ERTEC datasheet(13/51 Pages) RENESAS

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Data Sheet A17989EE2V0DS00

µPD800261

Pin Functions

1.1 List of Pin Functions

Table 1-1:

External Memory Interface Pin Functions

Pin Name

I/O

Function

Alternate Function

A(23:18)

I/ONote

External memory address bus (23:18)

CONFIG(6:1)Note

A(17:15)

I/ONote

External memory address bus (17:15)

BOOT(3:1)Note

A(14:0)

External memory address bus (14:0)

D(31:0)

I/O

External memory data bus (31:0)

WR_N

Write strobe signal

RD_N

Read strobe signal

CLK_SDRAM

Clock to SDRAM

CS_SDRAM_N

Chip select to SDRAM

RAS_SDRAM_N

Row address strobe to SDRAM

CAS_SDRAM_N

Column address strobe to SDRAM

WE_SDRAM_N

RD/WR signal to SDRAM

CS_PER(3:0)_N

Chip select to static memories and peripherals

BE(3:0)_DQM(3:0)_N

Byte enable signal

RDY_PER_N

Ready signal

DTR_N

I/ONote

Direction signal for external driver or scan clock

BOOT0Note

OE_DRIVER_N

Enable signal for external driver or scan clock

Note: The BOOT(3:0) and CONFIG(6:1) pins are used as inputs and read into the BOOT_REG respectively

CONFIG_REG system configuration registers during the active Power On reset phase. After a reset,

these pins are available as normal function pins and used as outputs.

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