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HW#6_Sol - signal goes LOW it indicates that stable address...

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EE 367 Introduction to Microprocessors (Fall 2011) Solution Set, Homework 6 4.26, The R/W(bar) signal generated by the MPU is part of the control bus. 4.33, [PC]=16; [DAR]=16; [IR]=8; [DR]=8; [Accumulator]=8; [Address Latch/Buffer]=16; [Data Buffer]=8. 5.7, The I/O port is the point where an I/O device connects to its interface circuitry. 6.2, The differences between registers B and D is that B is 8-bit and D is 16-bit. Also, Reg B is the lower byte of Reg D. 6.7, When the 68HC11 is operating in the expanded mode and the AS
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Unformatted text preview: signal goes LOW it indicates that stable address information is present on the address bus. The AS signal is used to latch the low-order byte of the address into an 8-bit data latch. When 68HC11 is operating in the single chip mode this signal becomes an input signal called Strobe A (STRA). This signal can be used as an edge-detecting interrupt input. 6.22, As [X] is decremented [Y] is incremented until [X]=0. Therefore, at the end of the program [X]=0 and [Y]=A4....
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