C8051F930-TB Silicon Laboratories Inc, C8051F930-TB Datasheet - Page 307
![BOARD TARGET/PROTO W/C8051F930](/photos/9/25/92560/c8051f930-tb_sml.jpg)
C8051F930-TB
Manufacturer Part Number
C8051F930-TB
Description
BOARD TARGET/PROTO W/C8051F930
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F930-TB
Contents
Board
Processor To Be Evaluated
C8051F930
Processor Series
C8051F9xx
Data Bus Width
8 bit
Interface Type
I2C, UART, SPI
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
0.9 V to 3.6 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F930
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1472
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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
output 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
register. 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
x
C
O
M
E
n
Figure 26.7. PCA Frequency Output Mode
PCA0CPMn
C
A
P
P
n
0 0 0
C
A
P
N
n
M
A
T
n
T
O
G
n
W
P
M
n
C
C
E
F
n
x
PCA Timebase
F
CEXn
Enable
=
Rev. 1.1
---------------------------------------- -
2
Comparator
PCA0CPLn
PCA0L
8-bit
PCA0CPHn
F
C8051F93x-C8051F92x
PCA
match
Enable
Adder
8-bit Adder
Toggle
TOGn
0
1
CEXn
PCA0CPHn
Crossbar
Port I/O
307
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