C8051F996DK Silicon Laboratories Inc, C8051F996DK Datasheet - Page 302
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C8051F996DK
Manufacturer Part Number
C8051F996DK
Description
KIT DEV FOR C8051F996
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheets
1.C8051F996DK.pdf
(24 pages)
2.C8051F996DK.pdf
(2 pages)
3.C8051F996DK.pdf
(4 pages)
4.C8051F996DK.pdf
(322 pages)
Specifications of C8051F996DK
Contents
Board, Batteries, Cables, CDs, Debug Adapter, Documentation, Power Adapter
Processor To Be Evaluated
C8051F996
Processor Series
C8051F98x
Interface Type
USB
Operating Supply Voltage
3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F996
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1963
- C8051F996DK PDF datasheet
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- Download datasheet (3Mb)
C8051F99x-C8051F98x
26.3.1. Edge-triggered Capture Mode
In this mode, a valid transition on the CEXn pin causes the PCA to capture the value of the PCA
counter/timer and load it into the corresponding module's 16-bit capture/compare register (PCA0CPLn and
PCA0CPHn). The CAPPn and CAPNn bits in the PCA0CPMn register are used to select the type of
transition that triggers the capture: low-to-high transition (positive edge), high-to-low transition (negative
edge), or either transition (positive or negative edge). When a capture occurs, the Capture/Compare Flag
(CCFn) in PCA0CN is set to logic 1. An interrupt request is generated if the CCFn interrupt for that module
is enabled. The CCFn bit is not automatically cleared by hardware when the CPU vectors to the interrupt
service routine, and must be cleared by software. If both CAPPn and CAPNn bits are set to logic 1, then
the state of the Port pin associated with CEXn can be read directly to determine whether a rising-edge or
falling-edge caused the capture.
Note: The CEXn input signal must remain high or low for at least 2 system clock cycles to be recognized by the
302
Port I/O
hardware.
Crossbar
CEXn
Figure 26.4. PCA Capture Mode Diagram
W
M
P
1
6
n
x
PCA0CPMn
C
O
M
E
n
x
C
A
P
P
n
Rev. 1.0
C
N
A
P
n
0
1
M
A
T
n
0 0 0 x
O
G
T
n
P
W
M
n
C
C
E
F
n
0
1
C
F
C
R
PCA0CN
PCA
Timebase
C
C
F
2
C
C
F
1
C
C
F
0
PCA Interrupt
Capture
PCA0CPLn
PCA0L
PCA0CPHn
PCA0H
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