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M68HC05 Datasheet(PDF) 75 Page - Freescale Semiconductor, Inc

Part # M68HC05
Description  Microcontrollers
PDF  128 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

M68HC05 Datasheet(HTML) 75 Page - Freescale Semiconductor, Inc

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Multifunction Timer
Timer Status and Control Register
MC68HC05J1A — Rev. 3.0
Technical Data
Multifunction Timer
A 15-stage ripple counter is the core of the timer. The value of the first
eight stages is readable at any time from the read-only timer counter
register (TCNTR).
Power-on clears the entire counter chain and begins clocking the
counter. After 4064 cycles, the power-on reset circuit is released,
clearing the counter again and allowing the MCU to come out of reset.
A timer overflow function at the eighth counter stage allows a timer
interrupt every 1024 internal clock cycles.
Address:
$0009
Bit 7
6
54321
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
00
000000
= Unimplemented
Figure 8-3. Timer Counter Register (TCNTR)
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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