topic Re: Hi, in T-Series

Hi,

rahulsoni — Thu, 05 Feb 2015 09:34:42 GMT

Hi,

I am trying to interface T4240 freescale processor with S29GL01GS11TFIV1 NOR flash. Can you tell me which Latch i should use. Also provide the connections for interfacing.

Thank You.

Re: Hi,

Bulat — Fri, 06 Feb 2015 10:11:40 GMT

You can use any Latch that supports 1.8V power supply. FPGA or PLD can also be used.

Basic connections between the NOR flash and T4240 are as following:

Flash - Processor

--------------------------------

data

DQ0 - IFC_AD15

DQ1 - IFC_AD14

DQ2 - IFC_AD13

...

DQ15 - IFC_AD0

address

A0 - IFC_A30

A1 - IFC_A29

...

A4 - IFC_A26

A5 - latched IFC_AD25

A6 - latched IFC_AD24

A7 - latched IFC_AD23

...

A25 - latched IFC_AD5

control

CE - IFC_CS0

OE - IFC_OE

WE - IFC_WE0

Re: Hi,

rahulsoni — Mon, 09 Feb 2015 04:26:56 GMT

Hi, thank you. I am unable to find A0 - A25. I am beginner in this field. Can you please help.

Re: Hi,

Bulat — Mon, 09 Feb 2015 06:28:30 GMT

Left column lists signals of the NOR flash, including A0 - A25. Take a look at U2 device in your schematics, you will easily find these signals.

Re: Hi,

rahulsoni — Mon, 09 Feb 2015 06:42:45 GMT

Thank you Bulat Karymov, but i wanted to know how to connect AD[0:26] to D Latch when i have only 16 input pins in the latch. I mean either i must have 26 pins in D Latch or some pins of processor must be " No Connect". If i have to connect latched AD5 to AD25, then still i need 21 pins in my latch, which is not available.

Re: Hi,

Bulat — Mon, 09 Feb 2015 12:36:18 GMT

In your figure the latch is 16-bit one. Since you need to latch 21 address signals, you need to add one latch device more. You can probably arrange three 8-bit latch devices. Without extending address latch, you will not be able to address 128MByte Flash memory.

Re: Hi,

rahulsoni — Tue, 10 Feb 2015 09:21:51 GMT

Thank you.