参数资料
型号: MC68334GCFC20
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 20 MHz, MICROCONTROLLER, PQFP132
封装: PLASTIC, QFP-132
文件页数: 47/76页
文件大小: 444K
代理商: MC68334GCFC20
MC68334
MOTOROLA
MC68334TS/D REV. 1
51
5 Time Processor Unit
The time processor unit (TPU) is an intelligent, semi-autonomous microcontroller designed for timing
control. The TPU operates simultaneously with the CPU; it processes ROM instructions, schedules
tasks, performs input and output, and accesses shared data without CPU intervention. Consequently,
setup and service time for each timer event are minimized. The figure below is a simplified block dia-
gram of the TPU.
Figure 11 TPU Block Diagram
5.1 Overview
The TPU can be viewed as a special-purpose microcomputer that performs a programmable series of
two operations, match and capture. Each occurrence of either operation is called an event. A pro-
grammed series of events is called a function. TPU functions replace software functions that would re-
quire host CPU interrupt service. Two sets of mask-programmed functions are currently available. Refer
to 5.6 Time Functions for more information.
5.2 Programmer's Model
The TPU control register address map occupies 512 bytes. The “Access” column in the TPU address
map below indicates which registers are accessible only at the supervisor privilege level and which can
be assigned to either the supervisor or user privilege level, according to the value of the SUPV bit in the
TPUMCR.
T2CLK
PINS
SERVICE REQUESTS
DATA
TCR1
TCR2
MICROENGINE
CONTROL
STORE
EXECUTION
UNIT
I M B
PARAMETER
RAM
CHANNEL
CONTROL
DEVELOPMENT
SUPPORT AND TEST
SYSTEM
CONFIGURATION
SCHEDULER
CONTROL AND DATA
CONTROL
TIMER
CHANNELS
CHANNEL 0
CHANNEL 1
CHANNEL 15
CHANNEL
DATA
TPU BLOCK
HOST
INTERFACE
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MC68334MFC20 32-BIT, 20 MHz, MICROCONTROLLER, PQFP132
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