C517A_99 Datasheet, PDF (86/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C517A
6.2.1.4 Mode 2
Mode 2 configures the timer register as an 8-bit counter (TL0) with automatic reload, as shown in
figure 6-11. Overflow from TL0 not only sets TF0, but also reloads TL0 with the contents of TH0,
which is preset by software. The reload leaves TH0 unchanged.
OSC
P3.4/T0
=1
Gate
P3.2/INTO
÷ 12
C/T = 0
C/T = 1
TR0
&
1
TL0
(8 Bits)
Interrupt
TF0
Control
Reload
TH0
(8 Bits)
MCS02140
Figure 6-11
Timer/Counter 0,1, Mode 2: 8-Bit Timer/Counter with Auto-Reload
Semiconductor Group
6-20