C8051F502-IQ Silicon Laboratories Inc, C8051F502-IQ Datasheet - Page 294
![IC 8051 MCU 64K FLASH 32-QFP](/photos/12/17/121746/c8051f502-iq_sml.jpg)
C8051F502-IQ
Manufacturer Part Number
C8051F502-IQ
Description
IC 8051 MCU 64K FLASH 32-QFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F50xr
Datasheets
1.C8051F507-IM.pdf
(312 pages)
2.C8051F502-IM.pdf
(1 pages)
3.C8051F503-IM.pdf
(312 pages)
Specifications of C8051F502-IQ
Program Memory Type
FLASH
Program Memory Size
64KB (64K x 8)
Package / Case
32-QFP
Mfg Application Notes
LIN Bootloader AppNote
Core Processor
8051
Core Size
8-Bit
Speed
50MHz
Connectivity
SMBus (2-Wire/I²C), CAN, LIN, SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
25
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.25 V
Data Converters
A/D 25x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Processor Series
C8051F5x
Core
8051
Data Bus Width
8 bit
Data Ram Size
4.25 KB
Interface Type
I2C, SPI, UART
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
25
Number Of Timers
4
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F500DK
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 32 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1559 - KIT REF DESIGN CAN DIAGNOSTIC336-1532 - ADAPTER PROG TOOLSTICK F502336-1531 - PLATFORM PROG TOOLSTCK F502336-1528 - DAUGHTER CARD TOOLSTICK F500336-1527 - KIT DEV FOR C8051F50X
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1514
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F502-IQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F502-IQR
Manufacturer:
RUBYCON
Quantity:
20 000
Company:
Part Number:
C8051F502-IQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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C8051F50x-F51x
27.3.5. 8-bit, 9-bit, 10-bit and 11-bit Pulse Width Modulator Modes
Each module can be used independently to generate a pulse width modulated (PWM) output on its associ-
ated CEXn pin. The frequency of the output is dependent on the timebase for the PCA counter/timer, and
the setting of the PWM cycle length (8, 9, 10 or 11-bits). For backwards-compatibility with the 8-bit PWM
mode available on other devices, the 8-bit PWM mode operates slightly different than 9, 10 and 11-bit
PWM modes. It is important to note that all channels configured for 8/9/10/11-bit PWM mode will use
the same cycle length. It is not possible to configure one channel for 8-bit PWM mode and another for 11-
bit mode (for example). However, other PCA channels can be configured to Pin Capture, High-Speed Out-
put, Software Timer, Frequency Output, or 16-bit PWM mode independently.
27.3.5.1. 8-bit Pulse Width Modulator Mode
The duty cycle of the PWM output signal in 8-bit PWM mode is varied using the module's PCA0CPLn cap-
ture/compare register. When the value in the low byte of the PCA counter/timer (PCA0L) is equal to the
value in PCA0CPLn, the output on the CEXn pin will be set. When the count value in PCA0L overflows, the
CEXn output will be reset (see Figure 27.8). Also, when the counter/timer low byte (PCA0L) overflows from
0xFF to 0x00, PCA0CPLn is reloaded automatically with the value stored in the module’s capture/compare
high byte (PCA0CPHn) without software intervention. Setting the ECOMn and PWMn bits in the
PCA0CPMn register, and setting the CLSEL bits in register PCA0PWM to 00b enables 8-Bit Pulse Width
Modulator mode. If the MATn bit is set to 1, the CCFn flag for the module will be set each time an 8-bit
comparator match (rising edge) occurs. The COVF flag in PCA0PWM can be used to detect the overflow
(falling edge), which will occur every 256 PCA clock cycles. The duty cycle for 8-Bit PWM Mode is given in
Equation 27.2.
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.
Using Equation 27.2, the largest duty cycle is 100% (PCA0CPHn = 0), and the smallest duty cycle is
0.39% (PCA0CPHn = 0xFF). A 0% duty cycle may be generated by clearing the ECOMn bit to 0.
294
PCA0CPLn
Write to
Reset
PCA0CPHn
Write to
0
ENB
ENB
1
W
M
P
1
6
n
x
E
C
O
M
n
Figure 27.7. PCA Frequency Output Mode
PCA0CPMn
C
A
P
P
n
0 0 0
C
A
P
N
n
Equation 27.2. 8-Bit PWM Duty Cycle
M
A
T
n
O
G
T
n
W
M
P
n
Duty Cycle
E
C
C
F
n
x
PCA Timebase
Enable
=
Rev. 1.1
Comparator
PCA0CPLn
------------------------------------------------------ -
256 PCA0CPHn
PCA0L
8-bit
–
256
match
Enable
Adder
8-bit Adder
Toggle
TOGn
0
1
CEXn
PCA0CPHn
Crossbar
Port I/O
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