參數(shù)資料
型號: CTMRM
英文描述: Configurable Timer Module Reference Manual
中文描述: 配置定時器模塊參考手冊
文件頁數(shù): 22/164頁
文件大小: 1148K
代理商: CTMRM
MOTOROLA
1-2
CTM
REFERENCE
FUNCTIONAL OVERVIEW
For More Information On This Product,
Go to: www.freescale.com
1
1.2
CTM description
The highly modular architecture of the CTM is illustrated in Figure 1-1. Submodules are located
on either side of the CTM’s internal submodule bus (SMB). All data and control signals within the
CTM are passed over this bus. The SMB is connected to the outside world via a special CTM
submodule, known as the bus interface unit submodule (BIUSM), which is connected to the
intermodule bus (IMB) and hence to the main CPU. This configuration allows the CPU to access
the data and control registers in each CTM submodule on the SMB.
Four local time base buses (TBB1 – TBB4) are arranged in such a way that each CTM submodule
can be connected to two of them. As can be seen in Figure 1-1, CTM submodules numbered 1 to
M-1 can be connected to TBB3 and TBB4 and CTM submodules M to N can be connected to TBB1
and TBB2. Control bits within each CTM submodule allow the software to connect the submodule
to the desired time base bus(es). During the design of the CTM module, the four local time base
Figure 1-1
CTM architecture block diagram
Submodule M
Bus interface unit submodule (BIUSM)
Intermodule bus (IMB)
T
Time base bus A (TBBA)
T
T
S
Submodule N
Submodule M+1
Submodule M-1
Submodule 1
Submodule 2
Time base bus B (TBBB)
T
F
.
Freescale Semiconductor, Inc.
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