mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 392

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

HME — Halt Monitor Enable
BME — Bus Monitor External Enable
BMT[1:0] — Bus Monitor Timing
D-14
MOTOROLA
The following equation calculates the timeout period for a slow reference frequency,
where f
The following equation calculates the timeout period for a fast reference frequency.
The following equation calculates the timeout period for an externally input clock
frequency on both slow and fast reference frequency devices, when f
system clock frequency.
This field selects the bus monitor timeout period. Refer to Table D-7.
0 = Halt monitor is disabled.
1 = Halt monitor is enabled.
0 = Disable bus monitor for external bus cycles.
1 = Enable bus monitor for external bus cycles.
ref
Timeout Period
is equal to the EXTAL crystal frequency.
Timeout Period
Timeout Period
SWP
0
0
0
0
1
1
1
1
Table D-6 Software Watchdog Divide Ratio
Freescale Semiconductor, Inc.
For More Information On This Product,
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128 Divide Ratio Specified by SWP and SWT[1:0]
=
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Go to: www.freescale.com
Divide Ratio Specified by SWP and SWT[1:0]
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Divide Ratio Specified by SWP and SWT[1:0]
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REGISTER SUMMARY
SWT[1:0]
00
01
10
11
00
01
10
11
f
f
f
sys
ref
ref
Divide Ratio
2
2
2
2
2
2
2
2
11
13
15
18
20
22
24
9
MC68HC16Y3/916Y3
sys
USER’S MANUAL
is equal to the