SFIOR – Special Function IO Register

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.

Name:
SFIOR
Offset:
0x30 [ID-00000d14]
Reset:
0
Access:
When addressing I/O Registers as data space the offset address is 0x50
Bit76543210
PSR2
AccessR/W
Reset0

Bit 1 – PSR2: Prescaler Reset Timer/Counter2

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.