mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 749

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

For low-power stop modes:
34.2.2.3 MTIM16 in Active Background Mode
The MTIM16 stops all counting until the microcontroller returns to normal user operating
mode. Counting resumes from the suspended value as long as an MTIM16 reset did not
occur (TRST written to a 1).
34.3 External Signal Description
This section describes the module external signals.
34.3.1 TCLK — External Clock Source Input into MTIM16
The MTIM16 includes one external signal, TCLK, used to input an external clock when
selected as the MTIM16 clock source. The signal properties of TCLK are shown in the
following table.
The TCLK input must be synchronized by the bus clock. Also, variations in duty cycle
and clock jitter must be accommodated. As a result, the TCLK signal must be limited to
one-fourth of the bus frequency.
The TCLK pin can be muxed with a general-purpose port pin. Refer to the chip-level
signal multiplexing and pin assignment details for more information.
Freescale Semiconductor, Inc.
• If the device exits any of these modes with a reset, the MTIM16 module enters its
• If the device exits any of these modes with an interrupt, the MTIM16 module
• If the counter was active upon entering any of these modes, the count resumes from
reset state.
continues from its state in the low-power stop mode.
the current value.
Signal
TCLK
External clock source input into MTIM16
Function
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Table 34-1. Signal Properties
Preliminary
Chapter 34 Modulo Timer (MTIM)
I/O
I
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