Datasheet

MC68HC812A4 Data Sheet, Rev. 7
Freescale Semiconductor 117
Chapter 12
Standard Timer Module
12.1 Introduction
The standard timer module is a 16-bit, 8-channel timer with:
• Input capture
• Output compare
• Pulse accumulator functions
A block diagram is given in Figure 12-1.
12.2 Register Map
A summary of the input/oputput (I/O) registers is shown in Figure 12-2.
NOTE
The register block can be mapped to any 2-Kbyte boundary within the
standard 64-Kbyte address space. The register block occupies the first 512
bytes of the 2-Kbyte block. This register map shows default addressing
after reset.
In normal modes, writing to a reserved bit has no effect and reading returns
logic 0.
In any mode, writing to an unimplemented bit has no effect and reading
returns a logic 0.