MC68HC08AZ32A — Rev 1.0
Technical Data
MOTOROLA
Programmable Interrupt Timer (PIT)
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283
Technical Data — MC68HC08AZ32A
Section 18. Programmable Interrupt Timer (PIT)
18.1 Contents
18.2
Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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18.3
Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
284
18.4
Functional Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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18.5
PIT Counter Prescaler
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
285
18.6
18.6.1
18.6.2
Low-Power Modes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
286
Wait Mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
286
Stop Mode
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286
18.7
PIT During Break Interrupts
. . . . . . . . . . . . . . . . . . . . . . . . .
286
18.8
18.8.1
18.8.2
18.8.3
I/O Registers
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287
PIT Status and Control Register
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287
PIT Counter Registers
. . . . . . . . . . . . . . . . . . . . . . . . . . .
290
PIT Counter Modulo Registers
. . . . . . . . . . . . . . . . . . . .
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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.
F
Freescale Semiconductor, Inc.
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