R7S721021VCFP#AA1 - RZ/A1L 400MHz ARM Cortex-A9 MPU 3MB SRAM
MPN: R7S721021VCFP#AA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.62 | $28.62 |
| 10 | $25.76 | $257.60 |
| 100 | $22.18 | $2,218.00 |
| 500 | $18.94 | $9,470.00 |
| 1,000 | $16.35 | $16,350.00 |
R7S721021VCFP#AA1 Overview
A microprocessor (MPU) is an integrated circuit containing a full CPU core plus system logic, distinguished from a microcontroller (MCU) by higher processing throughput, external memory addressing, and complex peripheral integration. The RZ/A1L sits in the hierarchy: MPU -> application processor -> SoC -> RISC ARM Cortex-A family -> Renesas RZ/A1L product line. With 3 MB of embedded SRAM, the part targets graphical HMI applications where eliminating external DRAM reduces BOM cost and EOL risk.
Key features of the R7S721021VCFP#AA1 include single-core 32-bit ARM Cortex-A9 at 400 MHz, 3 MB on-chip SRAM, integrated TFT LCD controller supporting up to 2x WVGA (800x480) or one WSVGA (1024x600) display, 10/100 Ethernet MAC, USB 2.0 host/function with PHY, multiple CAN/LIN/SPI/I2C interfaces, 12-bit ADC, timers, PWM, real-time clock, and watchdog timer.
Architecture-wise, the Cortex-A9 core is paired with NEON SIMD and a dual-issue pipeline. The 3 MB unified SRAM can serve as frame buffer and code execution area without external DRAM, lowering system cost. The integrated TFT LCD controller with hardware-accelerated 2D graphics (raster engine) simplifies HMI design.
Typical applications include industrial HMI panels, building automation control displays, home appliances with graphical UI, point-of-sale terminals, and medical device interfaces. The chip's high memory bandwidth plus display controller make it suited for graphics-rich embedded products.
When designing, note that this is a ROMless device, so external NOR/NAND flash is mandatory. Power sequencing and decoupling per the Renesas hardware manual are critical for reliable boot. Use the Renesas e2studio IDE and Smart Configurator for pin and clock setup.
This page synthesizes distributor stock status, drop-in alternatives, thermal/PCB guidance, and pricing benchmarks from multiple sources - engineering content complementing the manufacturer datasheet.
Drop-in alternatives for R7S721021VCFP#AA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with R7S721021VCFP#AA1 (same form factor and footprint) — differing in ADC, Mounting Type, Core Architecture, Cryptographic Engine, Maximum Clock Frequency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
R7S721021VCFP#BA1
✅ Drop-In📋 Reference alternative (not in catalog)
R7S721020VCFP#AA1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
R7S721001VCBG#AC0
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MZ2048ECG100-I/PF
✅ Drop-In✓ In Stock
$7.45 / Unit
View Datasheet →PIC32MZ1024EFE100-I/PT
✅ Drop-In✓ In Stock
$8.1 / Unit
View Datasheet →R7S721021VCFP#AA1 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-A9 |
| Number of Cores | 1 |
| Data Bus Width | 32-bit |
| Maximum Clock Frequency | 400 MHz |
| On-chip SRAM | 3 MB |
| Program Memory Type | ROMless (requires external flash) |
| Package Type | LFQFP-208 (28x28 mm) |
| Mounting Type | Surface Mount (SMT) |
| Graphics Controller | TFT LCD controller, up to 2x WVGA or 1x WSVGA |
| Ethernet | 10/100 MAC (MII/RMII) |
| USB Interface | USB 2.0 host/function with integrated PHY |
| Serial Interfaces | CAN, LIN, SCI (UART), SPI, I2C, USART |
| External Bus Interface | EBI/EMI (external memory bus) |
| ADC | 12-bit A/D converter |
| Other Peripherals | DMA, POR, PWM, WDT, RTC |
R7S721021VCFP#AA1 lfqfp-208 (28x28 mm) Pin Configuration Guide
Pin configuration for R7S721021VCFP#AA1 (lfqfp-208 (28x28 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for R7S721021VCFP#AA1.
Refer to the datasheet for full pin configuration.
Typical Applications
R7S721021VCFP#AA1 is suitable for 6 applications: Industrial HMI Panels, Building Automation Control Displays, Home Appliances with Graphical UI, Point-of-Sale Terminals, Medical Device Interfaces, Energy / Smart Meter Displays.
Industrial HMI Panels
The R7S721021VCFP#AA1 is purpose-built for industrial HMI panels needing a color TFT display. Its ARM Cortex-A9 at 400 MHz drives a 2D raster engine and an integrated TFT LCD controller that drives up to WSVGA (1024x600) resolution. The 3 MB on-chip SRAM doubles as frame buffer and CPU working memory, eliminating external DRAM and shrinking BOM cost. Industrial-grade peripherals (CAN, LIN, RS-485 via SCI, hardware WDT) fit factory automation protocols.
Recommended
Building Automation Control Displays
In HVAC thermostats, access control keypads, and elevator HMI screens, the R7S721021VCFP#AA1 brings Cortex-A9 horsepower plus the peripheral set needed for BACnet/Modbus gateways. Its 10/100 Ethernet MAC and dual CAN interfaces ease integration into building automation backbones, while the TFT controller renders multi-page touch UIs. The 3 MB SRAM holds full UI state without external memory.
Recommended
Home Appliances with Graphical UI
Premium washing machines, ovens, and induction cooktops use the R7S721021VCFP#AA1 to render animated icons and touchscreen menus. The Cortex-A9 throughput drives smooth UI animation while the integrated TFT controller interfaces directly to mid-size LCDs. CAN/LIN connectivity links to sub-MCUs in motor/driver boards, and the ROMless architecture lets manufacturers update appliance firmware through external flash.
Recommended
Point-of-Sale Terminals
POS terminals require a responsive touchscreen UI, network connectivity, and reliable boot. The R7S721021VCFP#AA1 supplies Cortex-A9 performance to render transaction flows while the 10/100 Ethernet MAC and USB 2.0 function port connect to back-office gateways and peripherals (barcode scanners, printers, payment terminals). The 3 MB on-chip SRAM holds active transaction logs without external DRAM.
Recommended
Medical Device Interfaces
Patient monitors, infusion pumps, and diagnostic instrument displays benefit from the R7S721021VCFP#AA1's HMI capability and Cortex-A9 CPU. The integrated TFT controller renders sharp medical readouts, the 12-bit ADC interfaces to analog sensor front-ends, and the hardware watchdog plus rich connectivity (CAN, USB, Ethernet) support safety-critical communication. The ROMless external memory model allows medical OEMs to control firmware revision rigorously.
Recommended
Energy / Smart Meter Displays
Smart electricity meters and sub-station HMIs use the R7S721021VCFP#AA1 to render consumption data, alerts, and configuration UIs. The TFT controller drives graphical LCDs, the Ethernet MAC feeds AMI back-haul, and the CAN interface connects to PMU sub-modules. The 3 MB internal SRAM eliminates external DRAM, lowering long-term BOM cost and avoiding memory EOL risk for utility-grade product lifetimes.
Recommended
Recommended Products Summary
Engineering reference data for R7S721021VCFP#AA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | R7S721021VCFP#BA1 | R7S721020VCFP#AA1 | R7S721001VCBG#AC0 | PIC32MZ2048ECG100-I/PF | PIC32MZ1024EFE100-I/PT |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Microchip Technology | Microchip Technology |
| Package | LFQFP-208 (28x28 mm) | LFQFP-208 (28x28 mm) - same | LFQFP-208 (28x28 mm) - same | BGA-176 - smaller, NOT pin-compatible with LFQFP-208 | TQFP-100 - smaller, requires PCB redesign | TQFP-100 - smaller, requires PCB redesign |
| Core Architecture | ARM Cortex-A9 | ARM Cortex-A9 (same) | ARM Cortex-A9 (same) | ARM Cortex-A9 (same) | MIPS M-Class (M14K) | MIPS M-Class (M14K) |
| Max Clock Frequency | 400 MHz | 400 MHz | 400 MHz | 400 MHz | 200 MHz | 200 MHz |
| On-chip SRAM | 3 MB | 3 MB | 3 MB (per RZ/A1L group) | 3 MB | 512 KB | 512 KB |
| Program Memory | ROMless (external flash) | ROMless | ROMless | ROMless | 2 MB on-chip flash | 1 MB on-chip flash |
| TFT LCD Controller | Yes (up to WSVGA) | Yes (up to WSVGA) | Yes | Yes | Parallel graphics port (no integrated LCD controller) | Parallel graphics port (no integrated LCD controller) |
| Ethernet | 10/100 MAC integrated | 10/100 MAC | 10/100 MAC | 10/100 MAC | 10/100 MAC (variant-dependent) | 10/100 MAC (variant-dependent) |
| USB | USB 2.0 host/function with PHY | USB 2.0 host/function | USB 2.0 host/function | USB 2.0 host/function | USB 2.0 FS host/device/OTG | USB 2.0 FS host/device/OTG |
Key Differentiators
- 3 MB on-chip SRAM eliminates external DRAM for HMI panel designs (vs PIC32MZ2048ECG100-I/PF)
- Integrated TFT LCD controller for direct panel drive (vs R7S721021VCFP#BA1)
- Same-brand LFQFP-208 footprint across the RZ/A1L group (vs R7S721001VCBG#AC0)
Design Notes
The R7S721021VCFP#AA1 requires multiple supply rails (core, RTC, I/O, PLL, USB PHY). Use the Renesas recommended power-tree: a DC-DC for the core rail plus LDOs for analog/PLL rails. Decoupling follows Renesas hardware manual section 'Power Supply' - typically 0.1 uF + bulk caps per rail near each supply pin. Sequencing must follow the manual; out-of-spec ramp times can latch the PLL incorrectly.
Use at least 4-layer PCB with continuous ground plane under the LFQFP-208 package to manage return paths for the 400 MHz Cortex-A9 core. Place external flash on the EBI bus with impedance-controlled traces and 33 ohm series termination on data lines longer than 50 mm. Keep the XTAL traces short and guard them with ground pour on both sides to minimize clock jitter.
Do not assume the 3 MB SRAM survives reset without re-initialization. The ROMless design means an invalid boot image (bad flash ID, failed SPI handshake) results in a silent no-boot - always include a bootloader fallback and validate SPI flash CRC. Watchdog timer initialization must occur within the first 1 second of boot or per Renesas e2studio startup code; missing this trap results in spurious resets during long firmware updates.
Differential pair routing is required for the USB D+/D- lines and the Ethernet MII/RMII data/clock paths. Match intra-pair skew within 50 mils and keep 90-ohm differential impedance (USB) and 50-ohm single-ended (Ethernet) per the RZ/A1L hardware manual. Place the 24 MHz main crystal within 5 mm of the XTAL pins and isolate it from switching power nodes.
Compliance Information
RoHS compliance inferred from Renesas RZ/A1L family documentation - full compliance declaration available on the Renesas product page. AEC-Q100 not applicable for this consumer/industrial MPU.
