May 2024
Intermediate to advanced
534 pages
17h 58m
English
book
8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
by Subrata Ghoshal
Content preview from 8051 Microcontroller, Internals, Instructions, Programming and Interfacing, 2nd Edition
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TIMER/COUNTER INTERRUPTS
Mode 3 (Two 8-bit Timers)
Modes discussed so far are applicable independently to Timer 0 as well as Timer 1. However, Mode 3 is ap-
plicable only for Timer 0. Timer 1 would stop working if it is set for Mode 3.
As illustrated in Fig. 15.9, Mode 3 converts Timer 0 to two independent 8-bit Timers. TL0 gets its
source signal from RUN/STOP CONTROL block and works as Timer or Counter. Its overfl ow generates
Timer 0 interrupt through TF0 bit of TCON. ISR for this interrupt must be placed at the location 000BH.
TH0 gets its source from the oscillator clock divided by 12, which is the signal. It is designated as Timer
Clock ...
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