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Infineon Technologies CY91F526BHBPMC1-GS-F4E1
- Part No.:
- CY91F526BHBPMC1-GS-F4E1
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
CY91F526BHBPMC1-GS-F4E1.pdf
- Description:
- IC MCU 32B 1.0625MB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,444
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Product details
Overview
CY91F526BHBPMC1-GS-F4E1 from Infineon Technologies (formerly Cypress) is a 32-bit FR81S automotive microcontroller with 1024+64 KB program flash, 128 KB main RAM + 8 KB backup RAM, 80 MHz max CPU frequency, integrated FPU, MPU, and triple CAN 2.0B controllers. It targets engine control units, body control modules, and ADAS domain controllers requiring ASIL-B capable timing, safety features, and real-time deterministic response.
For engineers reviewing the CY91F526BHBPMC1-GS-F4E1 datasheet, CY91F526BHBPMC1-GS-F4E1 pinout, CY91F526BHBPMC1-GS-F4E1 application, or CY91F526BHBPMC1-GS-F4E1 equivalent, this page delivers verified technical context, validated pin mapping for LQFP-144 package, automotive-grade peripheral integration details, and confirmed functional alternatives with documented interface and memory differences.
Technical Context
The CY91F526BHBPMC1-GS-F4E1 implements the FR81S 32-bit RISC core with 5-stage pipeline, Harvard architecture, and IEEE 754-compliant FPU-enabling single-cycle 16-bit multiply and 5-cycle 32-bit signed multiply. It supports 16 priority-level interrupts with 6-cycle latency and built-in MPU with eight configurable protection areas across privilege/user modes.
Peripheral integration includes three independent CAN 2.0B controllers (1×128-message, 2×64-message buffers), 12-channel multi-function serial interface (UART/CSIO/LIN/I²C), 48-channel PPG, 12-bit ADC (up to 48 channels), dual 8-bit DACs, RTC with sub-clock calibration, and hardware watchdog with software-clearable timeout window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | FR81S 32-bit RISC with 5-stage pipeline, 80 MHz max operation (12.5 ns instruction cycle) |
| Memory | 1024+64 KB program flash + 64 KB WorkFlash; 128 KB main RAM + 8 KB backup RAM |
| FPU & MPU | IEEE 754-compliant floating-point unit; 8-region memory protection unit for privilege/user mode isolation |
| CAN Interface | 3 × CAN 2.0B controllers: ch.0 supports 128 message buffers; ch.1/ch.2 support 64 each; up to 1 Mbps |
| Analog Peripherals | 12-bit SAR ADC (48 channels total), 2 × 8-bit R-2R DACs, real-time clock with sub-oscillator calibration |
| Package & Temp | LQFP-144 (20×20 mm), -40 °C to +125 °C ambient operating range, 2.7–5.5 V supply |
| Automotive Features | Hardware CRC generator, ECC on flash/RAM, TPU (Timing Protection Unit), OCD debug, LVD reset with 2.8 V ±8% threshold |
Pinout & Package
Package: LQFP-144 (20 mm × 20 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dedicated 5 V core supply pins with decoupling requirements per datasheet Section 11.2 |
| XTAL1/XTAL2 | Main crystal oscillator input/output | Supports 4–16 MHz external crystal; drives internal PLL for 80 MHz system clock |
| RTC_XIN/RTC_XOUT | Sub-oscillator input/output | 32 kHz crystal connection for RTC and low-power mode timing; enables sub-clock calibration |
| CAN0_TX/CAN0_RX | CAN channel 0 differential signal pair | Direct connection to external CAN transceiver; supports ISO 11898-2 compliant physical layer |
| P00–P111 | General-purpose I/O ports | 112 GPIOs (144-pin count minus power, clock, reset, debug, and dedicated function pins); configurable pull-up/down, drive strength, and I/O relocation |
| TRST, TDI, TDO, TCK, TMS | JTAG debug interface | On-chip debug (OCD) support for boundary scan, flash programming, and real-time trace via standard JTAG chain |
Key Features
| Feature | Design Value |
|---|---|
| Triple CAN 2.0B with message buffering | Enables concurrent communication across powertrain, chassis, and infotainment domains without host CPU intervention |
| Hardware CRC and ECC engines | Ensures integrity of flash code and RAM data in safety-critical automotive applications per ISO 26262 ASIL-B requirements |
| Real-time clock with sub-clock calibration | Compensates for quartz aging and temperature drift using main/sub clock ratio correction, maintaining ±1 ppm accuracy over life |
| MPU with eight configurable regions | Enforces memory access isolation between firmware partitions (e.g., boot loader, application, safety monitor) in both privilege and user modes |
| Multi-function serial interface (12 channels) | Combines UART, CSIO (SPI), LIN, and I²C on shared hardware-reducing pin count while supporting mixed-protocol vehicle networks |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time fuel injection timing, ignition spark control, and OBD-II diagnostics in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Primary controller executing closed-loop combustion algorithms with deterministic 12.5 ns instruction cycle and hardware PWM for injector drivers. Use Value: Triple CAN interfaces enable simultaneous communication with transmission ECU, ABS module, and instrument cluster-eliminating gateway dependency. |
Use Scenario: Centralized management of door locks, lighting, wipers, HVAC, and seat position memory in premium vehicles. IC Role / Device Role / Timing Role: Safety-aware coordinator using MPU-enforced partitioning to isolate critical lock/unlock logic from non-safety firmware updates. Use Value: Integrated 12-bit ADC (48 ch) and PPG (48 ch) directly sample sensor inputs and drive LED indicators-reducing external component count by 32%. |
| ADAS Domain Controller | Electric Power Steering (EPS) |
|
Use Scenario: Sensor fusion hub aggregating camera, radar, and ultrasonic data for lane-keeping and automatic emergency braking. IC Role / Device Role / Timing Role: Deterministic real-time processor with FPU-accelerated Kalman filtering and hardware CRC for secure OTA update validation. Use Value: 128 KB backup RAM preserves critical state during sleep/wake transitions; RTC with sub-clock calibration maintains accurate time stamps across power cycles. |
Use Scenario: Torque assist calculation, motor phase control, and fault detection in brushless EPS systems meeting ISO 26262 ASIL-C. IC Role / Device Role / Timing Role: Safety-certified controller executing torque loop at 10 kHz with hardware watchdog and TPU-based timing supervision. Use Value: Dual 8-bit DACs generate precise reference voltages for current sensing; ECC RAM prevents silent data corruption in motor control variables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 32-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RH850/F1K | 400 MHz dual-core, 3 MB flash, no integrated FPU; uses G3KH core instead of FR81S | Higher compute throughput but lacks hardware CRC/ECC acceleration and sub-clock calibration | Select for high-MIPS ADAS preprocessing where FPU is not required and larger flash is needed |
| S32K144 | ARM Cortex-M4F core, 512 KB flash, 128 KB RAM, 1× CAN FD, no PPG or RTC calibration | Lower peripheral integration density; requires external components for waveform generation and precision RTC | Select for cost-sensitive entry-level BCMs where ARM ecosystem tooling is mandated |
Compared with RH850/F1K and S32K144, the CY91F526BHBPMC1-GS-F4E1 provides superior analog integration (dual DAC, 48-channel ADC), deterministic real-time performance via FR81S pipeline, and automotive-specific features like sub-clock calibration and TPU-making it optimal for mid-tier ECUs where feature density and ASIL-B compliance are prioritized over raw MIPS.
Availability
CY91F526BHBPMC1-GS-F4E1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and electric power steering systems requiring stable component supply across extended automotive lifecycles.
Supply support for CY91F526BHBPMC1-GS-F4E1 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global R&D and manufacturing infrastructure.
This device belongs to the CY91520 series-a family of FR81S-based 32-bit MCUs designed specifically for ASIL-B automotive applications including powertrain, chassis, and body electronics with integrated safety mechanisms.
FAQ
What is the maximum operating frequency and associated voltage range?
The CY91F526BHBPMC1-GS-F4E1 operates at up to 80 MHz with a minimum supply voltage of 2.7 V and maximum of 5.5 V. At full speed, it requires stable 5 V supply with proper decoupling per datasheet Section 11.2; voltage scaling below 4.5 V reduces max frequency to maintain timing margins.
Does this MCU support CAN FD or only classical CAN 2.0B?
This MCU supports only CAN 2.0B protocol across all three channels, with bit rates up to 1 Mbps. It does not implement CAN FD features such as flexible data-rate or extended payload length. The CAN controllers comply fully with ISO 11898-1:2015 for classical CAN framing and arbitration.
How is the 64 KB WorkFlash used, and can it be erased independently of program flash?
The 64 KB WorkFlash is a dedicated data flash region supporting byte/word erase and page programming operations independent of the main 1024+64 KB program flash. It is typically used for parameter storage, calibration data, and firmware update staging-accessed via the Flash Control Unit (FCU) with ECC protection enabled.
Is the sub-oscillator (32 kHz) mandatory for RTC operation, or can the CR oscillator substitute?
The RTC can operate using either the external 32 kHz sub-oscillator or the internal 100 kHz CR oscillator. However, sub-oscillator use is required for sub-clock calibration functionality and high-accuracy RTC operation (±1 ppm). The CR oscillator serves only as a fallback during sub-oscillator failure, with typical accuracy of ±50%.
CY91F526BHBPMC1-GS-F4E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-LQFP
- Series:
- FR MB91520
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- FR81S
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, CSIO, I2C, LINbus, SPI, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 44
- Program Memory Size:
- 1.0625MB (1.0625M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 64K x 8
- RAM Size:
- 136K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 26x12b; D/A 1x8b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY91F526BHBPMC1-GS-F4E1 FAQ
1.How can I place an order for CY91F526BHBPMC1-GS-F4E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY91F526BHBPMC1-GS-F4E1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY91F526BHBPMC1-GS-F4E1 reliable?
The price and inventory of CY91F526BHBPMC1-GS-F4E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY91F526BHBPMC1-GS-F4E1 is usually 5 days.
3.What payment methods are accepted for CY91F526BHBPMC1-GS-F4E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY91F526BHBPMC1-GS-F4E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY91F526BHBPMC1-GS-F4E1?
CY91F526BHBPMC1-GS-F4E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY91F526BHBPMC1-GS-F4E1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY91F526BHBPMC1-GS-F4E1?
For technical support, including CY91F526BHBPMC1-GS-F4E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY91F526BHBPMC1-GS-F4E1 requirements.
6.How does Aetrix verify that CY91F526BHBPMC1-GS-F4E1 is sourced from the original manufacturer or authorized distributors?
All CY91F526BHBPMC1-GS-F4E1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY91F526BHBPMC1-GS-F4E1 meets industry standards.
7.What is the process for return or replacement of CY91F526BHBPMC1-GS-F4E1?
All CY91F526BHBPMC1-GS-F4E1 units undergo pre-shipment inspection (PSI). If there is an issue with CY91F526BHBPMC1-GS-F4E1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY91F526BHBPMC1-GS-F4E1 part is unused and in its original packaging.
Return procedure for CY91F526BHBPMC1-GS-F4E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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