NXP Semiconductors MC9S08LG16, Reference Manual

Page: 327 / 373

MC9S08LG32 MCU Series, Rev. 5
Freescale Semiconductor 327
Chapter 17
Modulo Timer (S08MTIMV1)
17.1 Introduction
The MTIM is a simple 8-bit timer with four software-selectable clock sources and a programmable
interrupt.
The central component of the MTIM is the 8-bit counter that 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 17-1 shows the MC9S08LG32 series block diagram highlighting the MTIM block and pin.
17.1.1 MTIM Clock Gating
The bus clock to the MTIM can be gated on and off using the MTIM bit in SCGC1. This bit is cleared after
any reset, which disables the bus clock to this module. To conserve power, the MTIM bit can be cleared
to disable the clock to this module when not in use. See
Section 5.7, “Peripheral Clock Gating ,” for details.