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OP262 bảng dữ liệu(PDF) 9 Page - Analog Devices

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OP262 bảng dữ liệu(HTML) 9 Page - Analog Devices

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ADuC841/ADuC842/ADuC843
Rev. 0 | Page 9 of 88
PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS
52 51 50 49 48
43 42 41 40
47 46 45 44
14 15 16 17 18 19 20 21 22 23 24 25 26
1
2
3
4
5
6
7
8
9
10
11
13
12
PIN 1
IDENTIFIER
TOP VIEW
(Not to Scale)
39
38
37
36
35
34
33
32
31
30
29
28
27
P1.0/ADC0/T2
P1.1/ADC1/T2EX
P1.2/ADC2
P1.3/ADC3
AVDD
AGND
CREF
VREF
DAC0
DAC1
P1.4/ADC4
P1.5/ADC5/SS
P1.6/ADC6
P2.7/PWM1/A15/A23
P2.6/PWM0/A14/A22
P2.5/A13/A21
P2.4/A12/A20
DGND
DVDD
XTAL2
XTAL1
P2.3/A11/A19
P2.2/A10/A18
P2.1/A9/A17
P2.0/A8/A16
SDATA/MOSI
ADuC841/ADuC842/ADuC843
52-LEAD PQFP
*EXTCLK NOT PRESENT ON THE ADuC841
Figure 3. 52-Lead PQPF
P1.1/ADC1/T2EX
P1.2/ADC2
P1.3/ADC3
AVDD
AVDD
AGND
AGND
AGND
CREF
VREF
DAC0
DAC1
P1.4/ADC4
P1.5/ADC5/SS
P2.7/A15/A23
P2.6/A14/A22
P2.5/A13/A21
P2.4/A12/A20
DGND
DGND
DVDD
XTAL1
P2.3/A11/A19
P2.2/A10/A18
P2.1/A9/A17
P2.0/A8/A16
SDATA/MOSI
14
1
2
3
4
5
6
7
8
9
10
11
13
12
42
41
40
39
38
37
36
35
34
33
32
31
30
29
PIN 1
IDENTIFIER
XTAL2
TOP VIEW
(Not to Scale)
ADuC841/ADuC842/ADuC843
56-LEAD CSP
*EXTCLK NOT PRESENT ON THE ADuC841
Figure 4. 56-Lead CSP
Table 3. Pin Function Descriptions
Mnemonic
Type
Function
DVDD
P
Digital Positive Supply Voltage. 3 V or 5 V nominal.
AVDD
P
Analog Positive Supply Voltage. 3 V or 5 V nominal.
CREF
I/O
Decoupling Input for On-Chip Reference. Connect a 0.47 µF capacitor between this pin and AGND.
VREF
NC
Not connected. This was reference out on the ADuC812; the CREF pin should be used instead.
AGND
G
Analog Ground. Ground reference point for the analog circuitry.
P1.0–P1.7
I
Port 1 is an 8-bit input port only. Unlike other ports, Port 1 defaults to analog input mode. To configure any of
these port pins as a digital input, write a 0 to the port bit.
ADC0–ADC7
I
Analog Inputs. Eight single-ended analog inputs. Channel selection is via ADCCON2 SFR.
T2
I
Timer 2 Digital Input. Input to Timer/Counter 2. When enabled, Counter 2 is incremented in response to a 1-to-0
transition of the T2 input.
T2EX
I
Digital Input. Capture/reload trigger for Counter 2; also functions as an up/down control input for Counter 2.
SS
I
Slave Select Input for the SPI Interface.
SDATA
I/O
User Selectable, I2C Compatible, or SPI Data Input/Output Pin.
SCLOCK
I/O
Serial Clock Pin for I2C Compatible or for SPI Serial Interface Clock.
MOSI
I/O
SPI Master Output/Slave Input Data I/O Pin for SPI Interface.
MISO
I/O
SPI Master Input/Slave Output Data I/O Pin for SPI Serial Interface.
DAC0
O
Voltage Output from DAC0. This pin is a no connect on the ADuC843.
DAC1
O
Voltage Output from DAC1. This pin is a no connect on the ADuC843.
RESET
I
Digital Input. A high level on this pin for 24 master clock cycles while the oscillator is running resets the device.


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