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