mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 155
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mc68hc912dg128
Manufacturer Part Number
mc68hc912dg128
Description
M68hc12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912DG128.pdf
(452 pages)
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Technical Data — MC68HC912DG128
11.1 Contents
11.2 Introduction
MC68HC912DG128 — Rev 3.0
MOTOROLA
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10 Real-Time Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
11.11 Clock Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
11.12 Clock Function Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Clock generation circuitry generates the internal and external E-clock
signals as well as internal clock signals used by the CPU and on-chip
peripherals. A clock monitor circuit, a computer operating properly
(COP) watchdog circuit, and a periodic interrupt circuit are also
incorporated into the 68HC(9)12DG128.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Clock Sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Phase-Locked Loop (PLL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Acquisition and Tracking Modes. . . . . . . . . . . . . . . . . . . . . . . 159
Limp-Home and Fast STOP Recovery modes . . . . . . . . . . . . 161
System Clock Frequency formulas . . . . . . . . . . . . . . . . . . . . . 179
Clock Divider Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Computer Operating Properly (COP) . . . . . . . . . . . . . . . . . . .184
Go to: www.freescale.com
Clock Functions
Section 11. Clock Functions
Technical Data
155
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