LDO Voltage Regulator, 30 mA, Adjustable 0.45 V to 0.9 V Output
Low-Power Deeply Embedded RISC-V Processor
Configuration Options for Broad Application Support
The processor core can be configured to meet different application requirements. It can optionally support user and supervisor privilege modes, as well as the ISA extensions for Compressed Instructions (C), Integer Multiplication and Division Instructions (M), Atomic Instructions (A), User-Level Interrupts (N), Control and Status Register (Zicsr), and Instruction-Fence (Zifencei). Support for the single-precision floating-point (F), double-precision floating-point (D). and code size reduction (Zc) ISA extensions can also be added upon request.
Furthermore, the BA53 supports software and timer interrupts and up to 64 external interrupt lines. It features a remarkably low interrupt response time, which makes the core ideal for real-time control applications. The time elapsed from when an external interrupt is asserted until the first instruction in the resolved interrupt handler can be issued is just four clock cycles.
The user can minimize the core’s silicon footprint by choosing not to implement internal modules such as the machine mode internal timers and counters; the vectored interrupt controller (VIC); or the debug, power management (PMU), or memory protection (MPU) units. Finer-grained controls give users the means to further tune the processor’s features and size to their specific design needs, including the number and size of memory regions for the MPU, the mapping of memory addresses to interfaces, and the width of the instruction and data buses.
Compact & Energy Efficient
Designed for low energy consumption, the BA53 is compact and enables advanced power management. Under its minimal configuration, the processor size is just 20k gates This small silicon footprint is critical for minimizing leakage currents during idle or standby modes and for reducing dynamic power consumption. The BA53 also enables dynamic clock gating or power shut-off of unused modules, and dynamic frequency scaling of the bus and the CPU. The carefully designed and balanced pipeline allows clocking the BA53 with clock frequencies exceeding 1GHz even on a 16nm technology.
Easy Integration and Low Risk
The processor core uses AMBA® AXI-4 and low-latency Quick-access Memory (QMEM) interfaces for fetching instructions and accessing data and peripherals. The debug unit connects to an external JTAG/TAP controller via an APB port.
Part of the family of processor cores available from CAST for nearly ten years and used by hundreds of customers, the BA53 IP core has been designed for easy reuse and integration. It has been rigorously verified and is LINT-clean, scan-ready, and silicon-proven. It is available in Verilog source code for ASICs or FPGAs
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Block Diagram of the Low-Power Deeply Embedded RISC-V Processor IP Core
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