ADuC7122

The ADuC7122 is a fully integrated, 1 MSPS, 12-bit data acquisition system, incorporating high performance multichannel ADCs, 12 voltage output DACs, 16-bit/32-bit MCUs, and Flash/EE memory on a single chip.The ADC consists of up to 13 inputs. Four of these inputs can be configured as differential pairs with a programmable gain amplifier on their front end, providing a gain between 1 and 5.The ADC can operate in single-ended or differential input mode. The ADC input voltage is 0 V to VREF. A low drift band gap reference, temperature sensor, and supply voltage monitor complete the ADC peripheral set.

Features of the ADuC7122 are:(1)IOVDD power monitor channel; (2)on-chip temperature monitor; (3)11 general-purpose inputs; (4)fully differential and single-ended modes; (5)0 V to VREF analog input range; (6)12*12-bit voltage output DACs; (7)vectored interrupt controller for FIQ and IRQ; (8)8 priority levels for each interrupt type; (9)interrupt on edge or level external pin inputs.The ADuC7122 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.

The absolute maximum ratings of the ADuC7122 can be summarized as:(1)AVDD to IOVDD:-0.3V to +0.3V;(2)storage temperature range:-65 to +150;(3)operating temperature range:-10 to +95;(4)junction temperature:+150;(5)AGND to DGND:-0.3V to +0.3V;(6)digital input voltage to IOGND:-0.3 V to +5.3 V.Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied.Exposure to absolute maximum rating conditions for extended periods may affect device reliability.An ARM instruction is 32 bits long. The ARM7TDMI processor supports a second instruction set that has been compressed into 16 bits, called the thumb instruction set. Faster execution from 16-bit memory and greater code density can usually be achieved by using the thumb instruction set instead of the ARM instruction set, which makes the ARM7TDMI core particularly suitable for embedded applications.