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): 33/164頁
文件大?。?/td> 1148K
代理商: CTMRM
CTM
REFERENCE
MOTOROLA
2-3
BUS INTERFACE UNIT SUBMODULE (BIUSM)
For More Information On This Product,
Go to: www.freescale.com
2
STOP — Stop enable
The STOP bit, while asserted, activates the FREEZE signal on the SMB regardless of the state of
the FREEZE signal on the IMB. This completely stops the operation of the CTM. Note that some
submodules may validate this signal with internal enable bits. The BIUSM continues to operate to
allow the CPU access to the submodule’s registers. The SMB FREEZE signal remains active until
reset or until the STOP bit is negated by the CPU (via the IMB).
The STOP bit is cleared by reset.
1 (set)
Stops operation of the CTM.
0 (clear) –
Allows operation of the CTM.
FRZ — Freeze enable
The FRZ bit, while asserted, activates the FREEZE signal on the SMB when the FREEZE signal
on the IMB is active. This completely stops the operation of the CTM. Note that some submodules
may validate this signal with internal enable bits. The BIUSM continues to operate to allow the CPU
access to the submodule’s registers. The SMB FREEZE signal remains active until the FRZ bit is
cleared or the IMB FREEZE signal is negated.
The FRZ bit is cleared by reset.
1 (set)
Halts the CTM sub module when the FREEZE signal appears on the IMB.
0 (clear) –
Ignores the FREEZE signal on the IMB.
VECT7, VECT6 — Interrupt vector base number bits
The interrupt vector base number bits select the interrupt vector base number for the CTM. Of the
8 bits necessary for vector number definition, the six least significant bits are programmed by
hardware on a submodule basis, while the two remaining bits are provided by VECT7 and VECT6.
This places the CTM vectors in one of four possible positions in the interrupt vector table, as
follows.
Note:
The reader should refer also to Section 3.4 and to the relevant CPU reference manuals
for more detailed information on interrupt vector tables.
VECT7
VECT6
Resulting vector
base number
$00
$40
$80
$C0
0
0
1
1
0
1
0
1
F
.
Freescale Semiconductor, Inc.
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