sak-c868p-1rr Infineon Technologies Corporation, sak-c868p-1rr Datasheet - Page 70

• Manufacturer Part Number: sak-c868p-1rr
• Description: 8 - Bit Cmos Microcontroller
• Manufacturer: Infineon Technologies Corporation

Figure 4-6
4.6.5.2
If DCEN=1, the up-down count selection is enabled. The direction of count is determined
by the level at input pin T2EX. The operational block diagram is shown in
A logic 1 at pin T2EX sets the timer/counter 2 to up counting mode. The timer/counter,
therefore, counts up to a maximum of FFFF
counter registers are reloaded with a 16-bit reload of the RC2L/H registers. A fresh count
sequence is started and the timer counts up from this reload value as in the previous
count sequence. This reload value is chosen by software, prior to the occurrence of an
overflow condition.
A logic 0 at pin T2EX sets the timer/counter 2 to down counting mode. The timer/counter
counts down and underflows when the T2L/H value reaches the value stored at registers
User’s Manual
f
SYS
T2EX
Pin
Pin
T2
Up/Down Count Enabled
12
C/T2 = 0
C/T2 = 1
Auto-Reload Mode (DCEN = 0)
EXEN2
TR2
OR
4-26
H
. Upon overflow, bit TF2 is set and the timer/
RC2L/H
T2L/H
On-Chip Peripheral Components
Overflow
EXF2
TF2
Figure
V 1.0, 2003-01
OR
Interrupt
Timer 2
C868
4-7.