C868_02 Datasheet, PDF (57/244 Pages) Infineon Technologies AG – 8 - Bit CMOS Microcontroller

C868
On-Chip Peripheral Components
TMOD
Timer Register
7
6
GATE1
rw
C/NT1
rw
5
M1(1)
rw
4
M0(1)
rw
3
GATE0
rw
2
C/NT0
rw
[Reset value: 00_H]
1
0
M1(0)
rw
M0(0)
rw
Field
M0(0)
M1(0)
M0(1)
M1(1)
C/NT0
C/NT1
GATE0
GATE1
Bits Typ Description
0
rw Mode select bits
1
4
M1(x) M0(x) Function
5
0
0
8-bit timer:
"THx" operates as 8-bit timer
"TLx" serves as 5-bit
prescaler
0
1
16-bit timer.
"THx" and "TLx" are
cascaded; there is no
prescaler
1
0
8-bit auto-reload timer.
"THx" holds a value which is
to be reloaded into "TLx" each
time it overflows
1
1
Timer 0 :
TL0 is an 8-bit timer controlled
by the standard timer 0
control bits. TH0 is an 8-bit
timer only controlled by timer
1 control bits.
Timer 1 :
Timer/counter 1 stops
2
rw Counter or timer select bit
6
Cleared for timer operation (input from internal
system clock).
3
rw Gating control
7
When set, timer "x" is enabled only while "INT x" pin
is high and "TRx" control bit is set.
User’s Manual
4-13
V 0.4, 2002-01