ADUC834 Analog Devices, ADUC834 Datasheet - Page 11

• Manufacturer Part Number: ADUC834
• Description: Precision Analog Microcontroller: 1MIPS 8052 MCU + 62kB Flash + 16/24-Bit ADC + 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC834

• Mcu Core: 8052
• Mcu Speed (mips): 1
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 4
• Other: PWM

Pin No. Pin No.
52-Lead 56-Lead
MQFP
3–4,
9–12
5
6
7
8
13
14
15
16–19,
22–25
20, 34, 48 22, 36, 51 DV
21, 35,
47
26
27
REV. A
CSP
2–3,
11–14
4, 5
6, 7, 8
9
10
15
16
17
18–21,
24–27
38, 50
23, 37,
Mnemonic
P1.2–P1.7
P1.2/DAC/IEXC1 I/O
P1.3/AIN5/IEXC2 I/O
P1.4/AIN1
P1.5/AIN2
P1.6/AIN3
P1.7/AIN4/DAC
AV
AGND
REFIN(–)
REFIN(+)
SS
MISO
RESET
P3.0–P3.7
P3.0/RXD
P3.1/TXD
P3.2/INT0
P3.3/INT1
P3.4/T0/
PWMCLK
P3.5/T1
P3.6/WR
P3.7/RD
DGND
SCLOCK
MOSI/SDATA
DD
DD
Type* Description
I
I
I
I
I/O
S
S
I
I
I
I/O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
S
S
I/O
I/O
PIN FUNCTION DESCRIPTIONS (continued)
Port 1.2 to Port 1.7 have no digital output driver; they can function as a digital
input for which ‘0’ must be written to the port bit. As a digital input, these pins
The voltage output from the DAC or one or both current sources (200 A or
Auxiliary ADC Input or one or both current sources can be configured at this pin.
Primary ADC, Positive Analog Input
Primary ADC, Negative Analog Input
Auxiliary ADC Input or Muxed Primary ADC, Positive Analog Input
Auxiliary ADC Input or Muxed Primary ADC, Negative Analog Input. The voltage
Analog Ground. Ground reference pin for the analog circuitry.
Reference Input, Negative Terminal
Reference Input, Positive Terminal
Reset Input. A high level on this pin for 16 core clock cycles while the oscillator is
External Interrupt 1. This pin can also be used as a gate control input to Timer 1.
Timer/Counter 0 External Input. If the PWM is enabled, an external clock may be
input at this pin.
Timer/Counter 1 External Input
Serial Interface Clock for Either the I
Serial Data I/O for the I
must be driven high or low externally.
These pins also have the following analog functionality:
2
output from the DAC can also be configured to appear at this pin.
Analog Supply Voltage, 3 V or 5 V
Slave Select Input for the SPI Interface. A weak pull-up is present on this pin.
Master Input/Slave Output for the SPI Interface. There is a weak pull-up on this
input pin.
running resets the device. There is an internal weak pull-down and a Schmitt
trigger input stage on this pin.
Bidirectional port pins with internal pull-up resistors. Port 3 pins that have 1s written
to them are pulled high by the internal pull-up resistors, and in that state can be used
as inputs. As inputs, Port 3 pins being pulled externally low will source current
because of the internal pull-up resistors. When driving a 0-to-1 output transition,
a strong pull-up is active for two core clock periods of the instruction cycle.
Port 3 pins also have various secondary functions including:
Receiver Data for UART Serial Port
Transmitter Data for UART Serial Port
External Interrupt 0. This pin can also be used as a gate control input to Timer 0.
External Data Memory Write Strobe. Latches the data byte from Port 0 into an
external data memory.
External Data Memory Read Strobe. Enables the data from an external data
memory to Port 0.
Digital Supply, 3 V or 5 V.
Digital Ground. Ground reference point for the digital circuitry.
Schmitt-triggered input and a weak internal pull-up is present on this pin unless
it is outputting logic low. This pin can also be directly controlled in software as a
digital output pin.
Interface. A weak internal pull-up is present on this pin unless it is outputting logic
low. This pin can also be directly controlled in software as a digital output pin.
200 A) can be configured to appear at this pin.
–11–
2
C Interface or Master Output/Slave Input for the SPI
2
C or SPI Interface. As an input, this pin is a
ADuC834