Renesas R7S721021VLFP#AA1

Overview

R7S721021VLFP#AA1 from Renesas Electronics is a high-performance 32-bit ARM Cortex-A9 microprocessor unit (MPU) in the RZ/A1L Group, featuring 512 KB L2 cache, integrated DRAM controller, and dual USB 2.0 OTG interfaces. It operates at up to 400 MHz, supports Linux and Android OS, and targets embedded HMI applications requiring rich graphics and real-time connectivity.

For engineers reviewing the R7S721021VLFP#AA1 datasheet, R7S721021VLFP#AA1 pinout, R7S721021VLFP#AA1 application, or R7S721021VLFP#AA1 equivalent, key selection criteria include its LQFP-216 package, 1.0 V core supply, integrated 2D graphics accelerator, and support for external DDR2/DDR3 SDRAM - critical for industrial display and gateway designs.

Technical Context

The R7S721021VLFP#AA1 implements a single-core ARM Cortex-A9 CPU with NEON and VFPv4 extensions, coupled with a 512 KB unified L2 cache and memory management unit (MMU). Its on-chip bus architecture includes AXI-based North Main Bus (for high-speed peripherals) and AHB-based South Main Bus (for low-speed modules).

It integrates a programmable clock pulse generator supporting multiple PLLs, configurable boot modes (SPI flash, SD card, QSPI), and hardware-accelerated security functions including AES-128/256, SHA-256, and RSA-2048. The MPU lacks on-chip flash but relies on external non-volatile storage for firmware.

Key Specifications

Pinout & Package

LQFP-216 package with exposed thermal pad (VSSQ); 0.5 mm pitch; RoHS-compliant; operating ambient temperature range: −40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar MPU-based embedded application processor applications.

Compared with R7S721031VCB#AC0 and R7S721022VLFP#AA1, the R7S721021VLFP#AA1 offers optimal balance of LQFP manufacturability, thermal performance for indoor industrial use, and cost efficiency - making it ideal for volume HMI production where BGA rework is impractical and extended temp is unnecessary.

Availability

R7S721021VLFP#AA1 is available at Aetrix Electronics and suitable for industrial HMI displays, smart building controllers, and medical UI terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R7S721021VLFP#AA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise markets.

The RZ/A1L Group, including R7S721021VLFP#AA1, was designed specifically for cost-sensitive, Linux-capable human-machine interface applications requiring rich graphics, connectivity, and security - bridging the gap between microcontrollers and application processors.

FAQ

What is the maximum operating frequency of the R7S721021VLFP#AA1?

The R7S721021VLFP#AA1 operates at a maximum CPU frequency of 400 MHz under specified voltage (1.0 V core) and temperature (−40°C to +85°C) conditions. This frequency is achieved using the on-chip PLL with CLKIN reference; actual sustained frequency depends on thermal design and power delivery stability. The R7S721021VLFP#AA1 does not support dynamic frequency scaling beyond factory-configured PLL settings.

Does the R7S721021VLFP#AA1 include on-chip flash memory?

No, the R7S721021VLFP#AA1 does not integrate any on-chip flash memory. It relies entirely on external non-volatile storage - such as SPI flash, QSPI flash, or SD card - for boot code and application firmware. This architecture allows flexible firmware updates and eliminates flash endurance limitations inherent in embedded flash technologies. The R7S721021VLFP#AA1 supports multiple boot modes selecting among these external sources.

What types of external memory does the R7S721021VLFP#AA1 support?

The R7S721021VLFP#AA1 supports external DDR2 and DDR3 SDRAM via its integrated 16-bit memory controller, with configurable timing parameters and chip-select flexibility. It does not support LPDDR, GDDR, or NAND/NOR flash directly - those require separate controllers or bridge ICs. The R7S721021VLFP#AA1's memory controller is optimized for low-latency access patterns typical in GUI rendering and real-time data buffering.

Is the R7S721021VLFP#AA1 qualified for automotive applications?

No, the R7S721021VLFP#AA1 is classified as a "Standard" quality grade product per Renesas documentation and is intended for industrial, office, and consumer equipment - not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature validation beyond +85°C, and automotive-specific failure-in-time (FIT) reporting. For automotive use, Renesas recommends R-Car or RH850 families instead of the R7S721021VLFP#AA1.

What development tools are officially supported for the R7S721021VLFP#AA1?

Renesas provides official support for the R7S721021VLFP#AA1 through the RZ/A1L Starter Kit (RTK0EG0010S01000BJ), e2 studio IDE, GNU ARM Embedded Toolchain, and Linux BSP v5.10-based Yocto Project integration. Debugging uses JTAG/SWD via the on-chip CoreSight DAP. No Renesas-provided evaluation board uses the exact LQFP-216 package of the R7S721021VLFP#AA1; the starter kit uses a pin-compatible BGA variant for prototyping.