Z16F2800100ZCOG Zilog, Z16F2800100ZCOG Datasheet - Page 257
![DEV KIT FOR Z16F ZNEO](/photos/9/22/92258/z16f2800100zcog_sml.jpg)
Z16F2800100ZCOG
Manufacturer Part Number
Z16F2800100ZCOG
Description
DEV KIT FOR Z16F ZNEO
Manufacturer
Zilog
Series
ZNEO™r
Type
MCUr
Datasheets
1.Z16F2800100ZCOG.pdf
(2 pages)
2.Z16F2800100ZCOG.pdf
(30 pages)
3.Z16F2800100ZCOG.pdf
(388 pages)
Specifications of Z16F2800100ZCOG
Contents
Evaluation Board, Software and Documentation
For Use With/related Products
Z16F Series
For Use With
269-4661 - KIT ACC ETHERNET SMART CABLE
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
269-4537
- Current page: 257 of 388
- Download datasheet (22Mb)
PS022008-0810
Watchdog Timer Reload Unlock Sequence
Following completion of the Stop Mode Recovery, the ZNEO CPU responds to the system
exception request by fetching the System Exception vector and executing code from the
vector address.
WDT Reset in Normal Operation
If configured to generate a Reset when a time-out occurs, the WDT forces the device into
the Reset state. The WDT status bit in the
more information on Reset and the WDT status bit, see the
ery
value.
WDT Reset in STOP Mode
If enabled in STOP mode and configured to generate a Reset when a time-out occurs and
the device is in STOP mode, the WDT initiates a Stop Mode Recovery. Both the WDT
status bit and the STOP bit in the
following WDT time-out in STOP mode. For detailed information, see
Mode Recovery
Writing the unlock sequence to the Watchdog Timer Reload High (WDTH) register
address unlocks the two Watchdog Timer Reload registers (WDTH, and WDTL) to allow
changes to the time-out period. These Write operations to the WDTH register address pro-
duce no effect on the bits in the WDTH register. The locking mechanism prevents spurious
writes to the reload registers.
The following sequence is required to unlock the Watchdog Timer Reload registers
(WDTH and WDTL) for write access:
1. Write
2. Write
3. Write the appropriate value to the Watchdog Timer reload high register (WDTH).
4. Write the appropriate value to the Watchdog Timer reload low register (WDTL).
All steps of the WDT reload unlock sequence must be written in the order just listed. The
value in the Watchdog Timer Reload registers is loaded into the counter every time a
instruction is executed.
on page 58. Following a Reset sequence, the WDT Counter is initialized with its reset
55H
AAH
to the Watchdog Timer Reload High register (WDTH).
to the Watchdog Timer reload high register (WDTH).
on page 58.
P R E L I M I N A R Y
Reset Status and Control Register
Reset Status and Control Register
Reset and Stop Mode Recov-
Product Specification
ZNEO
register are set to 1
Reset and Stop
Watchdog Timer
is set to 1. For
Z16F Series
WDT
241
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