Datasheet

20.5.1 SFIOR – Special Function IO Register

Name: SFIOR

Offset: 0x30 [ID-00000142]

Reset: 0

Property: When addressing I/O Registers as data space the offset address is 0x50

When using the I/O specific commands IN and OUT, the I/O addresses 0x00 - 0x3F must be used. When

addressing I/O Registers as data space using LD and ST instructions, 0x20 must be added to these offset

addresses.

Bit 7 6 5 4 3 2 1 0

PSR10

Access

R/W

Reset 0

Bit 0 – PSR10 Prescaler Reset Timer/Counter1 and Timer/Counter0

When this bit is written to one, the Timer/Counter1 and Timer/Counter0 prescaler will be reset. The bit will

be cleared by hardware after the operation is performed. Writing a zero to this bit will have no effect. Note

that Timer/Counter1 and Timer/Counter0 share the same prescaler and a reset of this prescaler will affect

both timers. This bit will always be read as zero.

AVR 8-Bit Microcontroller

Timer/Counter0 and Timer/Counter1 Prescalers

Datasheet Complete

40001974A-page 113