MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 457

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Technical Data — MC68HC912DT128A
24.1 Contents
24.2 Introduction
24.3 Oscillator – Major Changes
MC68HC912DT128A — Rev 4.0
MOTOROLA
Section 24. Appendix: Information on MC68HC912DT128A
Appendix: Information on MC68HC912DT128A Mask Set Changes
24.2
24.3
24.4
24.5
24.6
24.7
24.8
The following improvements were made to create the 1L05H mask set
(MC68HC912Dx128C) and the 2L05H mask set (MC68HC912Dx128P).
Previous MC68HC912DT128A mask sets 3K91D (TSMC wafer fab.)
and 0L05H (Motorola TSC6 wafer fab.) are equivalent with the only
change being the wafer fab location.
The following are the primary differences between the previous Colpitts
("A") and the new Colpitts ("C") oscillator configurations.
1. Optimisation of the bias current to the amplifier for less process
2. Addition of hysteresis to the clock input buffer to reduce sensitivity
variation.
to noise.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457
Oscillator – Major Changes . . . . . . . . . . . . . . . . . . . . . . . . . .457
Flash Protection Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 458
Clock Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .458
Pseudo Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 458
Oscillator – Minor Changes . . . . . . . . . . . . . . . . . . . . . . . . . .459
PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459
Mask Set Changes
Technical Data
457