mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 186

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Clock Functions
RTIFLG — Real Time Interrupt Flag Register
Technical Data
186
RTR2 RTR1 RTR0 Divide X By:
RESET:
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
RTIF
Bit 7
0
0
1
0
1
0
1
0
1
6
0
0
RTBYP — Real Time Interrupt Divider Chain Bypass
RTR2, RTR1, RTR0 — Real-Time Interrupt Rate Select
RTIF — Real Time Interrupt Flag
OFF
2
2
2
2
2
2
2
13
14
15
16
17
18
19
Freescale Semiconductor, Inc.
Write not allowed in normal modes, anytime in special modes. Read
anytime.
Read and write anytime.
Rate select for real-time interrupt. The clock used for this module is
the XCLK.
This bit is cleared automatically by a write to this register with this bit
set.
Table 11-4. Real Time Interrupt Rates
For More Information On This Product,
0 = Divider chain functions normally.
1 = Divider chain is bypassed, allows faster testing (the divider
0 = Time-out has not yet occurred.
1 = Set when the time-out period is met.
Time-Out Period
5
0
0
chain is normally XCLK divided by 2
becomes XCLK divided by 4).
X = 125 KHz
65.536 ms
131.72 ms
263.44 ms
526.88 ms
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1.05 s
4.22 s
2.11 s
OFF
Clock Functions
4
0
0
Time-Out Period
X = 500 KHz
16.384 ms
32.768 ms
65.536 ms
131.72 ms
263.44 ms
526.88 ms
3
0
0
1.05 s
OFF
2
0
0
Time-Out Period
X = 2.0 MHz
16.384 ms
32.768 ms
65.536 ms
131.72 ms
263.44 ms
4.096 ms
8.196 ms
MC68HC912DG128 — Rev 3.0
13
OFF
1
0
0
, when bypassed
Bit 0
Time-Out Period
0
0
X = 8.0 MHz
16.384 ms
32.768 ms
65.536 ms
1.024 ms
2.048 ms
4.096 ms
8.196 ms
MOTOROLA
OFF
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