C8051F800DK Silicon Laboratories Inc, C8051F800DK Datasheet - Page 231

• Manufacturer Part Number: C8051F800DK
• Description: KIT DEV C8051F800
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F800DK

• Contents: Board, Cables, CD, Debugger, Power Supply
• Processor To Be Evaluated: C8051F800
• Data Bus Width: 16 bit
• Interface Type: USB
• Operating Supply Voltage: 7 V to 15 V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F8xx
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 336-1797

29.3.3. High-Speed Output Mode
In high-speed output mode, a module’s associated CEXn pin is toggled each time a match occurs between
the PCA Counter and the module's 16-bit capture/compare register (PCA0CPHn and PCA0CPLn). When a
match occurs, the Capture/Compare Flag (CCFn) in PCA0CN is set to logic 1. An interrupt request is gen-
erated if the CCFn interrupt for that module is enabled. The CCFn bit is not automatically cleared by hard-
ware when the CPU vectors to the interrupt service routine, and must be cleared by software. Setting the
TOGn, MATn, and ECOMn bits in the PCA0CPMn register enables the high-speed output mode. If ECOMn
is cleared, the associated pin will retain its state, and not toggle on the next match event.
Important Note About Capture/Compare Registers: When writing a 16-bit value to the PCA0 Cap-
ture/Compare registers, the low byte should always be written first. Writing to PCA0CPLn clears the
ECOMn bit to 0; writing to PCA0CPHn sets ECOMn to 1.
PCA0CPLn
Write to
Reset
PCA0CPHn
Write to
0
ENB
ENB
1
PCA
Timebase
Figure 29.6. PCA High-Speed Output Mode Diagram
Enable
P
W
M
1
6
n
x
C
O
M
E
n
PCA0CPLn
PCA0CPMn
C
A
P
P
n
0 0
PCA0L
C
A
P
N
n
16-bit Comparator
M
A
T
n
O
G
T
n
W
M
P
n
0 x
E
C
C
F
n
PCA0CPHn
PCA0H
Rev. 1.0
Match
Toggle
C
F
C
R
TOGn
0
1
PCA0CN
C8051F80x-83x
0
1
CEXn
C
C
F
2
C
C
F
1
C
C
F
0
PCA Interrupt
Crossbar
Port I/O
231