🛠️ What is the Motbsidcom Driver? (And Why is it on My PC?)
If you've ever dug through your Windows driver stack or encountered a system error mentioning motbsidcom.sys, you might be wondering what this oddly named file does.
The Short Answer:motbsidcom stands for Motorola Bus Sideband Communication. It is a kernel-mode driver used to help your computer communicate with Motorola mobile phones and modems. What does it do?
Bridge Communication: It acts as the translator between your Windows operating system and the hardware inside a Motorola device.
USB Connectivity: It is frequently used for managing USB modem functions or "sideband" data transfers that happen alongside standard charging or file syncing. motbsidcom driver
System Stability: As a kernel-mode driver, it runs at a high privilege level to ensure that data flows smoothly between the phone and the PC without interruption.
Common Issues:Most users only notice this driver if it becomes outdated or corrupted, which can lead to:
Device Not Recognized: Your Motorola phone won't connect to the PC.
BSOD (Blue Screen of Death): If the .sys file is damaged, it can cause system crashes. 🛠️ What is the Motbsidcom Driver
How to Fix It:If you're having trouble, the best step is to visit the Motorola Support site to download the latest Motorola Device Manager, which includes all necessary USB and communication drivers like motbsidcom.
Are you seeing a specific error message or code related to this driver, or are you just curious about its purpose? What is a Driver? - Windows drivers | Microsoft Learn
A driver is a software component that lets the operating system and a device communicate. Microsoft Learn Motbsidcom Driver -
This driver interfaces with onboard SCC (Serial Communication Controllers) or SMC (Serial Management Controllers) inside Motorola communication processors.
Examples: MPC860 (PowerQUICC)
MPC8260
ColdFire MCF52xx
Cause: Windows Driver Signature Enforcement is active.
Fix: Reboot and disable Driver Signature Enforcement as shown in Step 1 above. For a permanent solution (riskier), you can use the command line: bcdedit /set testsigning on (reboot to enable test mode).
imx-uart or fsl-lpuart.If Device Manager shows "motbsidcom" with a yellow exclamation:
Cause: Windows Update may have overwritten the driver with a generic Microsoft driver. Fix: Roll back the driver in Device Manager > Properties > Driver > Roll Back Driver. Reinstall the Motorola driver manually.
dmesg | grep -i motbsidcom
In VxWorks (common for this driver):
/* Include in sysLib.c or startup script */
ld < motbsidcom.o
usrRootInit()
Unlike standard UART drivers, motbsidcom may support block transfers – sending/receiving fixed-size frames (e.g., 256 bytes) with less CPU overhead.
Control via ioctl:
#include <linux/motbsidcom.h> // Vendor header
int block_size = 512;
ioctl(fd, MOTBSIDCOM_SET_BLKSZ, &block_size);