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-rw-r--r--quantum/mcu_selection.mk15
1 files changed, 15 insertions, 0 deletions
diff --git a/quantum/mcu_selection.mk b/quantum/mcu_selection.mk
index ef7e8ae75d..33de162bb1 100644
--- a/quantum/mcu_selection.mk
+++ b/quantum/mcu_selection.mk
@@ -287,3 +287,18 @@ ifneq (,$(filter $(MCU),atmega328p))
NO_UART ?= yes
NO_SUSPEND_POWER_DOWN ?= yes
endif
+
+ifneq (,$(filter $(MCU),attiny85))
+ PROTOCOL = VUSB
+
+ # Processor frequency.
+ # This will define a symbol, F_CPU, in all source code files equal to the
+ # processor frequency in Hz. You can then use this symbol in your source code to
+ # calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+ # automatically to create a 32-bit value in your source code.
+ F_CPU ?= 16500000
+
+ # unsupported features for now
+ NO_UART ?= yes
+ NO_SUSPEND_POWER_DOWN ?= yes
+endif