Information

Table 3-57. Reference links to related information (continued)
Topic Related module Reference
Power management Power management
Signal Multiplexing Port control Signal Multiplexing
3.8.4.1 LPTMR prescaler/glitch filter clocking options
The prescaler and glitch filter of the LPTMR module can be clocked from one of four
sources determined by the LPTMR0_PSR[PCS] bitfield. The following table shows the
chip-specific clock assignments for this bitfield.
NOTE
The chosen clock must remain enabled if the LPTMR is to
continue operating in all required low-power modes.
LPTMR0_PSR[PCS] Prescaler/glitch filter clock
number
Chip clock
00 0 MCGIRCLK — internal reference clock
(not available in VLPS/LLS/VLLS
modes)
01 1 LPO — 1 kHz clock
10 2 ERCLK32K — secondary external
reference clock
11 3 OSCERCLK — external reference clock
See Clock Distribution for more details on these clocks.
3.8.4.2 LPTMR pulse counter input options
The LPTMR_CSR[TPS] bitfield configures the input source used in pulse counter mode.
The following table shows the chip-specific input assignments for this bitfield.
LPTMR_CSR[TPS] Pulse counter input number Chip input
00 0 CMP0 output
01 1 LPTMR_ALT1 pin
10 2 LPTMR_ALT2 pin
11 3 LPTMR_ALT3 pin
Chapter 3 Chip Configuration
K10 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc. 129