Datasheet

15.9.5. TC0 Counter Value Register
When addressing I/O Registers as data space using LD and ST instructions, the provided offset must be
used. When using the I/O specific commands IN and OUT, the offset is reduced by 0x20, resulting in an
I/O address offset within 0x00 - 0x3F.
Name: TCNT0
Offset: 0x46
Reset: 0x00
Property: When addressing as I/O Register: address offset is 0x26
Bit 7 6 5 4 3 2 1 0
TCNT0[7:0]
Access
R/W R/W R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0 0 0
Bits 7:0 – TCNT0[7:0]: TC0 Counter Value
The Timer/Counter Register gives direct access, both for read and write operations, to the Timer/Counter
unit 8-bit counter. Writing to the TCNT0 Register blocks (removes) the Compare Match on the following
timer clock. Modifying the counter (TCNT0) while the counter is running, introduces a risk of missing a
Compare Match between TCNT0 and the OCR0x Registers.
Atmel ATmega16M1/32M1/64M1 [DATASHEET]
Atmel-8209F-ATmega16M1/32M1/64M1_Datasheet_Complete-10/2016
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