MEC1521H-B0-I/2MW

Application Specific Microcontrollers Overview

The MEC1521H-B0-I/2MW is an ARM Cortex-M4 embedded controller designed for notebook PC applications. It operates at 3.3 V and 1.8 V with a temperature range of -40°C to 85°C. The device features a 48 MHz processor, 256 KB SRAM (224 KB code, 32 KB data), and 64 bytes of battery-backed storage. Key interfaces include Intel eSPI compliant host communication, SPI master/slave controllers, five I2C/SMBus controllers, three UARTs, and PS/2 support. Security is provided by hardware accelerators for AES-256, ECDSA, SHA-384, and RSA, along with a secure boot loader.

Application Specific Microcontrollers Feature Summary

• ARM Cortex-M4 processor running up to 48 MHz with nested vectored interrupt controller
• Intel eSPI host interface supporting Master and Slave Attached Flash Sharing
• Hardware security accelerators including AES-256, ECDSA, SHA-384, and True Random Number Generator
• Comprehensive peripheral set including 5 I2C/SMBus controllers, 3 UARTs, and 9 PWM outputs

Application Specific Microcontrollers Applications

• Notebook PC embedded controllers
• Systems requiring ACPI power state management (S0-S5)
• Secure boot and firmware authentication platforms
• Low-power IoT or edge computing devices requiring RTC and hibernation timers

Application Specific Microcontrollers Procurement Notes

Verify the specific package variant against the datasheet Table 1-1, as the MEC1521 family includes 144-pin WFBGA, 128-pin VTQFP/WFBGA, and 82-pin WFBGA options. Confirm that the required peripherals, such as the 8042 keyboard controller or internal EEPROM, match the capabilities of the MEC1521 variant, as these are not present in all package types. Ensure the design supports the dual power plane requirement of VBAT and VTR.

Application Specific Microcontrollers Selection Notes

Select this component when an Intel eSPI interface is required for host communication. Choose the MEC1521H-B0-I/2MW over other MEC152x variants if the application does not require the internal SPI flash found in the MEC1527 series or the EEPROM in the MEC1523 series. Verify GPIO count requirements, as the 144-pin package offers 128 GPIOs while smaller packages offer fewer. Ensure the system design can accommodate the 1.8V eSPI signaling levels.

Application Specific Microcontrollers Part Context

This part belongs to the MEC152x family of low-power integrated embedded controllers from Microchip Technology. The family shares a common ARM Cortex-M4 core and peripheral architecture but varies in package size, GPIO count, and specific memory configurations like internal flash or EEPROM presence. The MEC1521 is positioned as a versatile controller for standard notebook architectures.

Application Specific Microcontrollers Replacement Considerations

Direct replacements within the MEC152x family include MEC1521H-B0-I/SZ (144-pin WFBGA) or MEC1521H-B0-I/Z2 (128-pin WFBGA). These parts share identical core specifications and memory maps but differ in physical footprint and pinout. Cross-family replacement with MEC1523 or MEC1527 requires verification of additional peripherals like EEPROM or internal flash which may not be needed or compatible with the existing board layout.

Application Specific Microcontrollers FAQ

Does the MEC1521H-B0-I/2MW contain internal SPI Flash?

No, the MEC1521 variant does not include internal SPI Flash. This feature is exclusive to the MEC1527 sub-family within the MEC152x line.

What is the maximum operating frequency of the processor?

The ARM Cortex-M4 processor supports a programmable clock frequency up to 48 MHz.

Is the device compatible with legacy 3.3V platforms?

Yes, the MEC152x has two banks of I/O pins configurable for either 1.8V or 3.3V operation, allowing integration into legacy platforms requiring 3.3V signals.