Question

The following program is used to write data to a printer using the SPP protocol showed below void PutChar (unsigned char c) while ((PTJ & 0x02) !#0 ) ; PTH c PTJ PTJ&0x01; NOP NOP STRB # ACK# BUSY ::: : min.; min. min mi. How many NOP statements must be used to insure the STRB# line is low for the minimum amount of time l n-0.5 μs and the processor takes 3 clock tick s) per instruction with a clock of 20.0 MHz?

Answer 1

clock 20 MH2 +ick Single So, sing le T be tick co llee. a.OS Tuke Clock Jake given is Paocessor heve C.ONKS = 0,15LS Pey insuation. so inSTAuation T = tick Cs) Execution, Pro cesso fo single of time O,15 Take Load Line for the min STRB for time of amount Statemen InsTHuetion NO P So, That Low. wsed 0.S for 3 times