Datasheet
Table Of Contents
- Features
- Applications
- Functional Block Diagram
- General Description
- Revision History
- Specifications
- Absolute Maximum Ratings
- Pin Configurations and Function Descriptions
- Typical Performance Characteristics
- Terminology
- Explanation of Typical Performance Plots
- Memory Organization
- Special Function Registers (SFRs)
- Special Function Registers
- ADC Circuit Information
- Calibrating the ADC
- Initiating Calibration in Code
- Nonvolatile Flash/EE Memory
- Using the Flash/EE Data Memory
- User Interface to Other On-Chip ADuC832 Peripherals
- On-Chip PLL
- Pulse-Width Modulator (PWM)
- PWM Modes of Operation
- Serial Peripheral Interface
- I2C-Compatible Interface
- Dual Data Pointers
- Power Supply Monitor
- Watchdog Timer
- Time Interval Counter (TIC)
- 8052-Compatible On-Chip Peripherals
- Timer/Counter 0 And Timer/Counter 1 Operating Modes
- Timer/Counter 2
- UART Serial Interface
- SBUF
- SCON (UART Serial Port Control Register)
- Mode 0: 8-Bit Shift Register Mode
- Mode 1: 8-Bit UART, Variable Baud Rate
- Mode 2: 9-Bit UART with Fixed Baud Rate
- Mode 3: 9-Bit UART with Variable Baud Rate
- UART Serial Port Baud Rate Generation
- Timer 1 Generated Baud Rates
- Timer 2 Generated Baud Rates
- Timer 3 Generated Baud Rates
- Interrupt System
- ADuC832 Hardware Design Considerations
- Other Hardware Considerations
- Development Tools
- Outline Dimensions
ADuC832 Data Sheet
Rev. B | Page 22 of 92
Pin No.
Mnemonic MQFP LFCSP Type Description
V
REF
8 10 I/O Reference Input/Output. This pin is connected to the internal reference through a
series resistor and is the reference source for the analog-to-digital converter. The
nominal internal reference voltage is 2.5 V, which appears at the pin. See the Voltage
Reference Connections section on how to connect an external reference.
DAC0
9
11
O
Voltage Output from DAC0.
DAC1 10 12 O Voltage Output from DAC1.
P1.4/ADC4 11 13 I Input Port 1 (P1.4). Port 1 is an 8-bit input port only. Unlike other ports, Port 1 defaults
to analog input mode. To configure any Port 1 pin as a digital input, write a 0 to the
Port 1 bit. Port 1 pins are multifunctional and share the following functionality.
I Single-Ended Analog Input (ADC4). Channel selection is via ADCCON2 SFR.
P1.5/ADC5/
SS
12 14 I Input Port 1 (P1.5). 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. Port 1 pins are multifunction and share the following functionality.
I Single-Ended Analog Input (ADC5). Channel selection is via ADCCON2 SFR.
I
Slave Select Input for the SPI Interface (
SS
).
P1.6/ADC6 13 15 I Input Port 1 (P1.6). Port 1 is an 8-bit input port only. Unlike other ports, Port 1 defaults
to analog input mode. To configure any Port 1 pin as a digital input, write a 0 to the
Port 1 bit. Port 1 pins are multifunctional and share the following functionality.
I Single-Ended Analog Input (ADC6). Channel selection is via ADCCON2 SFR.
P1.7/ADC7 14 16 I
Input Port 1 (P1.7). Port 1 is an 8-bit input port only. Unlike other ports, Port 1
defaults to Analog Input mode. To configure any Port 1 pin as a digital input,
write a 0 to the Port 1 bit. Port 1 pins are multifunctional and share the following
functionality.
I Single-Ended Analog Input (ADC7). Channel selection is via ADCCON2 SFR.
RESET 15 17 I Digital Input. A high level on this pin for 24 master clock cycles while the oscillator is
running resets the device.
P3.0/RxD 16 18 I/O Input/Output Port 3 (P3.0). Port 3 is a bidirectional port 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 sources current because of the internal pull-up resistors.
I Receiver Data Input (Asynchronous) or Data Input/Output (Synchronous) of Serial
(UART) Port (RxD).
P3.1/TxD 17 19 I/O Input/Output Port 3 (P3.1). Port 3 is a bidirectional port 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 sources current because of the internal pull-up resistors.
O Transmitter Data Output (Asynchronous) or Clock Output (Synchronous) of Serial
(UART) Port (TxD).
P3.2/
INT0
18 20 I Input/Output Port 3 (P3.2). Port 3 is a bidirectional port 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 sources current because of the internal pull-up resistors.
I
Interrupt 0 (
INT0
). This programmable edge or level triggered interrupt input can be
programmed to one of two priority levels. This pin can also be used as a gate control
input to Timer 0.
P3.3/
INT1
/MISO/PWM1
19 21 I Input/Output Port 3 (P3.3). Port 3 is a bidirectional port 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 sources current because of the internal pull-up resistors.
I
Interrupt 1 (
INT1
). This programmable edge or level triggered interrupt input can be
programmed to one of two priority levels. This pin can also be used as a gate control
input to Timer 1.
I/O SPI Master Input/Slave Output Data I/O Pin for SPI Serial Interface (MISO).
O PWM1 Voltage Output (PWM1). See the ADuC832 Configuration SFR (CFG832) section
for further information.
DV
DD
20, 34,
48
22, 36,
51
P Digital Positive Supply Voltage, 3 V or 5 V Nominal.
DGND 21, 35,
47
23, 37,
38, 50
G Digital Ground. Ground reference point for the digital circuitry.