MC68HC08AZ60A Datasheet, PDF (305/480 Pages) Motorola, Inc – Microcontrollers

Advance Information — MC68HC08AZ60A
Section 19. Programmable Interrupt Timer (PIT)
19.1 Contents
19.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
19.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
19.4 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .306
19.5 PIT Counter Prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
19.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
19.6.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
19.6.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
19.7 PIT During Break Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . 308
19.8 I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
19.8.1 PIT Status and Control Register . . . . . . . . . . . . . . . . . . . 309
19.8.2 PIT Counter Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
19.8.3 PIT Counter Modulo Registers . . . . . . . . . . . . . . . . . . . . 313
19.2 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 19-1 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.
MC68HC08AZ60A — Rev 0.0
MOTOROLA
Programmable Interrupt Timer (PIT)
Advance Information
305