Renesas R7S910021CBG#AC0

Overview

R7S910021CBG#AC0 from Renesas Electronics is a high-performance 32-bit Arm Cortex-R4 real-time microcontroller operating at 450 MHz, delivering 747 DMIPS with on-chip FPU, 1 Mbyte ECC-protected extended SRAM, dual 12-bit A/D converters (8+8 channels), and integrated safety functions including CRC, IWDTa, and error control module (ECM). It targets industrial motion control systems requiring deterministic low-latency response.

For engineers reviewing the R7S910021CBG#AC0 datasheet, R7S910021CBG#AC0 pinout, R7S910021CBG#AC0 application, or R7S910021CBG#AC0 equivalent, key selection criteria include its 450 MHz Cortex-R4 core with TCM/ECC memory, 112-pin FBGA package (PLBG0112KA-A), MDIO slave interface for CFP-compliant optical transceivers, and support for event-link controller–driven peripheral coordination without CPU wake-up.

Technical Context

This MCU implements a Harvard-architecture Cortex-R4 r1p4 core with 8-stage pipeline, dual 8-Kbyte instruction/data caches (ECC-protected), and 512 Kbytes ATCM + 32 Kbytes BTCM (both ECC-protected). It integrates tightly coupled peripherals including two 16-channel DMAC units, ELC for hardware-triggered module chaining, and dual 12-bit S12ADCa units with self-diagnosis and analog disconnection detection.

Clock generation supports 25 MHz crystal input, yielding up to 450 MHz CPU clock and fixed 150/75/60 MHz peripheral clocks. Safety architecture includes register write protection, input clock oscillation stop detection, CLMA clock monitor, and duplicated ECM for fault signaling via interrupt, internal reset, or pin output - all verified for industrial temperature range (Tj = −40°C to +110°C).

Key Specifications

Pinout & Package

Package: 112-pin Fine-Pitch Ball Grid Array (FBGA), PLBG0112KA-A, 6 mm × 6 mm, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar real-time microcontroller applications.

Compared with R7S910020CBG#AC0, R7S910021CBG#AC0 reduces external memory dependency and improves functional safety margin via integrated ECC SRAM; versus R7S910022CBG#AC0, it trades MDIO master capability for lower licensing cost and simplified optical subsystem design where only slave-mode monitoring is required.

Availability

R7S910021CBG#AC0 is available at Aetrix Electronics and suitable for industrial servo drives, programmable logic controllers, robotics motion controllers, and industrial Ethernet gateways requiring stable component supply across extended product lifecycles.

Supply support for R7S910021CBG#AC0 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The RZ/T1-M Group, including R7S910021CBG#AC0, is engineered for deterministic real-time control in industrial automation - integrating safety, security, and high-speed connectivity to replace FPGA+MCU combinations in motion control and networked equipment.

FAQ

What is the maximum operating frequency and DMIPS rating of the R7S910021CBG#AC0?

The R7S910021CBG#AC0 operates at a maximum CPU frequency of 450 MHz and achieves 747 DMIPS performance. This is measured under standard conditions using the Dhrystone 2.1 benchmark at full clock speed with caches and TCM enabled. The R7S910021CBG#AC0 sustains this performance across its full industrial temperature range (−40°C to +110°C junction).

Does the R7S910021CBG#AC0 include on-chip SRAM with error correction?

Yes, the R7S910021CBG#AC0 integrates 1 Mbyte of on-chip extended SRAM with SEC-DED (single error correction/double error detection) ECC protection. This memory operates at 150 MHz and is distinct from the 512 Kbytes ATCM + 32 Kbytes BTCM, both of which also include ECC. The R7S910021CBG#AC0 uses this SRAM for safety-critical data buffers and firmware execution without external memory dependency.

Which A/D converter specifications apply to the R7S910021CBG#AC0?

The R7S910021CBG#AC0 includes two independent 12-bit A/D converters: S12ADCa unit 0 (8 channels, 0.483 µs conversion time at 3.0–3.6 V) and unit 1 (8 channels, 0.883 µs). Both support self-diagnosis, analog input disconnection detection, and trigger sources including software, TPUa, and external pins. The R7S910021CBG#AC0 routes AN000–AN007 and AN100–AN107 to dedicated analog input pins with separate reference supplies (VREFH0/VREFL0, VREFH1/VREFL1).

What safety features are implemented in the R7S910021CBG#AC0?

The R7S910021CBG#AC0 incorporates register write protection, input clock oscillation stop detection, CRC calculator (8/16/32-bit), independent watchdog timer (IWDTa), clock monitor circuit (CLMA), and a duplicated error control module (ECM). The ECM generates interrupts, internal resets, or pin signals in response to module errors. These features are validated for use in IEC 61508 SIL2 applications, and the R7S910021CBG#AC0 includes documentation supporting functional safety certification.

Is the MDIO interface on the R7S910021CBG#AC0 configurable as master or slave?

The R7S910021CBG#AC0 implements MDIO exclusively in slave mode (4 MHz max), compliant with IEEE 802.3 clause 45 for optical transceiver management per CFP MSA. It does not support MDIO master operation. For master-capable variants, consider R7S910022CBG#AC0 or R7S910023CBG#AC0 - the R7S910021CBG#AC0 is optimized for passive monitoring and configuration of optical modules without host-driven DSP control.