C8051F537-IM Silicon Laboratories Inc, C8051F537-IM Datasheet - Page 165
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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Important: The minimum system clock (SYSCLK) to operate the LIN peripheral is 8 MHz.
Use the following equations to calculate the values for the variables for the baud-rate equation:
It is important to note that in all these equations, the results must be rounded down to the nearest integer.
The following example shows the steps for calculating the baud rate values for a Master node running at
24.5 MHz and communicating at 19200 bits/sec. First, calculate the multiplier:
Next, calculate the prescaler:
Finally, calculate the divider:
These values lead to the following baud rate:
prescaler
prescaler
divider
divider
Table 17.1. Baud-Rate Calculation Variable Ranges
baud_rate
=
=
multiplier
=
ln
=
------------------------------------------------------------------------------------------------------------------- -
2
ln
prescaler
------------------------------------------------------------ -
2
multiplier
----------------------------------------------------------------------------------------- -
multiplier
prescaler
Factor
divider
multiplier
-----------------------------------------------------
1
0
+
=
+
C8051F52x/F52xA/F53x/F53xA
1
------------------------------------------------------ -
2
1
24500000
+
24500000
1
=
1
+
0
1
20000
-------------- - 1
19200
19200 200
+
Rev. 1.3
24500000
=
+
1
SYSCLK
multiplier
1
-------------------------- - 1
baud_rate
0
baud_rate 200
SYSCLK
+
20000
–
19200
1
200…511
Range
=
0…31
0…3
0.0417 0
319
+
=
------- - 1
ln2
–
1
1
319.010 319
–
19200.63
baud_rate
=
1.674
------- - 1
ln2
1
1
–
165
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