C8051F537-IM Silicon Laboratories Inc, C8051F537-IM Datasheet - Page 200
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C8051F537-IM
Manufacturer Part Number
C8051F537-IM
Description
IC 8051 MCU 2K FLASH 20QFN
Manufacturer
Silicon Laboratories Inc
Series
C8051F53xr
Specifications of C8051F537-IM
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
16
Program Memory Size
2KB (2K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.25 V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
20-QFN
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SPI, UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
16
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.25 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 16 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Other names
336-1400
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F537-IM
Manufacturer:
Silicon Labs
Quantity:
135
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C8051F52x/F52xA/F53x/F53xA
19.2.4. 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 19.1.
Where F
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. Fre-
quency Output Mode is enabled by setting the ECOMn, TOGn, and PWMn bits in the PCA0CPMn register.
200
Note: A value of 0x00 in the PCA0CPHn register is equal to 256 for this equation.
W
M
P
1
6
n
0
PCA0CPMn
O
M
E
C
n
C
A
P
P
n
0 0 0
C
A
P
N
n
PCA
M
A
T
n
O
G
T
n
1
W
M
P
n
is the frequency of the clock selected by the CPS2-0 bits in the PCA mode register, PCA0MD.
E
C
C
F
n
0
PCA Timebase
Enable
Equation 19.1. Square Wave Frequency Output
Figure 19.7. PCA Frequency Output Mode
Comparator
PCA0CPLn
PCA0L
8-bit
F
CEXn
=
Rev. 1.3
---------------------------------------- -
2
match
Enable
Adder
PCA0CPHn
8-bit Adder
F
Toggle
PCA
TOGn
0
1
CEXn
PCA0CPHn
Crossbar
Port I/O
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