C8051F523A-IM Silicon Laboratories Inc, C8051F523A-IM Datasheet - Page 165
C8051F523A-IM
Manufacturer Part Number
C8051F523A-IM
Description
IC 8051 MCU 4K FLASH 10DFN
Manufacturer
Silicon Laboratories Inc
Series
C8051F52xr
Specifications of C8051F523A-IM
Program Memory Type
FLASH
Program Memory Size
4KB (4K x 8)
Package / Case
10-DFN
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
LIN, 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
336-1491-5
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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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