The TMS470R1B1M(2) devices are members ofthe Texas Instruments TMS470R1x family of general-purpose 16/32-bit reduced instruction set computer (RISC) microcontrollers. The B1M 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 TMS470R1B1M utilizes the big-endian 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 B1M RISC core architecture offers solutions to these performance and cost demands while maintaining low power consumption. The B1M devices contain the following: ARM7TDMI 16/32-Bit RISC CPU TMS470R1x system module (SYS) with 470+ enhancements 1M-byte flash 64K-byte SRAM Zero-pin phase-locked loop (ZPLL) clock module Digital watchdog (DWD) timer Analog watchdog (AWD) timer Enhanced real-time interrupt ( RTI) module Interrupt expansion module (IEM) Memory security module (MSM) JTAG security module Two serial peripheral interface (SPI) modules Three serial communications interface (SCI) modules Two high-end CAN controllers (HECC) Five inter-integrated circuit (I2C) modules 10-bit multi-buffered analog-to-digital converter (MibADC), with 12 input channels High-end timer lite (HET) controlling 12 I/Os External clock prescale (ECP) Expansion bus module (EBM) Up to 93 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 Parallel signature analysis (PSA) The enhanced real-time interrupt (RTI) module on the B1M 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 B1M 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 or 30 MHz, depending on the input voltage. When in pipeline mode, the flash operates with a system clock frequency of up to 48 MHz or 60 MHz, depending on the input ......