HD6433713 datasheet(301/324 Pages) RENESAS

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SYSCR1—System Control Register 1

H'F0

System Control

SYSCR2—System Control Register 2

H'F1

System Control

Bit

Initial value

Read/Write

SSBY

R/W

STS2

R/W

STS1

R/W

STS0

R/W

LSON

R/W

—

R/W

—

Standby Timer Select

Wait time = 8192 states

Wait time = 16384 states

Wait time = 32768 states

Wait time = 65536 states

Wait time = 131072 states

Low-Speed On Flag

CPU runs on system clock ( )

CPU runs on subclock (

)

SUB

Standby

Sleep mode entered after SLEEP instruction is executed.

Standby mode entered after SLEEP instruction is executed.

*3 *3

Notes: 1. Write is enabled in active mode only.

2. This relates to the transitions between operation modes, so functioning depends on the

combination of this bit with other control bits and interrupts. For details see 3.3, System

Modes.

3. Don’t care.

Bit

Initial value

Read/Write

—

DTON

—

R/W

—

R/W

Direct Transfer On Flag

In subactive mode, watch mode is entered when a SLEEP

instruction is executed.

1 In subactive mode, if LSON bit = 0, active mode is entered

via watch mode when a SLEEP instruction is executed.

Note: * Write is enabled in subactive mode only.

290

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