SH7201 datasheet(42/1196 Pages) RENESAS

42 / 1196 page

Section 1 Overview

Rev. 2.00 Sep. 07, 2007 Page 14 of 1164

REJ09B0321-0200

Classification

Symbol

I/O

Name

Function

Bus control

BC0

Byte select

Selects bits 7 to 0 of data of external

memory or device. (For an access in

units of 8, 16, or 32 bits)

BC1

Byte select

Selects bits 15 to 8 of data of

external memory or device. (For an

access in units of 16 or 32 bits)

BC2

Byte select

Selects bits 23 to 16 of data of

external memory or device. (For an

access in units of 32 bits)

BC3

Byte select

Selects bits 31 to 24 of data of

external memory or device. (For an

access in units of 32 bits)

DQM0

Byte select

Selects bits D7 to D0 when SDRAM

is connected. (For an access in units

of 8, 16, or 32 bits)

DQM1

Byte select

Selects bits D15 to D8 when SDRAM

is connected. (For an access in units

of 16 or 32 bits)

DQM2

Byte select

Selects bits D23 to D16 when

SDRAM is connected. (For an

access in units of 32 bits)

DQM3

Byte select

Selects bits D31 to D24 when

SDRAM is connected. (For an

access in units of 32 bits)

SDCS1,

SDCS0

Chip select

Pins connected to the

CS pins of

SDRAM

SDRAS

RAS

Pin connected to the

RAS pin of

SDRAM

SDCAS

CAS

Pin connected to the

CAS pin of

SDRAM

SDWE

Pin connected to the

WE pin of

SDRAM

SDCKE

CK enable

Pin connected to the CKE pin of

SDRAM

SDCLK

Clock output

Pin connected to the CLK pin of

SDRAM

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