42.3 LPTMR signal descriptions
Table 42-2. LPTMR signal descriptions
Signal
I/O
Description
LPTMR_ALT
n
I
Pulse Counter Input pin
42.3.1 Detailed signal descriptions
Table 42-3. LPTMR interface—detailed signal descriptions
Signal
I/O
Description
LPTMR_ALT
n
I
Pulse Counter Input
The LPTMR can select one of the input pins to be used in Pulse Counter mode.
State meaning
Assertion—If configured for pulse counter mode with
active-high input, then assertion causes the CNR to
increment.
Deassertion—If configured for pulse counter mode with
active-low input, then deassertion causes the CNR to
increment.
Timing
Assertion or deassertion may occur at any time; input may
assert asynchronously to the bus clock.
42.4 Memory map and register definition
NOTE
The LPTMR registers are reset only on a POR or LVD event.
See
LPTMR memory map
Absolute
address
(hex)
Register name
Width
(in bits)
Access Reset value
Section/
page
4004_0000 Low Power Timer Control Status Register (LPTMR0_CSR)
32
R/W
0000_0000h
4004_0004 Low Power Timer Prescale Register (LPTMR0_PSR)
32
R/W
0000_0000h
4004_0008 Low Power Timer Compare Register (LPTMR0_CMR)
32
R/W
0000_0000h
4004_000C Low Power Timer Counter Register (LPTMR0_CNR)
32
R/W
0000_0000h
LPTMR signal descriptions
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
1056
NXP Semiconductors
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