MC68HC08AZ32A Datasheet, PDF (283/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AZ32A
Section 18. Programmable Interrupt Timer (PIT)
18.1 Contents
18.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
18.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
18.4 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .284
18.5 PIT Counter Prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
18.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
18.6.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
18.6.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
18.7 PIT During Break Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . 286
18.8 I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
18.8.1 PIT Status and Control Register . . . . . . . . . . . . . . . . . . . 287
18.8.2 PIT Counter Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
18.8.3 PIT Counter Modulo Registers . . . . . . . . . . . . . . . . . . . . 291
18.2 Introduction
This section describes the Programmable Interrupt Timer (PIT) which is
a periodic interrupt timer whose counter is clocked internally via software
programmable options. Figure 18-1 is a block diagram of the PIT.
For further information regarding timers on M68HC08 family devices,
please consult the HC08 Timer Reference Manual, TIM08RM/AD.
MC68HC08AZ32A — Rev 1.0
MOTOROLA
Programmable Interrupt Timer (PIT)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
283