MC68HC05K1 FREESCALE [Freescale Semiconductor, Inc], MC68HC05K1 Datasheet - Page 81

• Manufacturer Part Number: MC68HC05K1
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

8.4 Timer Counter Register
MC68HC05K0 • MC68HC05K1 — Rev. 2.0
Address:
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 shown in
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.
Each count of the timer counter register takes eight oscillator cycles or
four cycles of the internal clock.
Reset:
Read:
Write:
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TCR7
Bit 7
0
Figure 8-3. Timer Counter Register (TCNTR)
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= Unimplemented
Multifunction Timer
TCR6
Figure
6
0
TCR5
8-3.
5
0
TCR4
4
0
TCR3
3
0
TCR2
2
0
Timer Counter Register
Multifunction Timer
TCR1
1
0
Technical Data
TCR0
Bit 0
0