

 

8

1

2

3

4

5

6

7

9

10

16

11

12

13

14

15

17

18

19

20

21

22

 

Figure 2: The Analog I/O connector J2 

 

Pin Function Pin 

Function 

1 ADC0 

12 

AGND 

2 AGND 

13 

ADC6 

3 ADC1 

14 

AGND 

4 AGND 

15 

ADC7 

5 ADC2 

16 

AGND 

IN(+) OP-AMP (spare) 

17 

DAC0 

7 ADC3 

18 

Out 

OP-AMP 

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 connector J2 

 

J2  Serial Interface Connector 

 

J2 provides a simple connection of the evaluation board to the PC via a dongle cable (provided with the 
ADuC812 QuickStart Development System). 
 

J3/J6/J7  (Port0 / Port2 / Port 3) 

 

3 parallel ports (Port0, Port2 and Port3) are brought out to the connectors J4, J5 and J6. The exact pinout 
of any of these connectors is shown below with reference to figure 3. 

 
 
 

 

      Figure 

3: 

10 

way 

Connector 

Port 

 

8

1

2

3

4

5

6

7

9

10

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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