MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 227

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

12.8 RTC Register and Bit Write Protection
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
A write-protect mechanism is implemented to prevent accidental writes
to the RTC clock registers, calendar registers, and other control bits. The
protected RTC registers and bits are listed in
(CGMXCLK
Freescale Semiconductor, Inc.
UNCOMPENSATED
COMPENSATED
For More Information On This Product,
1-Hz CLOCK
1-Hz CLOCK
CGMXCLK
Table 12-3. Write-Protected RTC Registers and Bits
÷
32768)
RTC Control Register 1
RTC Control Register 2
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Day-Of-Week Register
Real Time Clock (RTC)
Figure 12-4. 1-Hz Clock Compensation
Second Register
Minute Register
Month Register
Hour Register
Year Register
Day Register
Register
1-Hz CLOCK = CGMXCLK
PERIOD A
TRUE 15 SECONDS
÷
A
RTC Register and Bit Write Protection
1-Hz CLOCK = CGMXCLK
AUTOCAL
OUTF[1:0]
Table
PERIOD B
COMEN
(All Bits)
(All Bits)
(All Bits)
(All Bits)
(All Bits)
(All Bits)
(All Bits)
RTCE
CAL
Bit
Real Time Clock (RTC)
12-3.
÷
B
Data Sheet
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