MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 239

• Manufacturer Part Number: MC68HC908LK24
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
NOTE:
NOTE:
TB1F — Timebase 1 Flag
Timebase 1 is not synchronized to the compensated RTC 1-Hz clock.
Hence, time intervals for timebase ticks may not align with the RTC clock
and calendar register updates.
TB2F — Timebase 2 Flag
Timebase 2 is not synchronized to the compensated RTC 1-Hz clock.
Hence, time intervals for timebase ticks may not align with the RTC clock
and calendar register updates.
This clearable, read-only bit is set on every tick of the timebase 1
counter (every 0.5 or 0.125 seconds). When the TB1IE bit in RTCCR1
is set, TB1F generates a CPU interrupt request. In normal operation,
clear the TB1F bit by reading RTCSR with TB1F set and then reading
the chronograph data register (CHRR). Reset clears TB1F.
This clearable, read-only bit is set on every tick of the timebase 2
counter (every 0.25 or 0.0625 seconds). When the TB2IE bit in
RTCCR1 is set, TB2F generates a CPU interrupt request. In normal
operation, clear the TB2F bit by reading RTCSR with TB2F set and
then reading the chronograph register (CHRR). Reset clears TB2F.
Freescale Semiconductor, Inc.
For More Information On This Product,
1 = A timebase 1 tick has occurred
0 = No timebase 1 tick has occurred
1 = A timebase 2 tick has occurred
0 = No timebase 2 tick has occurred
Go to: www.freescale.com
Real Time Clock (RTC)
Real Time Clock (RTC)
RTC Registers
Data Sheet
239