ATmega128A
5. Register Summary (Continued)
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Page
$02 ($22)
$01 ($21)
$00 ($20)
DDRE
PINE
PINF
DDE7
PINE7
PINF7
DDE6
PINE6
PINF6
DDE5
PINE5
PINF5
DDE4
PINE4
PINF4
DDE3
PINE3
PINF3
DDE2
PINE2
PINF2
DDE1
PINE1
PINF1
DDE0
PINE0
PINF0
88
88
89
Notes: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
should never be written.
2. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI instructions will operate on
all bits in the I/O register, writing a one back into any flag read as set, thus clearing the flag. The CBI and SBI instructions
work with registers $00 to $1F only.
19
8151GS–AVR–07/10
ATMEL [ ATMEL ]
