NEC uPD78056Y User Manual
Page 117

117
CHAPTER 5 CPU ARCHITECTURE
IF0L
IF0H
MK0L
MK0H
PR0L
PR0H
Address
Special-Function Register (SFR) Name
Symbol
R/W
After Reset
FFD0H to
FFDFH
FFE0H
Interrupt request flag register 0L
√
√
FFE1H
Interrupt request flag register 0H
√
√
FFE2H
Interrupt request flag register 1L
IF1L
√
√
—
FFE4H
Interrupt mask flag register 0L
√
√
FFE5H
Interrupt mask flag register 0H
√
√
FFE6H
Interrupt mask flag register 1L
MK1L
√
√
—
FFE8H
Priority order specify flag register 0L
√
√
FFE9H
Priority order specify flag register 0H
√
√
FFEAH
Priority order specify flag register 1L
PR1L
√
√
—
FFECH
External interrupt mode register 0
INTM0
—
√
—
FFEDH
External interrupt mode register 1
INTM1
—
√
—
FFF0H
Memory size switching register
IMS
—
√
—
Note2
FFF2H
Oscillation mode selection register
OSMS
W
—
√
—
FFF3H
Pull-up resistor option register H
PUOH
R/W
√
√
—
FFF4H
Internal expansion RAM size
IXS
W
—
√
—
0AH
switching register
(Note3)
FFF6H
Key return mode register
KRM
√
√
—
02H
FFF7H
Pull-up resistor option register L
PUOL
√
√
—
00H
FFF8H
Memory expansion mode register
MM
√
√
—
10H
FFF9H
Watchdog timer mode register
WDTM
√
√
—
00H
FFFAH
Oscillation stabilization time select register
OSTS
—
√
—
FFFBH
Processor clock control register
PCC
√
√
—
Table 5-6. Special-Function Register List (3/3)
Manipulatable Bit Unit
8 bits
1 bit
16 bits
External access area
Note1
√
√
—
Undefined
R/W
IF0
√
00H
MK0
√
FFH
PR0
√
00H
00H
R/W
04H
Notes
1. The external access area cannot be accessed in SFR addressing. Access the area with direct
addressing.
2. The value after reset depends on products.
µ
PD78052, 78052Y: 44H,
µ
PD78053, 78053Y: C6H,
µ
PD78054, 78054Y: C8H,
µ
PD78P054: C8H,
µ
PD78055, 78055Y: CAH,
µ
PD78056, 78056Y: CCH,
µ
PD78058, 78058Y: CFH,
µ
PD78P058,
78P058Y: CFH
3. This register is provided only in the
µ
PD78058, 78058Y, 78P058, and 78P058Y.