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S9S12G128F0MLL Datasheet, PDF (759/1292 Pages) Freescale Semiconductor, Inc – Reference Manual and Date Sheet | |||
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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 ï¬ag clearing to function normally.
1 For TFLG1(0x000E), a read from an input capture or a write to the output compare channel (0x0010â0x001F)
causes the corresponding channel ï¬ag, CnF, to be cleared. For TFLG2 (0x000F), any access to the TCNT
register (0x0004, 0x0005) clears the TOF ï¬ag. Any access to the PACNT registers (0x0022, 0x0023) clears
the PAOVF and PAIF ï¬ags 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 ï¬ag
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 Overï¬ow 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 Overï¬ow 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 Overï¬ow Bits â TOVx toggles output compare pin on overï¬ow. 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 overï¬ow feature disabled.
1 Toggle output compare pin on overï¬ow feature enabled.
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
761
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