56F8167 datasheet(41/184 Pages) FREESCALE

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Registers

56F8367 Technical Data, Rev. 8

Freescale Semiconductor

Preliminary

the OCCS_COHL bit high as well.

Figure 3-4 Connecting an External Clock Register

3.3 Registers

When referring to the register definitions for the OCCS in the 56F8300 Peripheral User Manual, use the

contain this oscillator.

Part 4 Memory Operating Modes (MEM)

4.1 Introduction

The 56F8367 and 56F8167 devices are 16-bit motor-control chips based on the 56800E core. These parts

use a Harvard-style architecture with two independent memory spaces for Data and Program. On-chip

RAM and Flash memory are used in both spaces.

This chapter provides memory maps for:

•

Program Address Space including the Interrupt Vector Table

•

Data Address Space including the EOnCE Memory and Peripheral Memory Maps

On-chip memory sizes for each device are summarized in Table 4-1. Flash memories’ restrictions are

identified in the “Use Restrictions” column of Table 4-1.

Note: Data Flash and Program RAM are NOT available on the 56F8167 device.

Table 4-1 Chip Memory Configurations

On-Chip Memory

56F8367

56F8167

Use Restrictions

Program Flash

512KB

Erase/Program via Flash interface unit and word writes to

CDBW

Data Flash

32KB

—

Erase/Program via Flash interface unit and word writes to

CDBW. Data Flash can be read via one of CDBR or XDB2, but

not both simultaneously

Program RAM

4KB

—

None

Data RAM

32KB

None

Program Boot Flash

32KB

Erase/Program via Flash Interface unit and word to CDWB

XTAL

EXTAL

External

VSS

Clock

Note: When using an external clocking source with

this configuration, the input “CLKMODE” should be

high and the COHL bit in the OSCTL register

should be set to 1.

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