mc68hc912d60c Freescale Semiconductor, Inc, mc68hc912d60c Datasheet - Page 443

• Manufacturer Part Number: mc68hc912d60c
• Description: Hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Technical Data — MC68HC912D60A
23.1 Contents
23.2 Introduction
23.3 Flash Protection Feature
MC68HC912D60A — Rev. 3.1
Freescale SemiconductorAppendix: Information on MC68HC912D60A Mask Set Changes
Section 23. Appendix: Information on MC68HC912D60A
23.2
23.3
23.4
23.5
23.6
23.7
The following changes have been made on the MC68HC912D60A from
the 2K38K mask set to the 1L02H mask set.
Further improvements were made to the oscillator circuit to create the
2L02H mask set (MC68HC912D60C) and the 3L02H mask set
(MC68HC912D60P). These are described in detail in the oscillator
section of this document.
A flash protection bit has been added to the EEMCR register to protect
the Flash memory from accidental program or erasure. This bit is loaded
from the EEPROM Shadow word at reset, so that the flash can be
protected before any software is executed.
See EEPROM and Flash sections for more details.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443
Clock Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444
Pseudo Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444
Oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .444
Flash Protection Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 443
PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445
Mask Set Changes
Technical Data
443