mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 421

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

13.3.2.6
Read: Anytime
Write: Anytime
Freescale Semiconductor
TSFRZ
TFFCA
Reset
TSWAI
Field
TEN
7
6
5
4
W
R
TEN
Timer Enable
0 Disables the main timer, including the counter. Can be used for reducing power consumption.
1 Allows the timer to function normally.
If for any reason the timer is not active, there is no 64 clock for the pulse accumulator because the 64 is
generated by the timer prescaler.
Timer Module Stops While in Wait
0 Allows the timer module to continue running during wait.
1 Disables the timer module when the MCU is in the wait mode. Timer interrupts cannot be used to get the MCU
TSWAI also affects pulse accumulator.
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)
Timer System Control Register 1 (TSCR1)
0
7
out of wait.
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). 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.
= Unimplemented or Reserved
TSWAI
Figure 13-12. Timer System Control Register 1 (TSCR2)
0
6
Table 13-6. TSCR1 Field Descriptions
TSFRZ
MC9S12E256 Data Sheet, Rev. 1.08
0
5
TFFCA
0
4
Description
3
0
0
Chapter 13 Timer Module (TIM16B4CV1)
0
0
2
0
0
1
0
0
0
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