TMS470R1VF448

The TMS470R1VF448† device is a member of the Texas Instruments TMS470R1x family of general-purpose16/ 32-bit reduced instruction set computer (RISC) microcontrollers. The VF448 microcontroller offers high performance utilizing the high-speed ARM7TDMI 16/32-bit RISC central processing unit (CPU), resulting in a high instruction throughput while maintaining greater code efficiency. The ARM7TDMI 16/32-bit RISC CPU views memory as a linear collection of bytes numbered upwards from zero. The TMS470R1VF448 utilizes the bigendian format where the most significant byte of a word is stored at the lowest numbered byte and the least significant byte at the highest numbered byte.

High-end embedded control applications demand more performance from their controllers while maintaining low costs. The VF448 RISC core architecture offers solutions to these performance and cost demands while maintaining low power consumption.

The VF448 device contains the following:
· ARM7TDMI 16/32-Bit RISC CPU
· TMS470R1x system module (SYS) with 470+ enhancements
· 256K-byte flash
· 16K-byte SRAM
· Zero-pin phase-locked loop (ZPLL) clock module
· Digital watchdog (DWD) timer
· Real-time interrupt (RTI) module
· Multi-buffered serial peripheral interface (MibSPI) module
· Serial peripheral interface (SPI) module
· Two serial communications interface (SCI) modules
· Two standard CAN controllers (SCC)
· 10-bit multi-buffered analog-to-digital converter (MibADC), with 16 input channels
· High-end timer (HET) controlling 10 I/Os
· External Clock Prescale (ECP)
· Up to 51 I/O pins

The functions performed by the 470+ system module (SYS) include: address decoding; memory protection; memory and peripherals bus supervision; reset and abort exception management; prioritization for all internal interrupt sources; device clock control; and parallel signature analysis (PSA). The enhanced real-time interrupt (RTI) module on the VF448 has the option to be driven by the oscillator clock. The digital watchdog (DWD) is a 25-bit resettable decrementing counter that provides a system reset when the watchdog counter expires.

This data sheet includes device-specific information such as memory and peripheral select assignment, interrupt priority, and a device memory map. For a more detailed functional description of the SYS module, see the TMS470R1x System Module Reference Guide (literature number SPNU189).

The VF448 memory includes general-purpose SRAM supporting single-cycle read/write accesses in byte, half-word, and word modes.

The flash memory on this device is a nonvolatile, electrically erasable and programmable memory implemented with a 32-bit-wide data bus interface.The flash operates with a system clock frequency of up to 24 MHz. When in pipeline mode, the flash operates with a system clock frequency of up to 48 MHhz. For more detailed information on the flash, see the flash section of this data sheet and the TMS470R1x F05 Flash Reference Guide (literature number SPNU213).