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Interface With MPU
Example of interfacing to an 8-bit MPU(Z80)
Example of interfacing to a 4-bit MPU
If interface data is 4-bits long
If interface data is 8-bits long
Example of interfacing to an 8-bit MPU(Z80)
Example of interface to a 4-bit MPU
Interface to a 4-bit MPU can be made through the I/O port of the 4-bit MPU. If there are sufficient I/O ports,
data can be transferred at 8-bit cycles, however, if there are not, data transfer can be accomplished by two
cycles of 4-bit transfers (select interface as 4-bits long). Please take into account that 2 cycles of the BF check
will be necessary and the timing sequence will prove to be complicated.
http://www.powertipusa.com/mpu.htm
11/10/2004
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