MM912H634DM1AE

Application Specific Microcontrollers Overview

The MM912H634DM1AE is an integrated microcontroller unit combining a 16-bit HCS12 CPU with a SMARTMOS analog control IC in a single package. It features 64 kB of P-FLASH, 6 kB of RAM, and 4 kB of D-FLASH. The device includes a LIN 2.1 physical layer interface, a 10-bit 15-channel ADC, and two high-side plus two low-side outputs for driving inductive loads. It operates within a temperature range of -40°C to 125°C and supports a maximum bus frequency of 20 MHz.

Application Specific Microcontrollers Feature Summary

• Integrated 16-bit S12 CPU with 64 kB P-FLASH and 6 kB RAM
• SMARTMOS analog die with LIN 2.1 transceiver and current sense module
• Two protected high-side and two protected low-side outputs
• 10-bit ADC with 15 channels and six high-voltage wake-up inputs

Application Specific Microcontrollers Applications

• Relay driver applications
• Motor control systems
• Ignition controllers

Application Specific Microcontrollers Procurement Notes

Verify the specific analog option (A1) required for the application, as it determines the availability of features like the current sense module and second high-side output. Confirm the package type LQFP48-EP matches the design requirements. Check for the R2 suffix if tape and reel packaging is needed instead of the standard tray.

Application Specific Microcontrollers Selection Notes

Select this model over the MM912G634 variant when 64 kB of program memory is required. Ensure the A1 analog option meets the need for a current sense module and six wake-up inputs (L0-L5). Verify that the 20 MHz maximum bus frequency is sufficient for the control loop timing requirements.

Application Specific Microcontrollers Part Context

This component belongs to the MM912_634 family, which integrates an HCS12 microcontroller with a SMARTMOS analog die. The 'H' designation indicates 64 kB of Flash memory, distinguishing it from the 'G' variant with 48 kB. The 'D' suffix denotes the -40°C to 125°C operating temperature range, and 'M1' specifies the LQFP48-EP package with Analog Option A1.

Application Specific Microcontrollers Replacement Considerations

MM912G634DM1AE offers similar functionality but with reduced memory (48 kB Flash, 2 kB RAM, 2 kB Data Flash). MM912H634DV1AE provides the same core features but with a lower operating temperature range (-40°C to 105°C).

Application Specific Microcontrollers FAQ

What is the difference between Analog Options A1 and A2?

Option A1 includes a current sense module, a second high-side output (HS2), and six wake-up inputs (L0-L5). Option A2 lacks the current sense module and has only four wake-up inputs (L0-L3).

How are the digital grounds connected internally?

DGND, LGND, and AGND are internally connected to PGND via back-to-back diodes.

Is reverse battery protection provided on the power supply pins?

Yes, VS1 and VS2 require external reverse battery protection diodes. The VSENSE pin is self-protected against reverse battery connections.