C8051F526-IMR Silicon Labs, C8051F526-IMR Datasheet - Page 166

• Manufacturer Part Number: C8051F526-IMR
• Description: 8-bit Microcontrollers - MCU 2KB 12ADC 125C LIN 10Pin MCU
• Manufacturer: Silicon Labs

Specifications of C8051F526-IMR

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 2 KB
• Data Ram Size: 256 B
• On-chip Adc: Yes
• Package / Case: DFN-10
• Mounting Style: SMD/SMT
• A/d Bit Size: 12 bit
• A/d Channels Available: 6
• Interface Type: SPI, UART
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 6
• Number Of Timers: 3
• On-chip Dac: No
• Processor Series: C8051
• Program Memory Type: Flash
• Factory Pack Quantity: 1500
• Supply Voltage - Max: 2.7 V, 5.25 V
• Supply Voltage - Min: 2 V, 2.7 V

C8051F52x/F53x
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:
166
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
+
=
+
1

------------------------------------------------------ -
2
1


24500000
+
24500000

1
=

1

+
0

1
20000
-------------- - 1
19200
19200 200

+

Rev. 1.4
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
–