mc9rs08ka2 Freescale Semiconductor, Inc, mc9rs08ka2 Datasheet - Page 90

• Manufacturer Part Number: mc9rs08ka2
• Description: Rs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Chapter 11 Modulo Timer (RS08MTIMV1)
11.3.1
MTIMSC contains the overflow status flag and control bits which are used to configure the interrupt
enable, reset the counter, and stop the counter.
90
TRST
TSTP
Field
TOIE
TOF
7
6
5
4
Reset:
MTIMMOD
MTIMCNT
MTIMCLK
W
MTIMSC
R
MTIM Status and Control Register (MTIMSC)
MTIM Overflow Flag — This read-only bit is set when the MTIM counter register overflows to $00 after reaching
the value in the MTIM modulo register. Clear TOF by reading the MTIMSC register while TOF is set, then writing
a 0 to TOF. TOF is also cleared when TRST is written to a 1 or when any value is written to the MTIMMOD
register.
0 MTIM counter has not reached the overflow value in the MTIM modulo register.
1 MTIM counter has reached the overflow value in the MTIM modulo register.
MTIM Overflow Interrupt Enable — This read/write bit enables MTIM overflow interrupts. If TOIE is set, then
an interrupt is generated when TOF = 1. Reset clears TOIE. Do not set TOIE if TOF = 1. Clear TOF first, then set
TOIE.
0 TOF interrupts are disabled. Use software polling.
1 TOF interrupts are enabled.
MTIM Counter Reset — When a 1 is written to this write-only bit, the MTIM counter register resets to $00 and
TOF is cleared. Reading this bit always returns 0.
0 No effect. MTIM counter remains at current state.
1 MTIM counter is reset to $00.
MTIM Counter Stop — When set, this read/write bit stops the MTIM counter at its current value. Counting
resumes from the current value when TSTP is cleared. Reset sets TSTP to prevent the MTIM from counting.
0 MTIM counter is active.
1 MTIM counter is stopped.
Name
TOF
7
0
Figure 11-3. MTIM Status and Control Register (MTIMSC)
TOIE
W
W
W
W
R
R
R
R
0
6
Table 11-3. MTIMSC Field Descriptions
Table 11-2. MTIM Register Summary
MC9RS08KA2 Series Data Sheet, Rev. 3
TOF
0
7
TRST
0
0
5
TOIE
0
6
TSTP
1
4
Description
TRST
5
0
CLKS
TSTP
0
0
3
4
COUNT
MOD
0
3
0
0
2
0
2
Freescale Semiconductor
0
0
1
PS
0
1
0
0
0
0
0