NEC mPD780852 Series, Preliminary User'S Manual

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CHAPTER 3 CPU ARCHITECTURE
Preliminary User’s Manual U14581EJ3V0UM00
Address Special-Function Register (SFR) Name Symbol R/W
Manipulatable Bit Unit
After Reset
1 Bit 8 Bits 16 Bits
FF80H A/D converter mode register ADM1 R/W — 00H
FF81H Analog input channel specification register ADS1 —
FF82H Power-fail compare mode register PFM —
FF83H Power-fail compare threshold value register PFT —
FF84H Serial operation mode register 3 CSIM3 —
FF85H Asynchronous serial interface mode register ASIM —
FF86H Asynchronous serial interface status register ASIS R — —
FF87H Baud rate generator control register BRGC R/W — —
FF89H D/A converter mode register
Note 1
DAM1 W —
FF94H Sound generator control register SGCR R/W —
FF95H Sound generator buzzer control register SGBR —
FF96H Sound generator amplitude register SGAM —
FF98H Serial operation mode register 2 CSIM2 —
FF99H Serial receive data buffer register SIRB2 — — Undefined
FF9AH Serial receive data buffer status register SRBS2 — — 00H
FFA0H Oscillator mode register
Note 2
OSCM —
FFB0H LCD display mode register LCDM —
FFB2H LCD display control register LCDC —
FFE0H Interrupt request flag register 0L IF0 IF0L
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 specify flag register 0L PR0 PR0L
FFE9H Priority specify flag register 0H PR0H
FFEAH Priority specify flag register 1L PR1L —
FFF0H Memory size switching register IMS — — CFH
Note 3
FFF4H Internal expansion RAM size switching register IXS — — 0CH
Note 4
FFF9H Watchdog timer mode register WDTM — 00H
FFFAH Oscillation stabilization time select register OSTS — — 04H
FFFBH Processor clock control register PCC —
Notes 1. DAM0 is a register that must be set when debugging the
µ
PD780852 with an in-circuit emulator (IE-78K0-
NS). Set this register when emulating a power-fail detection function.
2.
µ
PD780851(A), 780852(A) only
3. The initial value of this register is CFH. Set the following value to this register of each model.
µ
PD780851(A): C8H
µ
PD780852(A): CAH
µ
PD78F0852 (to set the same memory map as
µ
PD780851(A)): C8H
µ
PD78F0852 (to set the same memory map as
µ
PD780852(A)): CAH
4. Although the initial value of this register is 0CH, set this register to 0BH.
Table 3-3. Special-Function Register List (3/3)