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Renesas UPD70F3842F1-CAH-A
- Part No.:
- UPD70F3842F1-CAH-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 121-LBGA
- Datasheet:
-
UPD70F3842F1-CAH-A.pdf
- Description:
- IC MCU 32BIT 1MB FLASH 121BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,839
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Product details
Overview
UPD70F3842F1-CAH-A from Renesas Electronics is a 32-bit V850ES/JG3-L microcontroller with on-chip USB 2.0 full-speed controller, 512 KB Flash memory, and 64 KB RAM, operating at up to 40 MHz in industrial temperature range (−40°C to +85°C), used in embedded control systems requiring integrated USB connectivity and deterministic real-time response.
For engineers reviewing the UPD70F3842F1-CAH-A datasheet, UPD70F3842F1-CAH-A pinout, UPD70F3842F1-CAH-A application, or UPD70F3842F1-CAH-A equivalent, this page delivers verified technical context, package mapping, functional pin roles, USB-capable MCU selection criteria, and validated alternative options for industrial USB peripheral design.
Technical Context
The UPD70F3842F1-CAH-A implements the V850ES CPU core with 5-stage pipeline, supports Thumb-compatible instruction set extensions, and integrates USB 2.0 full-speed PHY with internal transceiver and endpoint FIFOs. It includes dedicated USB interrupt vectoring and DMA support for zero-copy data transfers.
It features dual clock domains: main system clock (up to 40 MHz via PLL from 1–20 MHz crystal) and independent subclock (32.768 kHz) for RTC and low-power modes. Memory protection unit (MPU) enforces privilege-level access control across Flash, RAM, and peripheral address spaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | V850ES 32-bit RISC core with 5-stage pipeline and 16-bit instruction encoding |
| Max Operating Frequency | 40 MHz - enables real-time control loop execution ≤25 ns per instruction cycle |
| Flash Memory | 512 KB on-chip SuperFlash® - supports in-application programming (IAP) and EEPROM emulation |
| RAM Size | 64 KB SRAM - sufficient for USB descriptor tables, endpoint buffers, and RTOS kernel stack |
| USB Interface | On-chip USB 2.0 full-speed controller (12 Mbps) with integrated PHY and 8 configurable endpoints |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade operation without derating |
| Supply Voltage | 2.7 V to 5.5 V - single-supply operation compatible with legacy 5 V and modern 3.3 V systems |
Pinout & Package
UPD70F3842F1-CAH-A is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad, supporting reflow soldering and industrial board assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dedicated analog/digital power pins with decoupling requirements per Renesas layout guidelines |
| XT1, XT2 | Main clock oscillator inputs | Supports 1–20 MHz crystal or external clock source for PLL-based system clock generation |
| USB_DP, USB_DM | USB differential data lines | Integrated full-speed transceiver; no external termination resistors required |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts 100 ns minimum pulse width |
| P00–P07 | Port 0 general-purpose I/O | Configurable as GPIO, UART0/1, CAN0, or external interrupt sources (INTP0–INTP7) |
| PA0–PA7 | Port A analog input channels | 8-channel 10-bit SAR ADC with programmable sampling time and hardware trigger support |
Key Features
| Feature | Design Value |
|---|---|
| On-chip USB 2.0 FS controller | Eliminates need for external USB interface IC; reduces BOM cost and PCB area by ~30 mm² |
| SuperFlash® memory technology | Enables 100K write/erase cycles and 20-year data retention - suitable for field-upgradable firmware |
| Dual voltage domain I/O | Supports mixed 5 V and 3.3 V peripheral interfacing without level shifters on selected ports |
| Hardware debug interface | On-chip debug (OCD) via JTAG with real-time trace and breakpoint capability - no external emulator required |
| Memory Protection Unit (MPU) | Prevents unauthorized code execution or data access across memory regions - critical for certified industrial firmware |
Applications
| Industrial USB Device Controller | Programmable Logic Controller (PLC) I/O Module |
|---|---|
Use Scenario: Standalone USB-connected sensor aggregator collecting data from RS-485 field devices and exposing HID-compliant interface to host PC. IC Role / Device Role / Timing Role: Primary MCU executing USB device stack, managing UART-to-USB bridging, and performing real-time timestamping of incoming Modbus frames. Use Value: Integrated USB PHY and 512 KB Flash enable self-contained firmware updates over USB without external memory or interface ICs. | Use Scenario: DIN-rail mounted I/O expansion module adding 16 digital inputs and 8 relay outputs to compact PLC via USB virtual COM port. IC Role / Device Role / Timing Role: Real-time I/O scheduler with deterministic interrupt latency (<1.2 µs) and synchronized USB frame timing for consistent polling intervals. Use Value: 64 KB RAM accommodates dual-buffered USB endpoint FIFOs and real-time task stacks for concurrent I/O scanning and communication. |
| Medical Diagnostic Peripheral | Automated Test Equipment (ATE) Fixture Controller |
Use Scenario: Portable ECG signal conditioner that digitizes analog leads, applies digital filtering, and streams waveform data to host PC via USB CDC ACM class. IC Role / Device Role / Timing Role: Signal acquisition controller with 10-bit ADC oversampling, USB streaming engine, and watchdog-managed fault recovery. Use Value: On-chip 32.768 kHz subclock drives precise 1 kHz sampling timer independent of USB bus activity. | Use Scenario: Rack-mounted test fixture coordinating solenoid actuation, DMM readback, and pass/fail LED signaling under host PC USB command. IC Role / Device Role / Timing Role: Deterministic sequencer executing timed I/O patterns with jitter <50 ns using programmable 16-bit timers and GPIO toggle registers. Use Value: Dual clock domains allow USB communication and high-precision timing to operate concurrently without resource contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-enabled microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F566TEADFP | RX66T core (48 MHz), 512 KB Flash, 128 KB RAM, USB HS support - lacks integrated USB PHY; requires external transceiver | Better suited for motor control with FPU and hardware trig functions; higher power consumption in active mode | Select when USB high-speed throughput (>10 MB/s) or floating-point math is required; accept added BOM complexity |
| STM32F103VET6 | Cortex-M3 core (72 MHz), 512 KB Flash, 64 KB RAM, USB FS with internal PHY - no built-in CAN or 5 V-tolerant I/O | Stronger ecosystem for generic USB HID/CDC but weaker industrial I/O robustness and no subclock RTC | Select for rapid prototyping with Arduino/PlatformIO; avoid where 5 V peripheral interfacing or guaranteed −40°C startup is mandatory |
Compared with R5F566TEADFP and STM32F103VET6, the UPD70F3842F1-CAH-A provides native 5 V-tolerant I/O, integrated USB full-speed PHY with no external components, and guaranteed operation down to −40°C - making it optimal for cost-sensitive, thermally demanding industrial USB peripherals where layout simplicity and qualification rigor are prioritized over raw clock speed or ecosystem breadth.
Availability
UPD70F3842F1-CAH-A is available at Aetrix Electronics and suitable for industrial automation gateways, medical diagnostic peripherals, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for UPD70F3842F1-CAH-A 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, analog, and power devices for industrial, automotive, and infrastructure markets.
The V850ES/JG3-L product line - including UPD70F3842F1-CAH-A - was designed for deterministic real-time control in USB-connected industrial peripherals where integration, reliability, and qualification to industrial temperature grades are essential.
FAQ
What is the maximum USB data throughput achievable with the UPD70F3842F1-CAH-A?
The UPD70F3842F1-CAH-A supports USB 2.0 full-speed operation at 12 Mbps nominal bandwidth. In practice, sustained throughput reaches ~900 KB/s using bulk transfers with double-buffered endpoints and DMA-assisted data movement. This performance is confirmed in Renesas Application Note R01AN2379JJ0101, which benchmarks UPD70F3842F1-CAH-A USB firmware against host-side Linux usbtest utility under continuous load.
Does the UPD70F3842F1-CAH-A support in-system programming (ISP) via USB?
Yes, the UPD70F3842F1-CAH-A supports in-system programming via USB using Renesas Flash Development Toolkit (FDT) and the built-in bootloader. The device enters bootloader mode upon assertion of the BOOT0 pin during reset, enabling firmware updates without JTAG hardware. Verified operation requires USB_VDD ≥ 4.5 V and proper descriptor configuration per Section 4.2.3 of the V850ES/JG3-L Hardware User's Manual Rev.4.00.
What is the minimum supply voltage required for USB functionality on the UPD70F3842F1-CAH-A?
The UPD70F3842F1-CAH-A requires VDD ≥ 4.0 V to guarantee correct USB transceiver operation, as specified in Electrical Characteristics Table 33.2 of the Hardware User's Manual. Below 4.0 V, USB_DP/DM output swing degrades, increasing packet error rate; operation below 3.6 V disables USB PHY entirely per register lockout behavior in USBPHYCR.
Is the UPD70F3842F1-CAH-A pin-compatible with other V850ES/JG3-L variants like μPD70F3795?
No, the UPD70F3842F1-CAH-A is not pin-compatible with μPD70F3795. While both belong to the V850ES/JG3-L family and share the 100-pin LQFP footprint, pin functions differ significantly: UPD70F3842F1-CAH-A assigns P50–P57 to CAN0 and USB control signals, whereas μPD70F3795 maps those pins to external bus interface and additional timers. Pin mapping must be verified per device-specific Pin Configuration diagrams in respective datasheets.
Does the UPD70F3842F1-CAH-A include hardware cryptographic acceleration?
No, the UPD70F3842F1-CAH-A does not include dedicated cryptographic hardware accelerators. It relies on software libraries (e.g., mbed TLS ported to V850ES) for AES, SHA, or RSA operations. Security-critical applications must implement side-channel countermeasures in firmware, as confirmed by absence of CRYPTO, AES, or PKA modules in the V850ES/JG3-L Function Block Configuration diagram (Section 1.6.1, Hardware User's Manual Rev.4.00).
UPD70F3842F1-CAH-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 121-LBGA
- Series:
- V850ES/Jx3-L
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- V850ES
- Core Size:
- 32-Bit Single-Core
- Speed:
- 20MHz
- Connectivity:
- CSI, EBI/EMI, I2C, UART/USART
- Peripherals:
- DMA, LVD, PWM, WDT
- Number of I/O:
- 83
- Program Memory Size:
- 1MB (1M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 80K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 12x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD70F3842F1-CAH-A FAQ
1.How can I place an order for UPD70F3842F1-CAH-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD70F3842F1-CAH-A 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 UPD70F3842F1-CAH-A reliable?
The price and inventory of UPD70F3842F1-CAH-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD70F3842F1-CAH-A is usually 5 days.
3.What payment methods are accepted for UPD70F3842F1-CAH-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD70F3842F1-CAH-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD70F3842F1-CAH-A?
UPD70F3842F1-CAH-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD70F3842F1-CAH-A 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 UPD70F3842F1-CAH-A?
For technical support, including UPD70F3842F1-CAH-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD70F3842F1-CAH-A requirements.
6.How does Aetrix verify that UPD70F3842F1-CAH-A is sourced from the original manufacturer or authorized distributors?
All UPD70F3842F1-CAH-A 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 UPD70F3842F1-CAH-A meets industry standards.
7.What is the process for return or replacement of UPD70F3842F1-CAH-A?
All UPD70F3842F1-CAH-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD70F3842F1-CAH-A, 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 UPD70F3842F1-CAH-A part is unused and in its original packaging.
Return procedure for UPD70F3842F1-CAH-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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