Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 用户手册
产品代码
DEMO9S12XHY256
Timer Module (TIM16B8CV2) Block Description
MC9S12XHY-Family Reference Manual Rev. 1.04
Freescale Semiconductor
533
NOTE
The newly selected prescale factor will not take effect until the next
synchronized edge where all prescale counter stages equal zero.
synchronized edge where all prescale counter stages equal zero.
16.3.2.12 Main Timer Interrupt Flag 1 (TFLG1)
Read: Anytime
Write: Used in the clearing mechanism (set bits cause corresponding bits to be cleared). Writing a zero
will not affect current status of the bit.
will not affect current status of the bit.
16.3.2.13 Main Timer Interrupt Flag 2 (TFLG2)
TFLG2 indicates when interrupt conditions have occurred. To clear a bit in the flag register, write the bit
to one while TEN bit of TSCR1 or PAEN bit of PACTL is set to one.
to one while TEN bit of TSCR1 or PAEN bit of PACTL is set to one.
Read: Anytime
Write: Used in clearing mechanism (set bits cause corresponding bits to be cleared).
Any access to TCNT will clear TFLG2 register if the TFFCA bit in TSCR register is set.
Module Base + 0x000E
7
6
5
4
3
2
1
0
R
C7F
C6F
C5F
C4F
C3F
C2F
C1F
C0F
W
Reset
0
0
0
0
0
0
0
0
Figure 16-20. Main Timer Interrupt Flag 1 (TFLG1)
Table 16-16. TRLG1 Field Descriptions
Field
Description
7:0
C[7:0]F
Input Capture/Output Compare Channel “x” Flag — These flags are set when an input capture or output
compare event occurs. Clearing requires writing a one to the corresponding flag bit while TEN or PAEN is set to
one.
compare event occurs. Clearing requires writing a one to the corresponding flag bit while TEN or PAEN is set to
one.
When TFFCA bit in TSCR register is set, a read from an input capture or a write into an output compare channel
(0x0010–0x001F) will cause the corresponding channel flag CxF to be cleared.
(0x0010–0x001F) will cause the corresponding channel flag CxF to be cleared.
Module Base + 0x000F
7
6
5
4
3
2
1
0
R
TOF
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
Unimplemented or Reserved
Figure 16-21. Main Timer Interrupt Flag 2 (TFLG2)