GENERAL DESCRIPTION

The ADuC7023 is a fully integrated, 1 MSPS, 12-bit data acquisition

system, incorporating high performance multichannel ADCs,

16-bit/32-bit MCUs, and Flash/EE memory on a single chip.

The ADC consists of up to 12 single-ended inputs. An additional four

inputs are available but are multiplexed with the four DAC output

pins. The ADC can operate in single-ended or differential input

modes. The ADC input voltage is 0 V to VREF. A low drift band gap

reference, temperature sensor, and voltage comparator complete

the ADC peripheral set.

The DAC output range is programmable to one of two voltage ranges.

The DAC outputs have an enhanced feature of being able to retain

their output voltage during a watchdog or software reset sequence.

The devices operate from an on-chip oscillator and a PLL, generating

an internal high frequency clock of 41.78 MHz. This clock is routed

through a programmable clock divider from which the MCU core

clock operating frequency is generated. The microcontroller core is an

ARM7TDMI?, 16-bit/32-bit RISC machine that offers up to 41 MIPS

peak performance. Eight kilobytes of SRAM and 62 kilobytes of

nonvolatile Flash/EE memory are provided on chip. The ARM7TDMI

core views all memory and registers as a single linear array.

The ADuC7023 contains an advanced interrupt controller. The

vectored interrupt controller (VIC) allows every interrupt to be

assigned a priority level. It also supports nested interrupts to a

maximum level of eight per IRQ and FIQ. When IRQ and FIQ

interrupt sources are combined, a total of 16 nested interrupt

levels are supported.

On-chip factory firmware supports in-circuit download via the I2C

serial interface port, and nonintrusive emulation is supported via

the JTAG interface. These features are incorporated into a low cost

QuickStart? development system supporting this MicroConverter?

family. The part contains a 16-bit PWM with five output signals.

For communication purposes, the part contains 2 × I2C channels that

can be individually configured for master or slave mode. An SPI

interface supporting both master and slave modes is also provided.

The parts operate from 2.7 V to 3.6 V and are specified over an

industrial temperature range of ?40°C to +125°C. The ADuC7023 is

available in either a 32-lead or 40-lead LFCSP package. A 36-ball

wafer level CSP package (WLCSP) is also available.

FEATURES

Analog I/O

Multichannel, 12-bit, 1 MSPS ADC

Up to 12 ADC channels

Fully differential and single-ended modes

0 V to VREF analog input range

12-bit voltage output DACs

4 DAC outputs available

On-chip voltage reference

On-chip temperature sensor

Voltage comparator

Microcontroller

ARM7TDMI core, 16-bit/32-bit RISC architecture

JTAG port supports code download and debug

Clocking options

Trimmed on-chip oscillator (±3)

External watch crystal

External clock source up to 44 MHz

41.78 MHz PLL with programmable divider

APPLICATIONS

Optical networking

Industrial control and automation systems

Smart sensors, precision instrumentation

Base station systems