MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 211

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

Chapter 11
System Control Module (SCM)
11.1 Introduction
This section details the functionality of the System Control Module (SCM) which provides the
programming model for the System Access Control Unit (SACU), the system bus arbiter, a 32-bit
core watchdog timer (CWT), and the system control registers and logic. Specifically, the system
control includes the internal peripheral system (IPS) base address register (IPSBAR), the
processor’s dual-port RAM base address register (RAMBAR), and system control registers that
include the core watchdog timer control.
11.1.1 Overview
The SCM provides the control and status for a variety of functions including base addressing and
address space masking for both the IPS peripherals and resources (IPSBAR) and the ColdFire core
memory space (RAMBAR). The MCF5235 CPU core supports one memory bank for the internal
SRAM.
The SACU provides the mechanism needed to implement secure bus transactions to the system
address space.
The programming model for the system bus arbitration resides in the SCM. The SCM sources the
necessary control signals to the arbiter for bus master management.
The CWT provides a means of preventing system lockup due to uncontrolled software loops via a
special software service sequence. If periodic software servicing action does not occur, the CWT
times out with a programmed response (interrupt) to allow recovery or corrective action to be
taken.
11.1.2 Features
The SCM includes these distinctive features:
Freescale Semiconductor
The core watchdog timer is available to provide compatibility with the
watchdog timer implemented on previous ColdFire devices. However,
there is a second watchdog timer available on the MCF5235 that has
new features. See
information. Please note that the core watchdog timer is unable to
reset the device. It is only permitted to assert an interrupt. For
resetting the device, use the second watchdog timer.
Chapter 22, “Watchdog Timer
MCF5235 Reference Manual, Rev. 2
NOTE
Module” for more
11-1