參數(shù)資料
型號： 68HC05M68HC
廠商： Motorola, Inc.
英文描述： HCMOS Microcontroller Unit
中文描述： HCMOS微控制器
文件頁數(shù)： 73/130頁
文件大?。?/td> 1541K
代理商： 68HC05M68HC
Capture/Compare Timer
Timer I/O Registers
MC68HC705P6A
—
Rev. 2.0
Advance Information
MOTOROLA
Capture/Compare Timer
73
8.4.5 Input Capture Registers
When a selected edge occurs on the TCAP pin, the current high and low
bytes of the 16-bit counter are latched into the input capture registers.
Reading ICRH before reading ICRL inhibits further capture until ICRL is
read. Reading ICRL after reading the status register clears the input
capture flag (ICF). Writing to the input capture registers has no effect.
NOTE:
To prevent interrupts from occurring between readings of ICRH and
ICRL, set the interrupt flag in the condition code register before reading
ICRH, and clear the flag after reading ICRL.
Address:
ICRH
—
$0014
Bit 7
6
5
4
3
2
1
Bit 0
Read:
ICRH7
ICRH6
ICRH5
ICRH4
ICRH3
ICRH2
ICRH1
ICRH0
Write:
Unaffected by reset
Address:
ICRL
—
$0015
Bit 7
6
5
4
3
2
1
Bit 0
Write:
Unaffected by reset
= Unimplemented
Figure 8-6. Input Capture Registers (ICRH and ICRL)
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