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MC68HC705P9CS Datasheet(PDF) 114 Page - Freescale Semiconductor, Inc

Part # MC68HC705P9CS
Description  Microcontrollers
PDF  160 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC68HC705P9CS Datasheet(HTML) 114 Page - Freescale Semiconductor, Inc

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Timer
Technical Data
MC68HC705P9 — Rev. 4.0
114
Timer
MOTOROLA
9.7.5 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 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
6
54321
Bit 0
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
Unaffected by reset
$0015
7
6
543210
Read:
Bit 7
6
5
4
3
2
1
Bit 0
Write:
Reset:
Unaffected by reset
= Unimplemented
Figure 9-16. Input Capture Registers (ICRH and ICRL)
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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