参数资料
型号: MC68HC05P9AMDW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 3/158页
文件大小: 3885K
代理商: MC68HC05P9AMDW
Timer
100
Timer
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 read-only input capture
registers (ICRH and ICRL). Reading ICRH before reading ICRL inhibits
further captures until ICRL is read. Reading ICRL after reading the timer
status register clears the input capture flag (ICF). Writing to the input
capture registers has no effect.
NOTE:
To prevent interrupts between readings of ICRH and ICRL, set the
interrupt mask (I bit) in the condition code register before reading ICRH,
and clear the mask after reading ICRL.
$0014
Bit 7
654321
Bit 0
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
Unaffected by reset
$0015
76543210
Read:
Bit 7
6
5
4
3
2
1
Bit 0
Write:
Reset:
Unaffected by reset
= Unimplemented
Figure 57. Input Capture Registers (ICRH and ICRL)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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