By: Masud-ul-Hasan
7
•Timer Mode 1 (16-bit Timer):
–Same as mode 0 except that it is 16-bit. Timer high-byte (THx) is cascaded the timer low-byte (TLx) to form a 16-bit timer, where x = 0 or 1.
–Clock is applied to the combined high and low-byte timer registers.
–Overflow occurs on the FFFFH-to-0000H and sets the timer overflow flag.
–MSB is THx bit 7, and LSB is TLx bit 0.
–LSB toggles at clock frequency/21 and MSB at clock frequency/216 
Timer Modes (cont'd)
Timer
clock
Overflow
flag
THx
8-bits
TFx
Interrupt
TLx
8-bits
7
0
7
0