C8051F330-TB Silicon Laboratories Inc, C8051F330-TB Datasheet - Page 198
C8051F330-TB
Manufacturer Part Number
C8051F330-TB
Description
BOARD PROTOTYPING W/C8051F330
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F330-TB
Contents
Board
Processor To Be Evaluated
C8051F33x
Interface Type
RS-232, UART
Operating Supply Voltage
7 V to 15 V
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F330
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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C8051F330/1/2/3/4/5
19.3.1. 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 PCA0CPH2 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 PCA0CPH2. Upon a PCA0CPH2 write, PCA0H plus the offset held in PCA0CPL2 is loaded
into PCA0CPH2 (See Figure 19.10).
202
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 2 is forced into software timer mode.
Writes to the Module 2 mode register (PCA0CPM2) are disabled.
PCA0CPL2
C
D
L
I
Figure 19.10. PCA Module 2 with Watchdog Timer Enabled
W
D
T
E
PCA0MD
W
D
C
L
K
PCA0CPH2
C
P
S
2
Write to
C
P
S
1
C
P
S
0
E
C
F
8-bit Adder
Enable
Adder
Enable
Rev. 1.7
PCA0CPH2
Comparator
PCA0H
8-bit
Match
PCA0L Overflow
Reset
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