NEC PD754144 User Manual page 57

CHAPTER 3 FEATURES OF ARCHITECTURE AND MEMORY MAP
Hardware name (symbol)
Address
b3 b2
FD0H Unmounted
to
FD3H
FD4H Programmable threshold port (PTH0)
FD5H Unmounted
Note Note
PTHM3 PTHM2
FD6H
................................................................................
Programmable threshold port mode register (PTHM)
................................................................................
Note Note
PTHM7 PTHM6
FD8H Unmounted
to
FDBH
Note
PO3 –
FDCH
................................................................................
Pull-up resistor specification register group A (POGA)
....................................................................
Note
–
PO6
– –
FDEH
................................................................................
Pull-up resistor specification register group B (POGB)
................................................................................
– –
Note These are not registered as reserved words.
Figure 3-7. µ PD754244 I/O Map (6/8)
Number of bits that
can be manipulated
R/W
b1 b0 1-bit
R
Note Note
PTHM1 PTHM0
R/W –
– –
– –
R/W –
– –
Note
– PO8
R/W –
– –
User's Manual U10676EJ3V0UM
Bit
manipulation
addressing
4-bit 8-bit
– mem.bit
– mem.bit A write to bit 4 or bit 5 is invalid, and the read
value is undefined.
– – A write to an unmounted area is invalid, and
the read value is undefined.
– –
Remarks
57