---
title: kIOMaxBusStall40usec
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [driverkit 20.0+, macOS 11.0+]
path: kernel/3689532-anonymous/kiomaxbusstall40usec
---

# kIOMaxBusStall40usec

## Declaration

```occ
kIOMaxBusStall40usec = 40000
```