SH7670 datasheet(42/1292 Pages) RENESAS

42 / 1292 page

Section 1 Overview

Rev. 1.00 Nov. 14, 2007 Page 16 of 1262

REJ09B0437-0100

Classification Symbol

I/O Name

Function

DQMUL

Second byte

select

Selects data bus bits 23 to 16 of

SDRAM.

DQMLU

Third byte select

Selects data bus bits 15 to 8 of

SDRAM.

DQMLL

Least significant

byte select

Selects data bus bits 7 to 0 of

SDRAM.

CE1A

PCMCIA card

select (lower)

Chip enable signal pin for PCMCIA

connected to area 5

CE1B

PCMCIA card

select (lower)

Chip enable signal pin for PCMCIA

connected to area 6

CE2A

PCMCIA card

select (upper)

Chip enable signal pin for PCMCIA

connected to area 5

CE2B

PCMCIA card

select (upper)

Chip enable signal pin for PCMCIA

connected to area 6

ICIOWR

PCMCIA I/O write

strobe

Pin connected to the PCMCIA I/O

write strobe

ICIORD

PCMCIA I/O read

strobe

Pin connected to the PCMCIA I/O

read strobe

PCMCIA memory

write strobe

Pin connected to the PCMCIA

memory write strobe

Bus control

IOIS16

PCMCIA dynamic

bus sizing

Indicates the 16-bit I/O of PCMCIA in

little-endian mode. Fix this pin low in

big-endian mode.

DREQ0, DREQ1

DMA-transfer

request

Input pins to receive external requests

for DMA transfer

DACK0, DACK1

DMA-transfer

request

acknowledge

Output pins for signals indicating

acknowledge of external requests

from external devices

Direct memory

access

controller

(DMAC)

TEND0, TEND1

DMA-transfer end

output

Output pins for DMA transfer end

CRS

Carrier sense

Carrier sensing pin

COL

Collision

Collision detecting pin

MII_TXD3 to

MII_TXD0

Transmit data

4-bit transmit data pins

Ethernet

controller

(EtherC)

TX_EN

Transmit enable

Indicates that transmit data is ready

on the MII_TXD3 to MII_TXD0 pins.

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