NEC PD754144 User Manual page 55

CHAPTER 3 FEATURES OF ARCHITECTURE AND MEMORY MAP
Hardware name (symbol)
Address
b3 b2
IST1 IST0
FB0H
................................................................................
Program status word (PSW)
................................................................................
Note 1 Note 1
CY SK2
FB2H Interrupt priority selection register (IPS)
FB3H Processor clock control register (PCC)
FB4H INT0 edge detection mode register (IM0)
FB5H Unmounted
FB6H INT2 edge detection mode register (IM2)
FB7H Unmounted
INTA register (INTA)
................................................................................
FB8H
– –
INTB register (INTB)
................................................................................
FB9H
IEEE IRQEE
FBAH Unmounted
FBBH
INTE register (INTE)
................................................................................
FBCH
IET1 IRQT1
INTF register (INTF)
................................................................................
FBDH
IET2 IRQT2
INTG register (INTG)
................................................................................
FBEH
– –
INTH register (INTH)
................................................................................
FBFH
– –
Remarks 1. IE××× is an interrupt enable flag.
2. IRQ××× is an interrupt request flag.
Notes 1. These are not registered as reserved words.
2. Use the CY manipulation instruction to write to CY.
3. IME (bit 3) can only be manipulated by an EI/DI instruction.
4. PCC3 (bit 3) and PCC2 (bit 2) can be manipulated by a STOP/HALT instruction.
5. This register specifies the falling edge of the KRn pin as the set signal of the interrupt request flag
(IRQ2). This register is initialized to 00H after reset. Therefore, write 01H to set the falling edge of
the KRn pin to IRQ2.
Figure 3-7. µ PD754244 I/O Map (4/8)
Number of bits that
can be manipulated
R/W
b1 b0 1-bit
MBE RBE
R/W (R/W)
Note 2
Note 1 Note 1
SK1 SK0
R/W –
R/W –
R/W –
Note 5 R/W –
R/W
IEBT IRQBT
R/W
– –
R/W
IET0 IRQT0
R/W
– –
R/W
IE0 IRQ0
R/W
IE2 IRQ2
User's Manual U10676EJ3V0UM
Bit
manipulation
addressing
4-bit 8-bit
(R/W) (R) fmem.bit R only possible as 8-bit manipulation.
–
–
–
– –
– –
– fmem.bit Bit manipulation can be performed by
reserved word only.
–
– fmem.bit Bit manipulation can be performed by
reserved word only.
–
–
–
Remarks
Note 3
Note 4
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