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What is the operation for mode 0?(a) 13-bit timer mode, 8-bit timer/counter THx and TLx as 5-bit prescalar(b) 16-bit timer mode, 16-bit timer/counter THx and TLx are cascaded, no prescalar(c) 8-bit auto reload mode, 8-bit auto reload time/counter; THx holds a value which is to be reloaded into TLx each time it overflows(d) Spilt timer modeThe question was asked during a job interview.My question is from Microcontroller (8051- Pin, Registers, Timers) in portion Prototyping Embedded Devices of IOT

Answer»

The CORRECT choice is (a) 13-bit timer MODE, 8-bit timer/counter THx and TLx as 5-bit prescalar

To elaborate: Mode 0 is exactly same like mode 1 EXCEPT that it is a 13-bit timer instead of 16-bit. The 13-bit counter can hold values between 0000 to 1FFH in Th-Tl.


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