19-3217; Rev 1; 10/08
http://www.elecfans.com 电子发烧友 http://bbs.elecfans.com 电子技术论坛
KIT ATION EVALU E AILABL AV
16-Bit RISC Microcontroller-Based Smart Data-Acquisition Systems
General Description
Program and Data Memory Smart Analog Peripherals
Three Independent Data Pointers with Automatic Increment/Decrement Up to 128KB (64K x 16) Internal Flash 512 Bytes (256 x 16) Internal RAM Low-Power, Eight Differential-Channel, 12-Bit, 500ksps ADC Programmable-Gain Amplifier, Software-Selectable Gain: 1V/V, 2V/V, 4V/V, 8V/V, 16V/V, 32V/V 12-Bit DAC with Buffered Voltage Output External References for ADC and DAC Internal (Die) and External Diode Temperature Sensing Full CAN 2.0B Controller 15 Message Centers (256-Byte Dual Port Memory) Programmable Bit Rates from 10kbps to 1Mbps Standard 11-Bit or Extended 29-Bit Identification Modes Two Data Masks and Associated IDs for DeviceNET, SDS and Other Higher Layer CAN Protocols External Transmit Disable for Autobaud SIESTA Low-Power Mode Wake-Up on CANRXD Edge Transition UART (LIN) with User-Programmable Baud Rate 16 x 16 Hardware Multiplier with 48-Bit Accumulator, Single Clock Cycle Operation Three 16-Bit (or Six 8-Bit) Programmable Timer/Counter/PWM Eight General-Purpose, Digital I/O Pins, with External Interrupt Capability All Interrupts Can Be Used as a Wake-Up Internal Oscillator for Use with External Crystal On-Chip RC Oscillator Eliminates External Crystal External Clock-Source Operation Programmable Watchdog Timer Power-On Reset (POR) Power-Supply Supervisor/Brownout Detection for Digital I/O and Digital Core Supplies On-Chip +3.3V, 50mA Linear Regulator Extensive Debug and Emulation Support In-System Test Capability Flash-Memory-Program Download Software Bootstrap Loader for Flash Programming
MAXQ7665A–MAXQ7665D
The MAXQ7665A–MAXQ7665D smart systems-on-a-chip (SoC) are data-acquisition systems based on a microcontroller (C). As members of the MAXQ family of 16bit, reduced instruction set computing (RISC) Cs, the MAXQ7665A–MAXQ7665D are ideal for low-cost, lowpower, embedded applications such as automotive, industrial controls, and building automation. The flexible, modular architecture design used in these Cs allows development of targeted products for specific applications with minimal effort. The MAXQ7665A–MAXQ7665D incorporate a high-performance 16-bit RISC core, a 12-bit 500ksps SAR ADC with a programmable gain amplifier (PGA), and a full CAN 2.0B controller supporting transfer rates up to 1Mbps. These devices include a 12-bit DAC with a buffered voltage output and on-chip oscillator circuitry to operate from an external high frequency (8MHz) crystal. There is also a built-in internal RC oscillator as an alternative to using an external crystal. The MAXQ7665A–MAXQ7665D contain an internal temperature sensor to measure die temperature and a remote temperature-sensor driver. The analog functions and digital I/O are powered from a +5V supply, while the internal digital core is powered from +3.3V, which can be supplied by an on-chip linear regulator. These devices also include a dual power-supply supervisor with reset and a JTAG interface for in-system programming and debugging. The 16-bit RISC C includes up to 128KB (64K x 16) of flash memory and 512 bytes (256 x 16) of RAM. The MAXQ7665A–MAXQ7665D are available in a 7mm x 7mm 48-pin TQFN package and are specified to operate from -40°C to +125°C.

下一页