mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 388

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Module Base + 0x0010 = TC0H
Module Base + 0x0011 = TC0L
Timer Module (TIM16B8CV3)
Any access to TCNT will clear TFLG2 register if the TFFCA bit in TSCR register is set.
12.3.2.14 Timer Input Capture/Output Compare Registers High and Low 0–7
1
Depending on the TIOS bit for the corresponding channel, these registers are used to latch the value of the
free-running counter when a defined transition is sensed by the corresponding input capture edge detector
or to trigger an output action for output compare.
Read: Anytime
Write: Anytime for output compare function.Writes to these registers have no meaning or effect during
input capture. All timer input capture/output compare registers are reset to 0x0000.
388
This register is available only when the corresponding channel exists and is reserved if that channel does not exist. Writes to
a reserved register have no functional effect. Reads from a reserved register return zeroes.
Field
TOF
7
Reset
Reset
W
W
R
R
Timer Overflow Flag — Set when 16-bit free-running timer overflows from 0xFFFF to 0x0000. Clearing this bit
requires writing a one to bit 7 of TFLG2 register while the TEN bit of TSCR1 or PAEN bit of PACTL is set to one
(See also TCRE control bit explanation.)
0x0012 = TC1H
0x0014 = TC2H
0x0016 = TC3H
0x0013 = TC1L
0x0015 = TC2L
0x0017 = TC3L
(TCxH and TCxL)
Read/Write access in byte mode for high byte should takes place before low
byte otherwise it will give a different result.
Figure 12-22. Timer Input Capture/Output Compare Register x High (TCxH)
Bit 15
Figure 12-23. Timer Input Capture/Output Compare Register x Low (TCxL)
Bit 7
15
0
7
0
Bit 14
Bit 6
14
0
0
6
MC9S12VR Family Reference Manual,
Preliminary - Subject to Change Without Notice
Table 12-17. TRLG2 Field Descriptions
0x0018 = TC4H
0x001A = TC5H
0x001C = TC6H
0x001E = TC7H
0x0019 = TC4L
0x001B = TC5L
0x001D = TC6L
0x001F = TC7L
Bit 13
Bit 5
13
0
0
5
NOTE
Bit 12
Bit 4
12
0
0
4
Description
Bit 11
Bit 3
11
0
0
3
Rev. 2.2
Bit 10
Bit 2
10
0
0
2
Freescale Semiconductor
Bit 9
Bit 1
0
0
9
1
Bit 8
Bit 0
0
0
0
0