Freescale Semiconductor HCS08 Series, Reference Manual

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MC9S08JS16 MCU Series Reference Manual, Rev. 4
Freescale Semiconductor 147
Chapter 10
Modulo Timer (S08MTIMV1)
10.1 Introduction
The MTIM is a simple 8-bit timer with several software selectable clock sources and a programmable
interrupt.
The central component of the MTIM is the 8-bit counter, which can operate as a free-running counter or a
modulo counter. A timer overflow interrupt can be enabled to generate periodic interrupts for time-based
software loops.
Figure 10-1 shows the MC9S08JS16 series block diagram with the MTIM highlighted.
10.1.1 MTIM Configuration Information
The external clock for the MTIM module, TCLK, is selected by setting CLKS = 1:1 or 1:0 in MTIMCLK,
which selects the TCLK pin input. The TCLK input on PTB0 can be enabled as external clock inputs to
both MTIM and TPM modules simultaneously.