C8051F320-TB Silicon Laboratories Inc, C8051F320-TB Datasheet - Page 237
![no-image](/images/manufacturer_photos/0/6/609/silicon_laboratories_inc_sml.jpg)
C8051F320-TB
Manufacturer Part Number
C8051F320-TB
Description
BOARD PROTOTYPING W/C8051F320
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F320-TB
Contents
Board
Processor To Be Evaluated
C8051F320/F321
Interface Type
USB
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F320
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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20.3.1. Watchdog Timer Operation
While the WDT is enabled:
•
•
•
•
•
•
While the WDT is enabled, writes to the CR bit will not change the PCA counter state; the counter will run
until the WDT is disabled. The PCA counter run control (CR) will read zero if the WDT is enabled but user
software has not enabled the PCA counter. If a match occurs between PCA0CPH4 and PCA0H while the
WDT is enabled, a reset will be generated. To prevent a WDT reset, the WDT may be updated with a write
of any value to PCA0CPH4. Upon a PCA0CPH4 write, PCA0H plus the offset held in PCA0CPL4 is loaded
into PCA0CPH4 (See Figure 20.10).
PCA counter is forced on.
Writes to PCA0L and PCA0H are not allowed.
PCA clock source bits (CPS2-CPS0) are frozen.
PCA Idle control bit (CIDL) is frozen.
Module 4 is forced into Watchdog Timer mode.
Writes to the Module 4 mode register (PCA0CPM4) are disabled.
PCA0CPL4
C
D
L
I
Figure 20.10. PCA Module 4 with Watchdog Timer Enabled
W
D
E
T
PCA0MD
W
D
C
K
L
PCA0CPH4
C
P
S
2
Write to
C
P
S
1
C
P
S
0
E
C
F
8-bit Adder
Enable
Adder
Enable
Rev. 1.4
PCA0CPH4
Comparator
PCA0H
8-bit
Match
PCA0L Overflow
C8051F320/1
Reset
237
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