UPD784021 datasheet(28/92 Pages) RENESAS

28 / 92 page

mPD784020, 784021

AddressNote 1

Special function register (SFR) name

Abbreviation

R/W

Manipulatable bits

When reset

1 bit

8 bits 16 bits

0FF84H

Synchronous serial interface mode register 1

CSIM1

R/W

–

00H

0FF85H

Synchronous serial interface mode register 2

CSIM2

–

0FF86H

Serial shift register

SIO

–

0FF88H

Asynchronous serial interface mode register

ASIM

–

0FF89H

Asynchronous serial interface mode register 2

ASIM2

–

0FF8AH

Asynchronous serial interface status register

ASIS

–

0FF8BH

Asynchronous serial interface status register 2

ASIS2

–

0FF8CH

Serial receive buffer: UART0

RXB

–

Undefined

Serial transmission shift register: UART0

TXS

–

Serial shift register: IOE1

SIO1

R/W

–

0FF8DH

Serial receive buffer: UART2

RXB2

–

Serial transmission shift register: UART2

TXS2

–

Serial shift register: IOE2

SIO2

R/W

–

0FF90H

Baud rate generator control register

BRGC

–

00H

0FF91H

Baud rate generator control register 2

BRGC2

–

0FFA0H

External interrupt mode register 0

INTM0

–

0FFA1H

External interrupt mode register 1

INTM1

–

0FFA4H

Sampling clock selection register

SCS0

–

0FFA8H

In-service priority register

ISPR

–

0FFAAH

Interrupt mode control register

IMC

R/W

–

80H

0FFACH

Interrupt mask register 0L

MK0L MK0

FFFFH

0FFADH

Interrupt mask register 0H

MK0H

0FFAEH

Interrupt mask register 1L

MK1L

–

FFH

0FFC0H

Standby control register

STBC

–

lNote 2

–

30H

0FFC2H

Watchdog timer mode register

WDM

–

lNote 2

–

00H

0FFC4H

Memory expansion mode register

–

20H

0FFC5H

Hold mode register

HLDM

–

00H

0FFC6H

Clock output mode register

CLOM

–

0FFC7H

Programmable wait control register 1

PWC1

–

AAH

0FFC8H

Programmable wait control register 2

PWC2

–

AAAAH

Table 7-1 Special Function Registers (SFRs) (3/4)

Notes 1. Applicable when the LOCATION 0 instruction is executed. When the LOCATION 0FH instruction is

executed, F0000H is added to each address.

2. A write operation can be performed only with special instructions MOV STBC,#byte and MOV

WDM,#byte. Other instructions cannot perform a write operation.

UPD784021 Datasheet(PDF) 28 Page - Renesas Technology Corp

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