Before dissecting version 2.2.3.593, it’s crucial to understand the distinction between a driver and firmware.
Broadcom (now owned by Cypress Semiconductor, then Infineon) produces some of the most common Bluetooth radio chips on the market, including the BCM2070, BCM43142, BCM94352, and BCM20702 series. These chips often appear in Dell, HP, Lenovo, and Acer laptops.
The firmware version 2.2.3.593 is a specific patch for Broadcom’s RAM-USB and UART Bluetooth devices, primarily distributed through Windows Update’s driver catalog or OEM support sites.
Broadcom’s “Bluetooth Low Energy (BLE) duty cycling” was recalibrated. In prior versions, the chip entered deep sleep too aggressively, causing connection drops with BLE mice and heart rate monitors. Version 2.2.3.593 introduces a dynamic connection supervision timer:
| Device Class | Pre-update reconnect latency | Post-update reconnect latency | |--------------|-----------------------------|-------------------------------| | BLE Mouse | 380 – 1200 ms | 180 – 340 ms | | BLE Keyboard | 450 – 1500 ms | 200 – 400 ms | | A2DP Headset | 220 ms | 210 ms (no regression) |
Idle power consumption (BCM20702 test): Increased by 0.8 mW under Windows 10 due to more frequent polling for security state checks.
Unlike major operating system updates that add flashy features, firmware version 2.2.3.593 focuses on stability, latency reduction, and compatibility. Based on release notes from various OEMs (Dell, HP) and community analysis, this update addresses the following:
Given that Broadcom has transitioned most Bluetooth firmware to Cypress/Infineon, version 2.2.3.593 remains a last-mile security patch for legacy BCM2070x silicon. No further functional updates are expected. Enterprises should plan hardware migration to Bluetooth 5.x chips (Intel AX200, Realtek 8822CE) by 2026 to maintain security compliance.
Following the update, users reported intermittent cursor freezes lasting 2–5 seconds on Windows 10 (v1709). Investigation revealed that the firmware’s new authentication frame check erroneously discarded valid encrypted HID report packets with slightly malformed MIC (Message Integrity Check). Broadcom issued a hotfix (2.2.3.600) for OEMs, but version 2.2.3.593 remains in the standard update channel.
Even a successful update to version 2.2.3.593 can cause side effects. Here is what to do if things go wrong.