NEC mPD780065 Series Preliminary User's Manual page 57

Address Special-Function Register (SFR) Name
FFB0H Serial operation mode register 30
FFB1H Serial operation mode register 31
FFD0H External access area
↓
FFDFH
FFE0H Interrupt request flag register 0L
FFE1H Interrupt request flag register 0H
FFE2H Interrupt request flag register 1L
FFE4H Interrupt mask flag register 0L
FFE5H Interrupt mask flag register 0H
FFE6H Interrupt mask flag register 1L
FFE8H Priority level specification flag register 0L
FFE9H Priority level specification flag register 0H
FFEAH Priority level specification flag register 1L
FFF0H Memory size switching register
FFF4H Internal expansion RAM size switching
register
FFF8H Memory expansion wait setting register
FFF9H Watchdog timer mode register
FFFAH Oscillation stabilization time selection register OSTS
FFFBH Processor clock control register
Notes 1. The external access area cannot be accessed by SFR addressing. Access it with the direct addressing
method.
2. The default is CFH, but be sure to set the value corresponding to each respective product as indicated
below.
µ PD780065: CAH
µ PD78F0066: CCH or value for mask ROM version
3. The default is 0CH, but always set 04H.
CHAPTER 3 CPU ARCHITECTURE
Table 3-3. Special-Function Register List (3/3)
Symbol
CSIM30
CSIM31
Note 1
IF0
IF1L
MK0 MK0L
MK1L
PR0 PR0L
PR1L
IMS
IXS
MM
WDTM
PCC
Preliminary User's Manual U13420EJ2V0UM00
Manipulatable Bit Unit
R/W
1 bit
√
R/W
√
√
√
IF0L
√
IF0H
√
√
√
MK0H
√
√
√
PR0H
√
—
√
√
√
—
√
After Reset
8 bits 16 bits
√
— 00H
√
—
√
— Undefined
√ √
00H
√
√
—
√ √
FFH
√
√
—
√ √
√
√
—
√
Note 2
— CFH
√
Note 3
— 0CH
√
— 10H
√
— 00H
√
— 04H
√
—
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