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Program timer 1 of 8051 to generate 1 KHz square wave on P2.1 using mode 1. Assume crystal frequency to 12 MHz.
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written 5.4 years ago by
teamques10
★ 64k
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• modified 5.4 years ago |
frequency = 1KHz
1 pulse = 1/1KHz = 1 msec
500 μsec ON time and 500 μsec OFF line.
Crystal Frequency = 12MHz
1 clock pulse = 1μsec.
Count = 500μsec/1μsec = 500
Counter initial value = 65536 - 500 = 65036 = FE0C
TMOD
| Gate | C/T | M1 | M0 | Gate | C/T | M1 | M0 |
|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
IE
| EA | - | - | ES | ET1 | EX1 | ET0 | EX0 |
|---|---|---|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 0 | 00 | 1 | 0 |
PROGRAM :
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