C8051T610DB28 Silicon Laboratories Inc, C8051T610DB28 Datasheet - Page 197

• Manufacturer Part Number: C8051T610DB28
• Description: DAUGHTER BOARD T610 28QFN SOCKET
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051T610DB28

• Module/board Type: Socket Module - QFN
• Processor To Be Evaluated: C8051T61x
• Interface Type: USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: C8051T610DK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1506

26.3.4. Frequency Output Mode
Frequency Output Mode produces a programmable-frequency square wave on the module’s associated
CEXn pin. The capture/compare module high byte holds the number of PCA clocks to count before the out-
put is toggled. The frequency of the square wave is then defined by Equation 26.1.
Where F
PCA0MD. The lower byte of the capture/compare module is compared to the PCA counter low byte; on a
match, CEXn is toggled and the offset held in the high byte is added to the matched value in PCA0CPLn.
Frequency Output Mode is enabled by setting the ECOMn, TOGn, and PWMn bits in the PCA0CPMn reg-
ister. Note that the MATn bit should normally be set to 0 in this mode. If the MATn bit is set to 1, the CCFn
flag for the channel will be set when the 16-bit PCA0 counter and the 16-bit capture/compare register for
the channel are equal.
Note: A value of 0x00 in the PCA0CPHn register is equal to 256 for this equation.
PCA0CPLn
Write to
Reset
PCA0CPHn
PCA
Write to
is the frequency of the clock selected by the CPS2–0 bits in the PCA mode register,
0
ENB
ENB
1
Equation 26.1. Square Wave Frequency Output
W
M
P
1
6
n
Figure 26.7. PCA Frequency Output Mode
x
C
O
M
E
n
PCA0CPMn
C
A
P
P
n
0 0 0
C
N
A
P
n
M
A
T
n
O
G
T
n
P
W
M
n
E
C
C
F
n
x
PCA Timebase
F
CEXn
Enable
=
Comparator
PCA0CPLn
---------------------------------------- -
2
Rev 1.0
PCA0L

8-bit
PCA0CPHn
F
C8051T610/1/2/3/4/5/6/7
PCA
match
Enable
Adder
8-bit Adder
Toggle
TOGn
0
1
CEXn
PCA0CPHn
Crossbar
Port I/O
197