User's Manual

MSM80C154S/83C154S/85C154HVS

4.5.2.5.3 Mode 1

M1 M0

In mode 1, timer/counters 0 and 1 both become 16-bit timer/counters by the circuit connection

shown in Figures 4-13 and 4-14.

TL0 and TL1 in timer/counters 0 and 1 serve as the counter for the eight lower bits, and TH0

and TH1 serve as the counter for the eight upper bits.

TL0 is set by the timer/counter 0 carry signal, and TF1 is set by the timer/counter 1 carry

signal. Again note that the timer/counter 1 carry signal can also be used as the serial port

transmission/reception clock.