MC68HC812A4 Datasheet, PDF (29/342 Pages) Motorola, Inc – 16-bit device composed of standard on-chip peripheral modules connected by an intermodule bus. Modules include

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Section 1. General Description
1.1 Contents
1.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
1.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
1.4 Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
1.5 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
1.6 Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
1.2 Introduction
The MC68HC812A4 microcontroller unit (MCU) is a 16-bit device
composed of standard on-chip peripheral modules connected by an
intermodule bus. Modules include:
• 16-bit central processor unit (CPU12)
• Lite integration module (LIM)
• Two asynchronous serial communications interfaces
(SCI0 and SCI1)
• Serial peripheral interface (SPI)
• Timer and pulse accumulator module
• 8-bit analog-to-digital converter (ATD)
• 1-Kbyte random-access memory (RAM)
• 4-Kbyte electrically erasable, programmable read-only memory
(EEPROM)
• Memory expansion logic with chip selects, key wakeup ports, and
a phase-locked loop (PLL)
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MOTOROLA
General Description
MC68HC812A4 — Rev. 3.0
29