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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- Spring '10
- Microprocessor, address bus, Input/output, 8-bit data latch