Datasheet

22.11.7 SFIOR – Special Function IO Register

Name: SFIOR

Offset: 0x30 [ID-00000d14]

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

PSR2

Access

R/W

Reset 0

Bit 1 – PSR2 Prescaler Reset Timer/Counter2

When this bit is written to one, the Timer/Counter2 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. This bit will always

be read as zero if Timer/Counter2 is clocked by the internal CPU clock. If this bit is written when Timer/

Counter2 is operating in Asynchronous mode, the bit will remain one until the prescaler has been reset.

AVR 8-Bit Microcontroller

8-bit Timer/Counter2 with PWM and Asynchronous Ope...

Datasheet Complete

40001974A-page 172