Basically what I need to do is to connect the data bus of MC68HC11F1 (8-bit port) to 74HC574 which is an octal D-type edge-triggered flip-flops with 3-state output.
The purpose of the flip-flops is to receive digital output from the microcontroller and pass it to an external device.
My question is, where should the "clock" pin of the flip-flops (74HC574) be connected to?
Note:
MC68HC11F1 is supposed to function in expanded mode. So the data bus is on port C.
Here are the datasheets:
74HC574
http://www.datasheetcatalog.com/datasheets_pdf/7/4/H/C/74HC574.shtml
MC68HC11F1
http://www.datasheetcatalog.com/datasheets_pdf/M/C/6/8/MC68HC11F1.shtml
On an unrelated question, how to ghost the static RAM located from $2000 to $3FFF in the microcontroller to a range from $6000 to $7FFF?
Thanks a ton for any info you posted.
The purpose of the flip-flops is to receive digital output from the microcontroller and pass it to an external device.
My question is, where should the "clock" pin of the flip-flops (74HC574) be connected to?
Note:
MC68HC11F1 is supposed to function in expanded mode. So the data bus is on port C.
Here are the datasheets:
74HC574
http://www.datasheetcatalog.com/datasheets_pdf/7/4/H/C/74HC574.shtml
MC68HC11F1
http://www.datasheetcatalog.com/datasheets_pdf/M/C/6/8/MC68HC11F1.shtml
On an unrelated question, how to ghost the static RAM located from $2000 to $3FFF in the microcontroller to a range from $6000 to $7FFF?
Thanks a ton for any info you posted.
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