C8051F505-IQ Silicon Laboratories Inc, C8051F505-IQ Datasheet - Page 204

• Manufacturer Part Number: C8051F505-IQ
• Description: IC 8051 MCU 32K FLASH 48-QFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F50xr

Specifications of C8051F505-IQ

• Program Memory Type: FLASH
• Program Memory Size: 32KB (32K x 8)
• Package / Case: 48-QFP
• Mfg Application Notes: LIN Bootloader AppNote
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 40
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.25 V
• Data Converters: A/D 32x12b
• 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: 40
• 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: 32-ch x 12-bit
• Package: 48PQFP
• Device Core: 8051
• Family Name: C8051F50x
• Maximum Speed: 50 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1527 - KIT DEV FOR C8051F50X
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1520

C8051F50x/F51x
Table 21.2 includes the configuration values required for the typical system clocks and baud rates:
21.2.4. Baud Rate Calculations—Automatic Mode
If the LIN controller 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 21.3 presents some typical values of system clock and baud rate along with their factors.
204
SYSCLK
22.1184
11.0592
(MHz)
12.25
24.5
25
24
16
12
8
0
0
0
0
0
0
0
0
0
20 K
1
1
1
1
1
0
0
0
0
Table 21.2. Manual Baud Rate Parameters Examples
312
306
300
276
200
306
300
276
200
prescaler
0
0
0
0
0
0
0
0
0
divider
prescaler
divider
19.2 K
=
1
1
1
1
1
0
0
0
0
ln
=
=
325
319
312
288
208
319
312
288
208
24000000
------------------------- -
--------------------------------------------------------------------- -
2
4000000
=
---------------------------------------------
2

prescaler

ln
1
Rev. 1.2
24000000
+
SYSCLK
------------------------ -
Baud (bits/sec)
4000000
1
1
1
1
1
1
1
1
1
1

SYSCLK

9.6 K

20000
1
1
1
1
1
0
0
0
0
+
------- - 1
ln2
1
1


–
325
319
312
288
208
319
312
288
208

=
------- - 1
ln2
20000
1
=
300
1.585
–
3
3
3
3
3
3
3
3
3

4.8 K
1
1
1
1
1
0
0
0
0
1
325
319
312
288
208
319
312
288
208
19
19
19
19
19
19
19
19
19
1 K
1
1
1
1
1
0
0
0
0
312
306
300
276
200
306
300
276
200