SH7672 datasheet(401/1292 Pages) RENESAS

401 / 1292 page

Section 11 Power-Down Modes

Rev. 1.00 Nov. 14, 2007 Page 375 of 1262

REJ09B0437-0100

Section 11 Power-Down Modes

In power-down modes, operation of some of the internal peripheral modules and of the CPU stops.

This leads to reduced power consumption. These modes are canceled by a reset or interrupt.

11.1

Features

11.1.1

Power-Down Modes

This LSI has the following power-down modes and function:

1. Sleep mode

2. Software standby mode

3. Module standby function

Table 11.1 shows the transition conditions for entering the modes from the program execution

state, as well as the CPU and peripheral module states in each mode and the procedures for

canceling each mode.

Table 11.1

States of Power-Down Modes

State*

Power-Down

Mode

Transition Conditions

CPG

CPU

On-Chip

Memory

On-Chip

Peripheral

Modules

External

Memory

Canceling

Procedure

Sleep mode

Execute SLEEP

instruction with STBY bit

cleared to 0 in STBCR

Runs

Halts

Held

Runs

Auto-

refreshing

•

Interrupt

•

Reset

•

DMA address

error

Software

standby mode

Execute SLEEP

instruction with STBY bit

set to 1 in STBCR

Halts

Held

Halts

(contents are

held)

Halts

Self-

refreshing

•

NMI interrupt

•

IRQ interrupt

•

Reset

Module standby

function

Set the MSTP bits in

STBCR2, STBCR3, and

STBCR4 to 1

Runs

Held

Specified

module halts

(contents are

held)

Specified

module halts

Auto-

refreshing

•

Clear MSTP bit

to 0

•

Reset

Note:

The pin state is retained or set to high impedance. For details, see appendix A, Pin

States.

SH7672 Datasheet(PDF) 401 Page - Renesas Technology Corp

SH7672 Datasheet(HTML) 401 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL