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參數資料
型號: MC68HC05P18A
廠商: Motorola, Inc.
英文描述: Low Cost HCMOS Microcontroller(低成本、8位HCMOS微控制器)
中文描述: 低成本HCMOS微控制器(低成本,8位HCMOS微控制器)
文件頁數: 72/130頁
文件大小: 1200K
代理商: MC68HC05P18A
L
G
R
16-Bit Timer
Technical Data
MC68HC05P18A
72
16-Bit Timer
MOTOROLA
8.6 Timer Control Register
The timer control (TCR) shown in
Figure 8-10
and free-running counter
(TMRH, TMRL, ACRH, ACRL) registers are the only registers of the 16-
bit timer affected by reset. The output compare port (TCMP) is forced
low after reset and remains low until OLVL is set and a valid output
compare occurs.
ICIE — Input Capture Interrupt Enable Bit
Bit 7, when set, enables input capture interrupts to the CPU. The
interrupt will occur at the same time bit 7 (ICF) in the TSR register is
set.
OCIE — Output Comapre Interrupt Enable Bit
Bit 6, when set, enables output compare interrupts to the CPU. The
interrupt will occur at the same time bit 6 (OCF) in the TSR register is
set.
TOIE — Timer Overflow Interrupt Enable Bit
Bit 5, when set, enables timer overflow (rollover) interrupts to the
CPU. The interrupt will occur at the same time bit 5 (TOF) in the TSR
register is set.
IEDG — Input Capture Edge Select Bit
Bit 1 selects which edge of the input capture signal will trigger a
transfer of the contents of the free-running counter registers to the
input capture registers. Clearing this bit will select the falling edge,
setting it selects the rising edge.
Address:
$0012
Bit 7
6
5
4
3
2
1
Bit 0
Read:
ICIE
OCIE
TOIE
0
0
0
IEDG
OLVL
Write:
Reset:
0
0
0
0
0
0
U
0
= Unimplemented
U = Unaffected
Figure 8-10. Timer Control Register (TCR)
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