參數(shù)資料
型號(hào): TS68HC901
廠商: 意法半導(dǎo)體
英文描述: HCMOS Multi-Function Peripheral(HCMOS多功能外圍)
中文描述: HCMOS多功能外設(shè)(HCMOS多功能外圍)
文件頁(yè)數(shù): 21/42頁(yè)
文件大?。?/td> 368K
代理商: TS68HC901
7
TIMER A CONTROL REGISTER
0
TACR
(19h)
0*
0*
0*
TA0
RESET
AC3
AC2
AC1
AC0
TIMER B CONTROL REGISTER
TBCR
(1Bh)
0*
0*
0*
TB0
RESET
BC3
BC2
BC1
BC0
CLEARED on RESET
0*
Unused bits,read as zero.
RESET
TA0/TB0
Timer’s A and B output lines (TA0 and TB0) may be forced low at anytime by writing a one
to the reset location in TACR and TBCR, respectively. Theoutput will be held low only during
the write operation ; at theconclusion of theoperation the output will be allowed to togglein
response to a time-out pulse. When resetting TA0 and TB0, the remaining bits inthecontrol
register must be written with their previous value to avoid altering the operation mode.
SET: End of write cycle which clears the bit
CLEARED:MPUwrites a zero
AC3-AC0
BC3-BC0
These bits are decoded to determine the timer operation mode.
AC3
BC3
AC2
BC2
AC1
BC1
AC0
BC0
Operation Mode
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Timer Stopped*
Delay Mode,
÷
4 Prescaler
Delay Mode,
÷
10 Prescaler
Delay Mode,
÷
16 Prescaler
Delay Mode,
÷
50 Prescaler
Delay Mode,
÷
64 Prescaler
Delay Mode,
÷
100 Prescaler
Delay Mode,
÷
200 Prescaler
Event Count Mode
Pulse Width Mode,
÷
4 Prescaler
Pulse Width Mode,
÷
10 Prescaler
Pulse Width Mode,
÷
16 Prescaler
Pulse Width Mode,
÷
50 Prescaler
Pulse Width Mode,
÷
64 Prescaler
Pulse Width Mode,
÷
100 Prescaler
Pulse Width Mode,
÷
200 Prescaler
* Regardless of the operation mode, counting is inhibited when the timer is stopped. The
contents of the timer’s main counter is not affected, although any residual count in the
prescaler is lost.
SET: End of write cycle which clears the bit
CLEARED: MPUwrites a zero
Figure 14 :
TS68HC901
21/42
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