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CHAPTER 5 CPU ARCHITECTURE
IF0L
IF0H
MK0L
MK0H
PR0L
PR0H
Address Special-Function Register (SFR) Name Symbol R/W After Reset
FFD0H to External access area
Note 1
R/W
√√—
Undefined
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 — √ —
Note 2
FFF2H Oscillation mode selection register OSMS W — √ — 00H
FFF3H Pull-up resistor option register H PUOH R/W √√—
FFF4H Internal expansion RAM size IXS W
— √ —
0AH
switching register
Note 3
FFF6H Key return mode register KRM R/W √√— 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 — √ — 04H
FFFBH Processor clock control register PCC √√—
Table 5-3. Special-Function Register List (3/3)
Manipulatable Bit Unit
8 bits
1 bit
16 bits
MK0
√
PR0
√
00H
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
PD78056F, 78056FY: CCH,
µ
PD78058F, 78058FY: CFH,
µ
PD78P058F, 78P058FY: CFH
3. This register is provided only in the
µ
PD78058F, 78058FY, 78P058F, and 78P058FY.
FFH
IF0
√
00H