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Chapter 14: Specifications and Characteristics
Emulator Specifications and Characteristics
Address and Function Codes One 74FCT245A load per bit plus 50 pf
capacitance.
Clocks One 74ACT load per bit plus 20 pf capacitance.
Chip Selects One 74FCT244A load per bit plus 50 pf capacitance.
Interrupts One F load per bit plus a 3.3K pullup and 50 pf capacitance.
Other Signals /FRZ, /AVEC, BUSW are 74ALS inputs plus 50 pf capacitance.
/DTACK, /BR, /BG, /BGACK have a 5 ns pal path to the processor.
/UDS, /LDS, /AS, R/W have a 5 ns pal path to the processor plus a 3.3K pullup and
50 pf capacitance.
Bus Error is either connected to the target system unbuffered or totally
disconnected from the target.
The emulator specifications for "worst case" and "typical" are a function of loading
in the target system. Actual performance may be worse than "worst case" if the
loading is above Motorola specifications for the processor.
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