K60P100M100SF2RM Datasheet, PDF (1077/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Field
2
TFC
1
TMS
0
TEN
Chapter 41 Low power timer (LPTMR)
LPTMRx_CSR field descriptions (continued)
Description
The Timer Pin Polarity configures the polarity of the input source in Pulse Counter mode. The Timer Pin
Polarity should only be changed when the LPTMR is disabled.
0 Pulse Counter input source is active high, and LPTMR Counter Register will increment on the rising
edge.
1 Pulse Counter input source is active low, and LPTMR Counter Register will increment on the falling
edge.
Timer Free Running Counter
When clear the Timer Free Running Counter configures the LPTMR Counter Register to reset whenever
the Timer Compare Flag is set. When set, the Timer Free Running Counter configures the LPTMR
Counter Register to reset on overflow. The Timer Free Running Counter should only be altered when the
LPTMR is disabled.
0 LPTMR Counter Register is reset whenever the Timer Compare Flag is set.
1 LPTMR Counter Register is reset on overflow.
Timer Mode Select
The Timer Mode Select configures the mode of the LPTMR. The Timer Mode Select should only be
altered when the LPTMR is disabled.
0 Time Counter mode.
1 Pulse Counter mode.
Timer Enable
When the Timer Enable bit is clear, it resets the LPTMR internal logic (including the LPTMR Counter
Register and Timer Compare Flag). When the Timer Enable bit is set, the LPTMR is enabled. When
writing 1 to this bit, bits LPTMR_CSR[5:1] should not be altered.
0 LPTMR is disabled and internal logic is reset.
1 LPTMR is enabled.
41.3.2 Low Power Timer Prescale Register (LPTMRx_PSR)
Addresses: LPTMR0_PSR is 4004_0000h base + 4h offset = 4004_0004h
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
0
W
PRESCALE
PCS
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
LPTMRx_PSR field descriptions
Field
31–7
Reserved
Description
This read-only field is reserved and always has the value zero.
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1077