My Inquiry
My Account
Renesas M308B8SGP
- Part No.:
- M308B8SGP
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 144-LQFP
- Datasheet:
-
M308B8SGP.pdf
- Description:
- IC MCU 16/32BIT 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,648
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M308B8SGP from Renesas Electronics is a ROMless 144-pin LQFP microcontroller in the M32C/8B Group, featuring the M32C/80 CPU core, 32 KB RAM, 32 MHz operation at 3.0–5.5 V, and integrated peripherals including 34-channel 10-bit ADC, dual 8-bit DAC, five UARTs, I²C, and timer-based 3-phase motor control-used in industrial PLCs and home appliance main controllers.
For engineers reviewing the M308B8SGP datasheet, M308B8SGP pinout, M308B8SGP application, or M308B8SGP equivalent, this page delivers verified technical context, package-confirmed pin functions, real-world use scenarios, and two validated alternative parts for embedded control design where external program memory is required.
Technical Context
The M308B8SGP implements the M32C/80 16-bit CPU core with 108 basic instructions and 31.3 ns minimum instruction execution time at 32 MHz. It supports three operating modes-single-chip, memory expansion, and microprocessor-with 16-Mbyte address space and configurable 8-/16-bit external bus interface.
Its peripheral set includes DMAC (4 channels), DMACII (burst/chain transfer), five UARTs with multiple synchronous/asynchronous modes, I²C, CRC-CCITT engine, X/Y converter, and dedicated 3-phase inverter control logic using Timer A and Timer B resources-enabling real-time motor drive without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M32C/80 16-bit core with 16×16→32-bit multiplier and 16×16+48→48-bit multiply-add; enables efficient math-intensive control loops. |
| Memory | ROMless configuration with 32 KB on-chip RAM; requires external Flash or EEPROM for program storage. |
| ADC | 10-bit resolution × 34 channels (single-chip mode); supports simultaneous sampling of analog sensors in HVAC or motor feedback systems. |
| DAC | 8-bit × 2 channels; provides analog setpoint or bias generation for actuator drivers or audio signal conditioning. |
| Timers | Timer A (5×16-bit) + Timer B (6×16-bit) with 2-phase encoder input, PWM, dead-time insertion, and 3-phase inverter control mode. |
| Serial Interfaces | 5 UARTs (with SDA/SCL/STXD support), I²C bus, and optional IEBus; enables multi-protocol communication with displays, sensors, and legacy subsystems. |
| Package | 144-pin LQFP (PLQP0144KA-A); provides 121 CMOS I/O pins in single-chip mode, supporting high-pin-count industrial I/O expansion. |
Pinout & Package
144-pin LQFP (PLQP0144KA-A) with exposed thermal pad; 20 mm × 20 mm body, 0.5 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Port 0 data/analog inputs | 8-bit bidirectional port with AN0_0–AN0_7 analog inputs; used for sensor digitization or general-purpose I/O. |
| P9_0–P9_7 | UART4/CLK4/ADTRG multiplexed pins | Support full-duplex UART4, clock output, and ADC trigger; enables synchronized analog acquisition with serial telemetry. |
| P10_0–P10_7 | Analog input / key interrupt pins | 8-channel analog input (AN_0–AN_7) with key interrupt capability (KI0–KI3); ideal for front-panel user interface sensing. |
| P15_0–P15_7 | Additional analog inputs | 8-channel AN15_0–AN15_7; extends total ADC channel count to 34 in single-chip mode for multi-sensor systems. |
| P5_0–P5_7 | External bus control signals | WR, RD, ALE, HOLD, HLDA, RDY; enable memory-mapped peripheral or external program memory interfacing. |
| XIN/XOUT | Main crystal oscillator terminals | Drive external 1–20 MHz crystal; sets system clock base for PLL frequency synthesis and timing-critical peripherals. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip debug & flash reprogram | Enables field firmware updates and real-time debugging without external emulator-reducing development cycle time. |
| 3-phase inverter control logic | Hardware-accelerated gate timing with programmable dead time prevents shoot-through in motor driver stages. |
| DMACII burst/chain transfer | Allows zero-CPU-overhead movement of ADC data blocks or UART buffers-critical for deterministic real-time response. |
| Voltage monitor interrupt | Generates NMI on VCC1 undervoltage detection, enabling safe shutdown or brown-out recovery in power-sensitive applications. |
| Low-power wait/stop modes | 4 μA stop-mode current enables battery-backed operation in standby states for smart appliances and remote controllers. |
Applications
| Air Conditioner Main Controller | Industrial Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Real-time monitoring of temperature, humidity, and compressor current with closed-loop inverter-driven fan and compressor control. IC Role / Device Role / Timing Role: Central control unit executing PID algorithms, managing 3-phase motor drive via hardware timers, and coordinating I²C sensor reads and UART HMI updates. Use Value: Integrated 3-phase control logic and 34-channel ADC eliminate external timing ICs and analog front-end components-reducing BOM cost and board area. | Use Scenario: Deterministic scanning of discrete I/O modules, analog process variables, and communication with SCADA over RS-485. IC Role / Device Role / Timing Role: Main processor handling ladder logic execution, high-speed counter inputs, and dual UARTs for Modbus RTU master/slave operation. Use Value: DMACII burst transfers move I/O image data between RAM and peripheral registers without CPU intervention-ensuring sub-10 ms scan cycles. |
| Washing Machine Motor Drive Board | Audio/Visual Equipment System Controller |
Use Scenario: Precise speed/torque control of brushless DC drum motor with hall-effect feedback and water-level pressure sensing. IC Role / Device Role / Timing Role: Real-time motor commutation controller using Timer A/B event counters and PWM outputs with hardware dead-time insertion. Use Value: On-chip dead-time timer and 2-phase encoder input eliminate external gate-driver protection logic-improving reliability and reducing component count. | Use Scenario: Managing display backlight, IR remote decoding, audio codec configuration, and HDMI CEC messaging in AV receivers. IC Role / Device Role / Timing Role: System management MCU handling multiple low-bandwidth protocols (I²C, UART, IR), power sequencing, and thermal monitoring. Use Value: Five UARTs with SIM/GCI modes support legacy IR transceivers and modern audio DSP interfaces simultaneously-avoiding protocol translation ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F566TEADFP | RX66T 32-bit core, 1.8–5.5 V supply, 1 MB Flash, 128 KB RAM; no ROMless option; higher performance but larger footprint. | Targets next-gen industrial inverters requiring FPU and EtherCAT; not drop-in due to different pinout and voltage tolerance. | Select when migrating to 32-bit architecture with safety certification needs (IEC 61508 SIL2). |
| M30626FGFP | M16C/62 Series, 100-pin LQFP, 256 KB Flash, 16 KB RAM; lacks 3-phase control hardware and DMACII. | Suitable for simpler appliance UI or sensor concentrators-not for motor control; lower cost but reduced peripheral integration. | Choose for cost-sensitive, non-motor applications where external Flash is undesirable and 3-phase features are unused. |
Compared with R5F566TEADFP and M30626FGFP, the M308B8SGP uniquely balances ROMless flexibility, 144-pin I/O density, and hardware-accelerated 3-phase motor control-making it optimal for legacy-compatible industrial designs requiring external program storage and deterministic timing.
Availability
M308B8SGP is available at Aetrix Electronics and suitable for industrial PLCs, home appliance main controllers, HVAC system boards, and audio/video equipment requiring stable component supply across long production lifecycles.
Supply support for M308B8SGP 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 consumer markets.
The M32C/8B Group was designed for cost-effective, high-integration embedded control in white goods, office automation, and industrial equipment-emphasizing real-time peripheral acceleration and low-power operation.
FAQ
What is the memory configuration of the M308B8SGP?
The M308B8SGP is a ROMless microcontroller with 32 KB of on-chip RAM and no internal Flash or ROM. It relies on external memory for program storage, making it suitable for systems where firmware is updated in-field or stored in separate non-volatile memory. This configuration is confirmed in Table 1.5 of the M32C/8B Group datasheet (REJ03B0242-0100), which lists M308B8SGP under "S: ROMless version" with "− / 32 KB" memory capacity.
Which package does the M308B8SGP use, and what are its key mechanical properties?
The M308B8SGP uses the 144-pin LQFP package designated PLQP0144KA-A (144P6Q-A), measuring 20 mm × 20 mm with 0.5 mm pin pitch and RoHS compliance. This package supports 121 CMOS I/O pins in single-chip mode and includes dedicated analog input pins (AN0–AN15), external bus signals (CS0–CS3, RD, WR), and oscillator connections (XIN/XOUT). The package type is explicitly stated in Table 1.5 and Figure 1.3 of the official Renesas datasheet.
Does the M308B8SGP support hardware 3-phase motor control, and how is it implemented?
Yes, the M308B8SGP supports hardware-accelerated 3-phase inverter control using Timer A (channels A1, A2, A4) and Timer B (channel B2) with on-chip dead-time insertion logic. This eliminates external gate-driver protection circuitry and ensures precise, jitter-free PWM timing critical for BLDC and PMSM drives. The feature is documented in Tables 1.1 and 1.3 under "Timer function for 3-phase motor control" and confirmed in the block diagram (Figure 1.2).
What serial communication interfaces are available on the M308B8SGP?
The M308B8SGP integrates five UART channels (UART0–UART4), each supporting clock-synchronous and asynchronous modes, plus I²C bus, special mode 2, GCI mode, SIM mode, and optional IEBus. UART4 is multiplexed on P9_0–P9_7 and supports STXD4/RXD4/SCL4/ADTRG functions. These interfaces are specified in Tables 1.1 and 1.3 under "Serial Interface" and verified in the pin assignment tables (Tables 1.6–1.8).
What is the maximum operating frequency and supply voltage range for the M308B8SGP?
The M308B8SGP operates at up to 32 MHz with a supply voltage range of VCC1 = 3.0 V to 5.5 V and VCC2 = 3.0 V to VCC1. Minimum instruction execution time is 31.3 ns at 32 MHz, and current consumption is 26 mA (5 V) or 23 mA (3.3 V) under full load. These values are specified in Tables 1.1 and 1.3 under "Operating Frequency / Supply Voltage" and "Current Consumption" sections of the Renesas datasheet REJ03B0242-0100.
M308B8SGP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 144-LQFP
- Series:
- M16C™ M32C/80/8B
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- M32C/80
- Core Size:
- 16/32-Bit
- Speed:
- 32MHz
- Connectivity:
- EBI/EMI, I2C, IEBus, UART/USART
- Peripherals:
- DMA, WDT
- Number of I/O:
- 81
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 18x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
M308B8SGP FAQ
1.How can I place an order for M308B8SGP through Aetrix?
Please submit a Request for Quotation (RFQ) for M308B8SGP 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 M308B8SGP reliable?
The price and inventory of M308B8SGP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M308B8SGP is usually 5 days.
3.What payment methods are accepted for M308B8SGP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M308B8SGP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M308B8SGP?
M308B8SGP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M308B8SGP 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 M308B8SGP?
For technical support, including M308B8SGP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M308B8SGP requirements.
6.How does Aetrix verify that M308B8SGP is sourced from the original manufacturer or authorized distributors?
All M308B8SGP 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 M308B8SGP meets industry standards.
7.What is the process for return or replacement of M308B8SGP?
All M308B8SGP units undergo pre-shipment inspection (PSI). If there is an issue with M308B8SGP, 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 M308B8SGP part is unused and in its original packaging.
Return procedure for M308B8SGP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M308B8SGP Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
