H8SX1663 datasheet(226/1158 Pages) RENESAS

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Section 6 Bus Controller (BSC)

Rev.1.00 Jun. 07, 2006 Page 174 of 1102

REJ09B0294-0100

Name

Symbol

I/O

Function

Chip select 0

CS0

Output

Strobe signal indicating that area 0 is selected

Chip select 1

CS1

Output

Strobe signal indicating that area 1 is selected

Chip select 2

CS2

Output

Strobe signal indicating that area 2 is selected

Chip select 3

CS3

Output

Strobe signal indicating that area 3 is selected

Chip select 4

CS4

Output

Strobe signal indicating that area 4 is selected

Chip select 5

CS5

Output

Strobe signal indicating that area 5 is selected

Chip select 6

CS6

Output

Strobe signal indicating that area 6 is selected

Chip select 7

CS7

Output

Strobe signal indicating that area 7 is selected

Row address strobe

RAS

Output

•

Row address strobe signal when area 2 is

specified as DRAM space

•

Row address strobe signal when area 2 is

specified as SDRAM space

Column address strobe

CAS

Output

Column address strobe signal when area 2 is

specified as SDRAM space

Write enable

Output

•

Write enable signal for DRAM

•

Write enable signal when area 2 is specified as

SDRAM space

Lower-upper-column address

strobe/lower-upper-data mask

enable

LUCAS/

DQMLU

Output

•

Lower-upper-column address strobe signal for 32-

bit DRAM

•

Upper-column address strobe signal for 16-bit

DRAM

•

Lower-upper-data mask enable signal for 32-bit

SDRAM

•

Upper-data mask enable signal for 16-bit SDRAM

Lower-lower-column address

strobe/lower-lower-data mask

enable

LLCAS/

DQMLL

Output

•

Lower-lower-column address strobe signal for 32-

bit DRAM

•

Lower-column address strobe signal for 16-bit

DRAM

•

Column address strobe signal for 8-bit DRAM

•

Lower-lower-data mask enable signal for 32-bit

SDRAM

•

Lower-data mask enable signal for 16-bit SDRAM

•

Data mask enable signal for 8-bit SDRAM

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