Описание
The MAXQ7670A is a highly integrated solution for measuring multiple analog signals and outputting the results on a control area network (CAN) bus. The device operates from a single 5V supply and incorporates a high-performance, 16-bit reduced instruction set computing (RISC) core, a SAR ADC, and a CAN 2.0B controller, supporting transfer rates up to 1Mbps. The 12-bit SAR ADC includes a differential amplifier with programmable gains of 1V/V or 16V/V, 8 input channels, and conversion rates up to 125ksps. The eight single-ended ADC inputs can be configured as four unipolar or bipolar, fully differential inputs. For single-supply operation, the external 5V supply powers the digital I/Os and two separate integrated linear regulators that supply the 2.5V digital core and the 3.3V analog circuitry. Each supply rail has a dedicated power-supply supervisor that provides brownout detection and power-on reset (POR) functions. The 16-bit RISC microcontroller (µC) includes 64KB (32K x 16) of nonvolatile program/data flash and 2KB (1K x 16) of data RAM. Other features of the MAXQ7670A include a 4-wire SPI interface, a JTAG interface for in-system programming and debugging, an integrated 15MHz RC oscillator, external crystal oscillator support, a timer/counter with pulse-width modulation (PWM) capability, and seven GPIO pins with interrupt and wake-up capability. The system-on-a-chip (SoC) MAXQ7670A is a µC-based, smart data acquisition system. As a member of the MAXQ family of 16-bit, RISC µCs, the MAXQ7670A is ideal for low-cost, low-power, embedded-applications such as automotive, industrial controls, and building automation. The flexible, modular architecture used in the MAXQ µCs allows development of targeted products for specific applications with minimal effort. The MAXQ7670A is available in a 40-pin, 5mm x 5mm TQFN package, and is specified to operate over the -40°C to +125°C automotive temperature range.
- High-Performance, Low-Power, 16-Bit RISC Core
- 0.166MHz to 16MHz Operation, Approaching 1MIPS/MHz
- Low Power (< 1mA/MIPS, VDVDD = +2.5V)
- 16-Bit Instruction Word, 16-Bit Data Bus
- 33 Instructions, Most Require Only One Clock Cycle
- 16-Level Hardware Stack
- 16 x 16-Bit, General-Purpose Working Registers
- Three Independent Data Pointers with Auto-Increment/Decrement
- Low-Power, Divide-by-256, Power-Management Modes (PMM) and Stop Mode
- 64KB Internal Nonvolatile Program/Data Flash
- 2KB Internal Data RAM
- 8 Single-Ended/4 Differential Channels, 12-Bit Resolution
- PGA Gain = 1V/V or 16V/V
- 125ksps (75.5ksps with PGA Gain = 16V/V)
- CAN 2.0B Controller (15 Message Centers)
- Serial Peripheral Interface (SPI)
- JTAG Interface (Extensive Debug and Emulation Support)
- Single 16-Bit/Dual 8-Bit Timer/PWM
- Seven General-Purpose, Digital I/O Pins with External Interrupt/Wake-Up Features
- Internal Oscillator Supports External Crystal (8MHz or 16MHz)
- Integrated 15MHz RC Oscillator
- External Clock Source Operation
- Programmable Watchdog Timer
- Power-On Reset
- Power-Supply Supervisor/Brownout Detection
- Integrated +2.5V and +3.3V Linear Regulators
