K60P100M100SF2RM Datasheet, PDF (1067/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 40 Periodic Interrupt Timer (PIT)
40.3.2 Timer Load Value Register (PIT_LDVALn)
These registers select the timeout period for the timer interrupts.
Addresses: PIT_LDVAL0 is 4003_7000h base + 100h offset = 4003_7100h
PIT_LDVAL1 is 4003_7000h base + 110h offset = 4003_7110h
PIT_LDVAL2 is 4003_7000h base + 120h offset = 4003_7120h
PIT_LDVAL3 is 4003_7000h base + 130h offset = 4003_7130h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
TSV
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PIT_LDVALn field descriptions
Field
31–0
TSV
Timer Start Value Bits
Description
These bits set the timer start value. The timer will count down until it reaches 0, then it will generate an
interrupt and load this register value again. Writing a new value to this register will not restart the timer,
instead the value will be loaded once the timer expires. To abort the current cycle and start a timer period
with the new value, the timer must be disabled and enabled again.
40.3.3 Current Timer Value Register (PIT_CVALn)
These registers indicate the current timer position.
Addresses: PIT_CVAL0 is 4003_7000h base + 104h offset = 4003_7104h
PIT_CVAL1 is 4003_7000h base + 114h offset = 4003_7114h
PIT_CVAL2 is 4003_7000h base + 124h offset = 4003_7124h
PIT_CVAL3 is 4003_7000h base + 134h offset = 4003_7134h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
TVL
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PIT_CVALn field descriptions
Field
31–0
TVL
Current Timer Value
Description
If the timer is enabled, these bits represent the current timer value. If the timer is disabled, do not use this
field as its value is unreliable.
NOTE: The timer uses a downcounter. The timer values are frozen in debug mode if the MCR[FRZ] bit is
set.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1067