NEC uPD78P078 - Manual (Page 117)

117
CHAPTER 5 CPU ARCHITECTURE
Address Special Function Register (SFR) Name Symbol R/W After Reset
FF74H Transmit shift register TXS SIO2 W —
√
— FFH
Receive buffer register RXB R
FF80H A/D converter mode register ADM R/W
√ √
— 01H
FF84H A/D converter input select register ADIS —
√
— 00H
FF8AH Correction control register CORCN
√ √
—
FF90H D/A conversion value set register 0 DACS0 —
√
—
FF91H D/A conversion value set register 1 DACS1 — √ —
FF98H D/A converter mode registe DAM √ √ —
FFD0H to External access area Note 1
√ √
— Undefined
FFDFH
FFE0H Interrupt request flag register 0L IF0 IF0L
√ √ √
00H
FFE1H Interrupt request flag register 0H IF0H
√ √
FFE2H Interrupt request flag register 1L IF1L √ √ —
FFE4H Interrupt mask flag register 0L MK0 MK0L √ √ √ FFH
FFE5H Interrupt mask flag register 0H MK0H √ √
FFE6H Interrupt mask flag register 1L MK1L
√ √
—
FFE8H Priority order specify flag register 0L PR0 PR0L
√ √ √
FFE9H Priority order specify flag register 0H PR0H
√ √
FFEAH Priority order specify flag register 1L PR1L
√ √
—
FFECH External interrupt mode register 0 INTM0 —
√
— 00H
FFEDH External interrupt mode register 1 INTM1 — √ —
FFF0H Internal 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 Note 3
switching register
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)
8 bits 1 bit 16 bits
Notes 1. The external access area cannot be accessed in SFR addressing. Access the area through direct
addressing.
2. The value after reset depends on products.
µ
PD78076,78076Y: CCH,
µ
PD78078, 78078Y: CFH,
µ
PD78P078, 78P078Y: CFH
When a mask ROM version is used, do not set to IMS any value other than that determined at reset,
unless external device expansion function is used with the
µ
PD78078 or 78078Y.
3. When a mask ROM version is used, do not set to IXS any value other than that determined at reset.
Manipulation