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CHAPTER 3 FEATURES OF ARCHITECTURE AND MEMORY MAP
Hardware name (symbol)
Address
b3
b2
FF0H
Unmounted
to
FF2H
FF3H
Port 3 (PORT3)
FF4H
Unmounted
FF5H
FF6H
Port 6 (PORT6)
Port 7 (PORT7)
................................................................................
FF7H
Note 1
KR7
KR6
Port 8 (PORT8)
................................................................................
FF8H
–
–
FF9H
Unmounted
to
FFFH
Notes 1.
KR4 to KR7 can only be read in 1-bit units. In 4-bit parallel input, PORT7 is used for specification.
2.
These are not registered as reserved words.
Figure 3-7. µ PD754244 I/O Map (8/8)
Number of bits that
can be manipulated
R/W
b1
b0
1-bit
R/W
R/W
R
KR5
KR4
R/W
–
P80
Note 2
User's Manual U10676EJ3V0UM
Bit
manipulation
addressing
4-bit
8-bit
fmem.bit
–
pmem.@L
–
fmem.bit
pmem.@L
–
–
A write to an unmounted area is invalid, and
the read value is undefined.
Remarks
59
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