MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 224
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MC68HC908LK24
Manufacturer Part Number
MC68HC908LK24
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908LK24.pdf
(465 pages)
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Real Time Clock (RTC)
12.5.5 Timebase Interrupts
12.6 RTC Interrupts
Data Sheet
224
The value in the chronograph data register satisfies the following
equation:
The accuracy of the chronograph counter is ±5ms (max).
In addition to the second, minute, hour, and day periodic interrupts
generated by the clock functions, the divider circuits generates four
periodic clocks, separated into two groups: 2Hz and 4Hz; 8Hz and
16Hz. The TBH bit in the RTC control register 2 (RTCCR2) selects the
group for the timebase interrupts, indicated by TB1F and TB2F flags. A
CPU interrupt request is generated if the corresponding enable bits
(TB1IE and TB2IE) are also set.
The RTC has one alarm interrupt and seven periodic interrupts:
A CPU interrupt request is generated if the corresponding interrupt
enable bits are also set.
Freescale Semiconductor, Inc.
•
•
For More Information On This Product,
Alarm interrupt
Periodic interrupts:
– Second
– Minute
– Hour
– Day
– 1/128 seconds (chronograph)
– Timebase 1 and 2:
1/2 seconds and 1/4 seconds, or
1/8 seconds and 1/16 seconds
Go to: www.freescale.com
(128Hz counter value 25)
------------------------------------------------------------------------------------- -
Real Time Clock (RTC)
32
×
+
MC68HC908LJ24/LK24 — Rev. 2
16
MOTOROLA
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