MCF52110 ColdFire® Integrated Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor
9-1
Preliminary
Chapter 9
Chip Configuration Module (CCM)
9.1
Introduction
This chapter describes the various operating configurations of the device. It also provides a description of
signals used by the CCM and a programming model.
9.1.1
Features
The chip configuration for the MCF52110 is determined by the chip configuration module (CCM). The
configuration options selectable at reset are:
•
Operating Mode
— Serial flash programming mode (EzPort mode)
— Single-chip mode
•
Clock Reference
— External oscillator
— External crystal
— On-chip 8 MHz oscillator
•
Phase-locked look (PLL)
•
BDM or JTAG mode
9.2
External Signal Descriptions
provides an overview of the CCM signals.
Table 9-1. Signal Properties
Name
Function
Reset State
1
1
The use of external pull-up/down resistors is highly recommended.
RCON
Reset configuration select
Internal weak pull-up device
CLKMOD[1:0]
Clock mode select
2
2
Refer to
for more information.
—
JTAG_EN
JTAG or BDM mode selection
Internal weak pull-down device
TEST
Test mode selection
Internal weak pull-down device
