Datasheet

22.9.3. OCR0 – Output Compare 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. The device is a complex microcontroller with more peripheral units than can be supported
within the 64 location reserved in Opcode for the IN and OUT instructions. For the Extended I/O space
from 0x60 in SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
The Output Compare Register contains an 8-bit value that is continuously compared with the counter
value (TCNT0). A match can be used to generate an Output Compare interrupt, or to generate a
waveform output on the OC0 pin.
Name: OCR0
Offset: 0x23
Reset: 0x00
Property: When addressing I/O Registers as data space the offset address is 0x43
Bit 7 6 5 4 3 2 1 0
OCR0[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 – OCR0[7:0]
Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
230