MC34911G5AC Freescale, MC34911G5AC Datasheet - Page 44
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MC34911G5AC
Manufacturer Part Number
MC34911G5AC
Description
Manufacturer
Freescale
Datasheet
1.MC34911G5AC.pdf
(92 pages)
Specifications of MC34911G5AC
Turn Off Delay Time
10us
Number Of Drivers
2
Operating Temperature (min)
-40C
Lead Free Status / RoHS Status
Compliant
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CS/WD - Cyclic Sense or Watchdog prescaler select
to the Cyclic Sense/Forced Wake-up prescaler or the
Watchdog prescaler.
WDx - Watchdog Prescaler
prescaler and therefore selects the watchdog period in
accordance with
windowing watchdog is active.
Table 24. Watchdog Prescaler
CYSTx - Cyclic Sense Period Prescaler Select
cyclic sensing together with the bit CYSX8 in the
Configuration Register (CFR) (see
CFR on page
when entering in Stop or Sleep mode. Otherwise a timed
wake-up is performed after the period shown in
44
33911
FUNCTIONAL DEVICE OPERATIONS
LOGIC COMMANDS AND REGISTERS
WD2
This write-only bit selects which prescaler is being written
1 = Cyclic Sense/Forced Wake-up Prescaler selected
0 = Watchdog Prescaler select
This write-only bits selects the divider for the watchdog
This write-only bits selects the interval for the wake-up
This option is only active if the high side switch is enabled
Table 23. Timing Control Register - $A
0
0
0
0
1
1
1
1
Condition
Reset
Value
Reset
Write
WD1
0
0
1
1
0
0
1
1
45).
CS/WD
Table
C3
-
-
WD0
0
1
0
1
0
1
0
1
24. This configuration is valid only if
CYST2
WD2
C2
0
Configuration Register -
Prescaler Divider
CYST1
WD1
POR
C1
0
10
12
14
1
2
4
6
8
Table
CYST0
WD0
C0
0
25.
Table 25. Cyclic Sense and Force Wake-up Interval
Watchdog Status Register - WDSR
is also returned when writing to the TIMCR.
WDTO - Watchdog Timeout
either a watchdog timeout or by an attempt to clear the
Watchdog within the window closed.
(TIMCR) will clear the WDTO bit.
WDERR - Watchdog Error
watchdog resistor. In this condition the watchdog is using the
internal, lower precision timebase. The Windowing function is
disabled.
Notes
CYSX8
67.
68.
This register returns the Watchdog status information and
This read-only bit signals the last reset was caused by
Any access to this register or the Timing Control Register
1 = Last reset caused by watchdog timeout
0 = None
This read-only bit signals the detection of a missing
1 = WDCONF pin resistor missing
0 = WDCONF pin resistor not floating
X
0
0
0
0
0
0
0
1
1
1
1
1
1
1
(67)
bit CYSX8 is located in Configuration Register (CFR)
No Cyclic Sense and no Force Wake up available.
Table 26. Watchdog Status Register - $A/$B
Read
CYST2
0
0
0
0
1
1
1
1
0
0
0
1
1
1
1
WDTO
S3
CYST1
Analog Integrated Circuit Device Data
0
0
1
1
0
0
1
1
0
1
1
0
0
1
1
WDERR
S2
CYST0
Freescale Semiconductor
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
WDOFF
S1
No cyclic sense
WDWO
1120 ms
Interval
S0
100 ms
120 ms
140 ms
160 ms
320 ms
480 ms
640 ms
800 ms
960 ms
20 ms
40 ms
60 ms
80 ms
(68)