Renesas M38049FFHP#U0

Overview

M38049FFHP#U0 from Renesas Technology Corp. is an 8-bit CMOS microcomputer based on the 740 family core, featuring 60 KB flash memory, 2048 bytes RAM, 10-bit A-D converter (16 channels), I²C-BUS interface, and LED direct-drive ports (P20–P27). It operates from 2.7 V to 5.5 V and targets embedded control in household appliances and office automation equipment requiring analog signal processing.

For engineers reviewing the M38049FFHP#U0 datasheet, M38049FFHP#U0 pinout, M38049FFHP#U0 application, or M38049FFHP#U0 equivalent, key selection considerations include its 64-pin LQFP package, flash programmability (100 erase/write cycles), integrated dual D-A converters, 23 interrupt sources with 16 vectors, and I²C support for sensor/EEPROM interfacing in resource-constrained systems.

Technical Context

The M38049FFHP#U0 implements the standard 740 Family instruction set (71 instructions), with CPU registers including 8-bit accumulator A, index registers X/Y, 8-bit stack pointer S, and 16-bit program counter PC. It supports both internal clock generation (via ceramic resonator or quartz crystal) and external clock input.

Its peripheral architecture includes three serial I/O modules (UART or clock-synchronized), a 16-bit timer Z, four 8-bit timers (X, Y, 1, 2) with 8-bit prescalers, watchdog timer, PWM output, and dedicated LED drive capability on port P2 - all managed via bit-programmable I/O direction registers and software-configurable pull-up resistors.

Key Specifications

Pinout & Package

Package: 64-pin 10 × 10 mm LQFP (64P6Q-A), lead pitch 0.5 mm, exposed pad not specified, JEDEC MS-026 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#30 and MB95F572KPMC-GSE1, the M38049FFHP#U0 delivers optimal balance of analog integration, LED drive capability, and flash-based field update support in a mature, cost-sensitive 8-bit platform - ideal for legacy-compatible, high-volume appliance designs where pin count and BOM simplicity are critical.

Availability

M38049FFHP#U0 is available at Aetrix Electronics and suitable for home appliance control, office automation equipment, and industrial sensor nodes requiring stable component supply across multi-year production cycles.

Supply support for M38049FFHP#U0 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 Technology Corp. (now part of Renesas Electronics Corporation) is a Japanese semiconductor manufacturer formed in 2003 from the merger of Hitachi and Mitsubishi Electric's semiconductor operations.

The 3803/3804 Group was designed specifically for cost-sensitive, analog-intensive embedded control applications in consumer electronics - emphasizing integrated A-D/D-A, LED drive, and flash programmability within a proven 740-family architecture.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for the M38049FFHP#U0?

The M38049FFHP#U0 supports a maximum oscillation frequency of 16.8 MHz, requiring a supply voltage of 4.5–5.5 V. At 12.5 MHz, it operates from 4.0–5.5 V, and at 8.38 MHz or 32 kHz, the range expands to 2.7–5.5 V - though the flash memory version mandates minimum 4.0 V for reliable programming and execution. This flexibility enables dynamic voltage/frequency scaling for power optimization.

Does the M38049FFHP#U0 support in-system programming, and what voltage is required for flash writes?

Yes, the M38049FFHP#U0 supports in-system programming via on-chip flash memory. Flash write/erase operations require VPP = 11.7–12.6 V applied to the CNVSS pin (which becomes the VPP input in flash versions), while normal operation uses VCC = 4.0–5.5 V. Programming is performed byte-wise, and erasure supports both batch (parallel/serial I/O mode) and block (CPU reprogramming mode) methods - enabling field firmware updates without chip removal.

How many interrupt sources does the M38049FFHP#U0 have, and what is the vector structure?

The M38049FFHP#U0 provides 23 interrupt sources organized into 16 vector addresses - comprising 9 external (INT00, INT01, INT1, INT2, INT3, INT40, INT41, plus two reserved), 13 internal (including A-D conversion end, serial I/O, timer overflows, I²C events), and 1 software interrupt. Each vector points to a unique service routine address, allowing deterministic real-time response without polling overhead - critical for time-sensitive appliance control loops.

Can the M38049FFHP#U0's P20–P27 pins directly drive common-anode LED displays, and what current capability do they offer?

Yes, P20–P27 on the M38049FFHP#U0 are explicitly designed for LED direct drive, supporting both common-anode and common-cathode configurations. While exact sink/source current values are not specified in the provided documentation, their designation as "LED drive port" with "large current" capability implies significantly higher output drive than standard GPIO - sufficient for multiplexed 7-segment displays without external transistors. Designers should verify actual current limits per pin against layout thermal constraints.

Is the I²C-BUS interface on the M38049FFHP#U0 compatible with standard 100 kbps and 400 kbps modes, and are external pull-ups required?

Yes, the I²C-BUS interface on the M38049FFHP#U0 (pins P32/SDA and P33/SCL) supports standard-mode (100 kbps) and fast-mode (400 kbps) operation per I²C specification. Because these pins are N-channel open-drain outputs, external pull-up resistors to VCC are mandatory - typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed requirements. No internal pull-ups are enabled by default; configuration is software-controlled.