Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

HANEL

PROGRAMMING

TIMERSTMODRegister

‰Both timers 0 and 1 use the same register, called TMOD (timer mode), to set the various timer operation modes‰TMOD is a 8-bit register

¾The lower 4 bits are for Timer 0 ¾The upper 4 bits are for Timer 1¾In each case,

ƒThe lower 2 bits are used

to set the timer mode

ƒThe upper 2 bits to

specify the operation

Timer1

GATE

C/T

M1

M0

(MSB)

Timer0

GATE

C/T

M1

(LSB)M0