SAB80C517-M16 SIEMENS [Siemens Semiconductor Group], SAB80C517-M16 Datasheet - Page 99

• Manufacturer Part Number: SAB80C517-M16
• Description: 8-Bit CMOS Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Figure 7-35
Special Function Register T2CON
Timer 2 control register. Bit-addressable register which controls timer 2 function and compare mode
of registers CRC, CC1 to CC3.
Bit
T2I1
T2R1
Semiconductor Group
0
0
1
1
0
1
1
0C8 H
T2CM
T2PS
0CF H
T2PS
T2I0
T2R0
These bits are not used in controlling the CCU.
0
1
0
1
X
0
1
0CE H
I3FR
Symbol
Timer 2 input selection
No input selected, timer 2 stops
Timer function
input frequency =
Counter function, external input controlled by pin T2/P1.7.
Gated timer function, input controlled by pin T2/P1.7
Timer 2 reload mode selection
Reload disabled
Mode 0: auto-reload upon timer 2 overflow (TF2)
Mode 1: reload upon falling edge at pin T2EX/P1.5.
Compare mode bit for registers CRC, CC1 through CC3. When set,
compare mode 1 is selected. T2CM = 0 selects compare mode 0.
Prescaler select bit. When set, timer 2 is clocked in the “timer” or “gated
timer” function with 1/24 of the oscillator frequency.
T2PS = 0 gates
operation of timer 2.
0CD H 0CC H
I2FR
T2R1
f
OSC
f
OSC
/12 to timer 2. T2PS must be 0 for the counter
100
/12 (T2PS = 0) or
0CB H
T2R0
On-Chip Peripheral Components
0CA H
T2CM
f
0C9 H
OSC
T2I1
/24 (T2PS = 1)
0C8 H
T2I0
T2CON