C8051F521A-IM Silicon Laboratories Inc, C8051F521A-IM Datasheet - Page 167

• Manufacturer Part Number: C8051F521A-IM
• Description: IC 8051 MCU 8K FLASH 10DFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F52xr

Specifications of C8051F521A-IM

• Program Memory Type: FLASH
• Program Memory Size: 8KB (8K x 8)
• Package / Case: 10-DFN
• 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: 6
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.25 V
• Data Converters: A/D 6x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Processor Series: C8051F5x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI/UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 3
• 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: 6-ch x 12-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1488 - KIT DEV C8051F53XA, C8051F52XA770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1455 - ADAPTER PROGRAM TOOLSTICK F520
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1490-5

17.2.4. Baud Rate Calculations—Automatic Mode
If the LIN peripheral is configured for slave mode, only the prescaler and divider need to be calculated:
The following example calculates the values of these variables for a 24 MHz system clock:
Table 17.3 presents some typical values of system clock and baud rate along with their factors.
prescaler
Table 17.3. Autobaud Parameters Examples
System Clock (MHz)
divider
prescaler
divider
22.1184
11.0592
12.25
24.5
=
25
24
16
12
=
8
ln
C8051F52x/F52xA/F53x/F53xA
------------------------------------ -
2

1
=
24500000
----------------------- -
24500000
=
4000000
+
1
----------------------------------------------------- -
2
ln


Rev. 1.3
prescaler

SYSCLK
--------------------- -
20000
4000000
SYSCLK
Prescaler

+
------- - 1
ln2
1
1
1
1
1
0
0
0
0
=
1
1


306.25 306

–
20000
------- - 1
ln2
1
=
Divider
–
1.615

312
306
300
276
200
306
300
276
200

1
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