C8051F537-IM Silicon Laboratories Inc, C8051F537-IM Datasheet - Page 167

• 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

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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