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
Reset:
0
Access:
When addressing I/O Registers as data space the offset address is 0x50
Bit76543210
PSR10
AccessR/W
Reset0

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

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.