NEC PD754144 User Manual page 58

CHAPTER 3 FEATURES OF ARCHITECTURE AND MEMORY MAP
Hardware name (symbol)
Address
b3 b2
FE0H Unmounted
to
FE7H
PM33 PM32
FE8H
................................................................................
Port mode register group A (PMGA)
................................................................................
Note Note
PM63 PM62
FEAH Unmounted
to
FEDH
– –
FEEH
................................................................................
Port mode register group C (PMGC)
................................................................................
– –
Note These are not registered as reserved words.
However, bit manipulation is possible by using 0FE9.0 to 0FE9.3.
58
Figure 3-7. µ PD754244 I/O Map (7/8)
Number of bits that
can be manipulated
R/W
b1 b0 1-bit
PM31 PM30
R/W
Note Note
PM61 PM60
Note
– PM8
R/W –
– –
User's Manual U10676EJ3V0UM
Bit
manipulation
addressing
4-bit 8-bit
– –
– – A write to an unmounted area is invalid, and
the read value is undefined.
Remarks