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Technical Data - MC68HC908AB32
Section 13. Programmable Interrupt Timer (PIT)
13.1 Contents
13.2 Introduction
MC68HC908AB32
Rev. 1.0
-
MOTOROLA
13.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
13.3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
13.4
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
13.4.1
PIT Counter Prescaler . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
13.5
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
13.5.1
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
13.5.2
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
13.6
PIT During Break Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . 224
13.7
I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
13.7.1
PIT Status and Control Register. . . . . . . . . . . . . . . . . . . . . 225
13.7.2
PIT Counter Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
13.7.3
PIT Counter Modulo Registers . . . . . . . . . . . . . . . . . . . . . . 228
This section describes the programmable interrupt timer (PIT), which is
a timer whose counter is clocked internally via software programmable
options.
Figure 13-1
Programmable Interrupt Timer (PIT)
is a block diagram of the PIT.
Technical Data
221
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