ML69Q6203LA 参数 Datasheet PDF下载

Preliminary

ML696201 and ML69Q6203

Pin Descriptions (Continued)

Symbol

TDI

TDO

RTCK

External Bus Address and Data

XA [23:1]

XD [15:0]

External Bus Controls Signal

XOE_N

XWE_N

XROMCS_N

XRAMCS_N

XBS1_N

XBS0_N

XIOCS11_N

XIOCS10_N

XIOCS01_N

XIOCS00_N

XWAIT [1:0]

XSYSCLK

O

O

O

O

O

O

O

O

O

O

I

O

External memory access read enable, Active-Low

External memory access write enable, Active-Low

External ROM chip select, Active-Low

External RAM chip select, Active-Low

External memory byte select (MSB), Active-Low

External memory byte select (LSB), Active-Low

I/O bank 1, chip select 1, Active-Low

I/O bank 1, chip select 0, Active-Low

I/O bank 0, chip select 1, Active-Low

I/O bank 0, chip select 0, Active-Low

Wait signal for I/O bank 0/1. A device slower than the register set value can be connected by inputting this signal (wait

when 1).

AHB clock for external bus

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

O

I/O

Address of the bus that connects external RAM, external ROM, external IO and external DRAM

Data bus that connects external RAM, external ROM, external IO and external DRAM

Secondary

Secondary

I/O

I

O

O

Description

This pin is used during debugging. Normally set this input High

This pin is used during debugging. Normally, do not connect this pin to any trace

This pin is used during debugging. Normally, do not connect this pin to any trace

Primary/

Secondary

—

—

—

External Bus Control Signals (DRAM)

XSDCS_N

XCAS_N

XRAS_N

XSDCLK

XSDCKE

XDQM1

XDQM0

DMA Control

DREQ

DREQCLR

TCOUT

General-Purpose I/O Port

PIOA[15:0]

PIOB[15:0]

PIOC[15:0]

PIOD [15:0]

PIOE[15:0]

I/O

I/O

I/O

I/O

I/O

This is a general-purpose port. – Because this port has a secondary function, it cannot be used as a port if its secondary

function is used.

This is a general-purpose port. – Because this port has a secondary function, it cannot be used as a port if its secondary

function is used.

This is a general-purpose port.. – Because this port has a secondary function, it cannot be used as a port if its secondary

function is used.

This is a general-purpose port.. – Because this port has a secondary function, it cannot be used as a port if its secondary

function is used.

This is a general-purpose port.

PIOE[15] is 5-V tolerant.

PIOE[15:12] can be used as IRQ (interrupt requests)

This is a general-purpose port.. – Because this port has a secondary function, it cannot be used as a port if its secondary

function is used.

Primary

Primary

Primary

Primary

Primary

I

O

O

DMA request signal. This signal is used if the DREQ type is set by the DMA controller.

DREQ signal clear request.

The DMA device turns off the DREQ signal when this signal is output.

This signal notifies the DAM device that the last transfer has been started.

Secondary

Secondary

Secondary

O

O

O

O

O

O

O

SDRAM chip select, Active-Low

Column address strobe (SDRAM), Active-Low

Row address strobe (SDRAM), Active-Low

Clock for SDRAM

Clock enable (SDRAM)

Input/output mask (MSB)

Input/output mask (LSB)

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

Secondary

PIOF[6:0]

µPLAT-SIO/UART

I/O

Primary

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