S9S12GN32F0MLC Datasheet, PDF (759/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet

Timer Module (TIM16B8CV3)
Table 23-6. TSCR1 Field Descriptions (continued)
Field
5
TSFRZ
4
TFFCA
3
PRNT
Description
Timer Stops While in Freeze Mode
0 Allows the timer counter to continue running while in freeze mode.
1 Disables the timer counter whenever the MCU is in freeze mode. This is useful for emulation.
TSFRZ does not stop the pulse accumulator.
Timer Fast Flag Clear All
0 Allows the timer flag clearing to function normally.
1 For TFLG1(0x000E), a read from an input capture or a write to the output compare channel (0x0010–0x001F)
causes the corresponding channel flag, CnF, to be cleared. For TFLG2 (0x000F), any access to the TCNT
register (0x0004, 0x0005) clears the TOF flag. Any access to the PACNT registers (0x0022, 0x0023) clears
the PAOVF and PAIF flags in the PAFLG register (0x0021) if channel 7 exists. This has the advantage of
eliminating software overhead in a separate clear sequence. Extra care is required to avoid accidental flag
clearing due to unintended accesses.
Precision Timer
0 Enables legacy timer. PR0, PR1, and PR2 bits of the TSCR2 register are used for timer counter prescaler
selection.
1 Enables precision timer. All bits of the PTPSR register are used for Precision Timer Prescaler Selection, and
all bits.
This bit is writable only once out of reset.
23.3.2.7 Timer Toggle On Overflow Register 1 (TTOV)
Module Base + 0x0007
R
W
Reset
7
TOV7
0
Read: Anytime
Write: Anytime
6
TOV6
5
TOV5
4
TOV4
3
TOV3
2
TOV2
1
TOV1
0
0
0
0
0
0
Figure 23-13. Timer Toggle On Overflow Register 1 (TTOV)
0
TOV0
0
Table 23-7. TTOV Field Descriptions
Note: Writing to unavailable bits has no effect. Reading from unavailable bits return a zero.
Field
Description
7:0
TOV[7:0]
Toggle On Overflow Bits — TOVx toggles output compare pin on overflow. This feature only takes effect when
in output compare mode. When set, it takes precedence over forced output compare but not channel 7 override
events.
0 Toggle output compare pin on overflow feature disabled.
1 Toggle output compare pin on overflow feature enabled.
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
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