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.
Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
DDRE3 | DDRE2 | DDRE1 | DDRE0 | ||||
Access | R/W | R/W | R/W | R/W | |||
Reset | 0 | 0 | 0 | 0 |
Port E Data Direction