4.6 ACSRB – Analog Comparator Control and Status Register

Name: ACSRB
Offset: 0x4F
Reset: 0x00
Property: When addressing as I/O Register: address offset is 0x2F

The Store Program Memory Control and Status Register contains the control bits needed to control the Boot Loader operations. When addressing I/O Registers as data space using LD and ST instructions, the provided offset must be used. When using the I/O specific commands IN and OUT, the offset is reduced by 0x20, resulting in an I/O address offset within 0x00 - 0x3F.

Bit 76543210 
        ACOE 
Access R/W 
Reset 0 

Bit 0 – ACOE Analog Comparator Output Enable

Setting this bit makes the output of AC available on PE0. If this bit is not set, PE0 can be used as general I/O pin.