C504 SIEMENS [Siemens Semiconductor Group], C504 Datasheet - Page 21

• Manufacturer Part Number: C504
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Timer 2
Timer 2 is a 16-bit Timer/Counter with an up/down count feature. It can operate either as timer or as
an event counter which is selected by bit C/T2 (T2CON.1). It has three operating modes as shown
in table 5.
Table 5
Timer/Counter 2 Operating Modes
Mode
16-bit
Auto-
reload
16-bit
Cap-
ture
Baud
Rate
Gene-
rator
off
Note:
Semiconductor Group
=
R CLK
T CLK
or
X
0
0
0
0
0
0
1
1
T2CON
falling edge
RL2
CP/
X
X
X
0
0
0
0
1
1
TR2
1
1
1
1
1
1
1
1
0
T2MOD
DCEN
X
X
X
X
X
0
0
1
1
T2CON
EXEN
X
X
X
0
1
0
1
0
1
21
T2EX
P1.1/
X
X
X
X
0
1
Remarks
reload upon
overflow
reload trigger
(falling edge)
Down counting
Up counting
16 bit Timer/
Counter (only
up-counting)
capture TH2,
TL2
RC2L
no overflow
interrupt
request (TF2)
extra external
interrupt
(“Timer 2”)
Timer 2 stops
RC2H,
internal
f
f
f
OSC
OSC
OSC
–
Input Clock
/12
/12
/2
(P1.0/T2)
external
f
f
f
OSC
OSC
OSC
max
max
max
–
C504
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