MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 415

• 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 20
Enhanced Time Processing Unit (eTPU)
20.1
The enhanced time processing unit (eTPU) is a new time unit featured on the MCF5235
microcontroller that operates in parallel with the MCF5235 ColdFire core. The eTPU processes
instructions and real-time input events, performs output waveform generation, and accesses shared
data without the MCF5235 Coldfire core’s intervention. Consequently, the core setup and service
times for each timer event are minimized or eliminated.
High resolution timing is achieved by the following on the eTPU:
The eTPU provides more specialized timer processing than the MCF5235 Coldfire core can
achieve. This is partially due to the eTPU implementation, which includes specific instructions for
handling and processing time events. There are two types of timing events:
Service time is the time spent servicing an event. In general, the service time in microcontrollers
is constrained because the instruction set is not optimized for time function synthesis. However,
the eTPU instruction set is optimized for such operations, so time functions can be implemented
with much fewer instructions than the MCF5235 ColdFire core.
Freescale Semiconductor
• eTPU dedicated channel hardware reduces the channel request rate and timer function
• Reduced or eliminated host interrupt service time.
• Input pin transition (capture)
• Selected time base match (a selected time base counter reached or exceeded a
latency.
The eTPU has dedicated channel hardware that implements essential timer functionality.
Every eTPU channel has two match and two capture registers, as opposed to the previous
TPUs which only had one of each register. The doubling of these registers allows the
generation/capture of complex waveforms with a reduction in required servicing by the
eTPU microengine.
Many interrupts, service requests, are handled by the eTPU microengine, thus freeing the
host processor to handle other operations.
preprogrammed value)
Introduction
Please note that the MCF5232 and MCF5234 only contain a 16
channel eTPU. References in this chapter to a 32 channel eTPU
pertain only to the MCF5233 and MCF5235. Please refer to
for details on device configurations.
MCF5235 Reference Manual, Rev. 2
NOTE
Table 1-1
20-1