32 / 132 page

Handshake Solutions
HT80C51 User Manual
Peripheral Modules – Timers 0 and 1
Page 32 of 132
© Philips Electronics N.V. 2005
5.2.5.2.
TIMER/COUNTER 1
TMOD
mode timer 1
function
internal control
(note 1)
external control
(note 2)
0
1
2
3
13bit timer
16bit timer
8bit auto-reload
two 8bit timers
00H
10H
20H
30H
80H
90H
A0H
B0H
[Table 5]
Timer 1 as a Timer
TMOD
mode timer 1
function
internal control
(note 1)
external control
(note 2)
0
1
2
3
13bit timer
16bit timer
8bit auto-reload
two 8bit timers
40H
50H
60H
70H
C0H
D0H
E0H
F0H
[Table 6]
Timer 1 as a Counter
NOTES:
1.
The timer is turned ON/OFF by setting/clearing bit TR1 in the software.
2.
The Timer is turned ON, if both t01_int0_n_i = 1 and TR0 = 1 (hardware control).