mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 238

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Timer Interface B (TIMB)
Technical Data
238
NOTE:
Address
Reset:
TOF — TIMB Overflow Flag Bit
TOIE — TIMB Overflow Interrupt Enable Bit
TSTOP — TIMB Stop Bit
Do not set the TSTOP bit before entering wait mode if the TIMB is
required to exit wait mode. Also, when the TSTOP bit is set and the timer
is configured for input capture operation, input captures are inhibited
until TSTOP is cleared.
Read:
Write:
This read/write flag is set when the TIMB counter reaches the modulo
value programmed in the TIMB counter modulo registers. Clear TOF
by reading the TIMB status and control register when TOF is set and
then writing a logic 0 to TOF. If another TIMB overflow occurs before
the clearing sequence is complete, then writing logic 0 to TOF has no
effect. Therefore, a TOF interrupt request cannot be lost due to
inadvertent clearing of TOF. Reset clears the TOF bit. Writing a logic
1 to TOF has no effect.
This read/write bit enables TIMB overflow interrupts when the TOF bit
becomes set. Reset clears the TOIE bit.
This read/write bit stops the TIMB counter. Counting resumes when
TSTOP is cleared. Reset sets the TSTOP bit, stopping the TIMB
counter until software clears the TSTOP bit.
:
1 = TIMB counter has reached modulo value.
0 = TIMB counter has not reached modulo value.
1 = TIMB overflow interrupts enabled
0 = TIMB overflow interrupts disabled
1 = TIMB counter stopped
0 = TIMB counter active
Figure 12-4. TIMB Status and Control Register (TBSC)
$0051
Bit 7
TOF
R
0
0
Timer Interface B (TIMB)
= Reserved
TOIE
6
0
TSTOP
5
1
TRST
4
0
0
R
3
0
0
MC68HC908MR8 — Rev 4.1
PS2
Freescale Semiconductor
2
0
PS1
1
0
Bit 0
PS0
0