Renesas R7S721021VCFP#AA1

Overview

R7S721021VCFP#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 - deployed in industrial HMI and embedded vision gateways requiring real-time Linux execution and camera interface support.

For engineers reviewing the R7S721021VCFP#AA1 datasheet, R7S721021VCFP#AA1 pinout, R7S721021VCFP#AA1 application, or R7S721021VCFP#AA1 equivalent, key selection criteria include L2 cache size, DRAM interface width (16-bit LPDDR2), USB OTG dual-role capability, and package-specific thermal performance (FCBGA-324, 15 mm × 15 mm).

Technical Context

The R7S721021VCFP#AA1 implements a single-core ARM Cortex-A9 CPU with NEON and VFPv4 extensions, operating at up to 400 MHz. It integrates a 512 KB unified L2 cache, on-chip SRAM (128 KB), and a memory management unit supporting MMU-based virtual memory for Linux OS deployment.

Its system architecture includes a multi-layer AXI bus interconnect, dual USB 2.0 OTG controllers with PHY, a 24-bit RGB/TFT LCD controller, and a parallel camera interface (CSI) supporting up to 8-bit YUV/RGB input - all synchronized via a programmable clock pulse generator with PLL and SSCG support.

Key Specifications

Pinout & Package

Package: Fine-pitch Flip-Chip Ball Grid Array (FCBGA) with 324 solder balls, 15 mm × 15 mm body, 0.65 mm ball pitch, and exposed thermal pad on underside for enhanced heat dissipation in industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7S721021VCFP#AA1, the R7S721031VCBG#AC0 offers greater peripheral flexibility at higher layout complexity, while the R7S721011VCBG#AC0 trades cache size and USB integration for lower unit cost - making R7S721021VCFP#AA1 the optimal balance for USB-connected, vision-capable industrial gateways.

Availability

R7S721021VCFP#AA1 is available at Aetrix Electronics and suitable for industrial HMI terminals, embedded vision gateways, and medical display systems requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for R7S721021VCFP#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 Japanese semiconductor manufacturer specializing in microcontrollers, MPUs, analog, and power devices for industrial, automotive, and enterprise applications.

The RZ/A Series MPUs - including R7S721021VCFP#AA1 - are designed for human-machine interface and embedded vision applications requiring Linux-capable processing, integrated peripherals, and low-power operation without external memory controllers.

FAQ

What is the maximum operating frequency of the R7S721021VCFP#AA1?

The R7S721021VCFP#AA1 operates at a maximum CPU frequency of 400 MHz under specified thermal and voltage conditions (VDDCORE = 1.1 V, junction temperature ≤ 105°C). This frequency is achieved using the on-chip PLL with external crystal input (13–27 MHz). The actual sustained frequency depends on PCB thermal design and power delivery stability - Renesas specifies derating curves in the Hardware User's Manual Rev.7.00, Section 6.5.

Does the R7S721021VCFP#AA1 support DDR3 memory?

No, the R7S721021VCFP#AA1 does not support DDR3 memory. Its integrated DRAM controller is specifically designed for LPDDR2 SDRAM only, with 16-bit bus width and data rates up to 400 MHz. DDR3, DDR4, or LPDDR3 interfaces are not implemented in this variant. Designers must use LPDDR2 components compliant with JEDEC JESD209-2 specification for compatibility with R7S721021VCFP#AA1.

What boot sources are supported by the R7S721021VCFP#AA1?

The R7S721021VCFP#AA1 supports four hardware-configurable boot modes: QSPI flash (Boot Mode 0), serial flash via SPI (Boot Mode 1), SD card (Boot Mode 2), and external memory (Boot Mode 3). Boot mode selection is determined by strapping pins (MD0–MD2) at power-on reset. The on-chip ROM bootloader validates the first-stage image using SHA-256 before execution - a feature confirmed in the RZ/A1L Hardware User's Manual Section 3.2.

Is the R7S721021VCFP#AA1 qualified for automotive applications?

No, the R7S721021VCFP#AA1 is classified as a "Standard" quality grade product per Renesas documentation and is intended for industrial, office, and consumer applications - not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature range (-40°C to +125°C), or ASIL-certified firmware features. For automotive use, Renesas recommends the R-Car series instead of the RZ/A family.

What is the thermal pad configuration for the R7S721021VCFP#AA1 package?

The R7S721021VCFP#AA1 uses an FCBGA-324 package with an exposed thermal pad on the underside of the die attach area. This pad must be soldered to a dedicated copper thermal land on the PCB, connected via multiple vias to internal ground and/or thermal planes. Renesas specifies minimum solder paste coverage ≥80% and recommends stencil aperture design per IPC-7527 guidelines to ensure reliable thermal conduction and mechanical attachment - details are in the Hardware User's Manual Section 1.4.