Motorola DragonBall MC9328MX1 Reference Manual page 596

Real-Time Clock (RTC)
Table 23-11. RTC Interrupt Enable Register Description (Continued)
Name
SAM1 Sampling Timer Interrupt Flag at SAM1 Interrupt
Bit 9 Enable—Enables/Disables the real-time sampling timer interrupt 1.
The frequency of this interrupt is shown in Table 23-1.
SAM0 Sampling Timer Interrupt Flag at SAM0 Interrupt
Bit 8 Enable—Enables/Disables the real-time sampling timer interrupt 0.
The frequency of this interrupt is shown in Table 23-1.
2HZ 2 Hz Interrupt Enable—Enables/Disables the 2 Hz bit at a 2 Hz
Bit 7 rate.
Reserved Reserved—This bit is reserved and should read 0.
Bit 6
HR Hour Interrupt Enable—Enables/Disables an interrupt whenever
Bit 5 the hour counter of the real-time clock increments.
1HZ 1 Hz Interrupt Enable—Enables/Disables an interrupt whenever
Bit 4 the second counter of the real-time clock increments.
DAY Day Interrupt Enable—Enables/Disables an interrupt whenever
Bit 3 the hours counter rolls over from 23 to 0 (midnight rollover).
ALM Alarm Interrupt Enable—Enables/Disables the alarm interrupt.
Bit 2
MIN Minute Interrupt Enable—Enables/Disables an interrupt whenever
Bit 1 the minute counter of the real-time clock increments.
SW Stopwatch Interrupt Enable—Enables/Disables the stopwatch
Bit 0 interrupt.
Note: The stopwatch counts down and remains at decimal -1 until
it is reprogrammed. If this bit is enabled with -1 (decimal) in the
STPWCH register, an interrupt will be posted on the next minute
tick.
23-14
Description
MC9328MX1 Reference Manual
Settings
0 = SAM1 interrupt is disabled
1 = SAM1 interrupt is enabled
0 = SAM0 interrupt is disabled
1 = SAM0 interrupt is enabled
0 = The 2 Hz clock is disabled
1 = The 2 Hz clock is enabled
0 = The 1-hour interrupt is
disabled
1 = The 1-hour interrupt is
enabled
0 = The 1 Hz interrupt is
disabled
1 = The 1 Hz interrupt is
enabled
0 = The 24-hour interrupt is
disabled
1 = The 24-hour interrupt is
enabled
0 = The alarm interrupt is
disabled
1 = The alarm interrupt is
enabled
0 = The 1-minute interrupt is
disabled
1 = The 1-minute interrupt is
enabled
0 = Stopwatch interrupt is
disabled
1 = Stopwatch interrupt is
enabled
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