參數(shù)資料
型號: MC68HC05P9ACP
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 3/158頁
文件大?。?/td> 3885K
代理商: MC68HC05P9ACP
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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