C8051F560-TB Silicon Laboratories Inc, C8051F560-TB Datasheet - Page 193
![BOARD PROTOTYPE W/C8051F560](/photos/9/25/92557/c8051f560-tb_sml.jpg)
C8051F560-TB
Manufacturer Part Number
C8051F560-TB
Description
BOARD PROTOTYPE W/C8051F560
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.TOOLSTICK560DC.pdf
(302 pages)
Specifications of C8051F560-TB
Contents
Board
Processor To Be Evaluated
C8051F56x
Processor Series
C8051F56x
Interface Type
USB
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
1.8 V to 5.25 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F55x, C8051F56x, C8051F57x
For Use With
336-1691 - KIT DEVELOPMENT FOR C8051F560
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1694
- Current page: 193 of 302
- Download datasheet (3Mb)
In all of 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 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:
The following code programs the interface in Master mode, using the Enhanced Checksum and enables
the interface to operate at 19230 bits/sec using a 24 MHz system clock.
Table 20.2 includes the configuration values required for the typical system clocks and baud rates:
LIN0CF
LIN0CF
LIN0ADR
// Initialize the register (prescaler, multiplier and bit 8 of divider)
LIN0DAT
LIN0ADR
LIN0DAT
LIN0ADR
LIN0DAT
LIN0ADR
LIN0DAT
|= 0x40;
= 0x80;
= 0x0D;
= ( 0x01 << 6 ) + ( 0x00 << 1 ) + ( ( 0x138 & 0x0100 ) >> 8 );
|= 0x80;
= 0x0C;
= (unsigned char)_0x138;
= 0x0B;
= 0x08;
= 0x0C;
prescaler
divider
prescaler
divider
baud_rate
=
=
------------------------------------------------------------------------------------------------------------------------------------- -
2
=
multiplier
=
ln
prescaler
ln
---------------------------------------------------------------------- -
2
------------------------------------------------------------------------------------------------
-----------------------------------------------------------
multiplier
multiplier
1
0
=
+
+
--------------------------------------------------------------- -
2
1
1
1
24000000
24000000
=
+
+
1
20000
--------------- - 1
19200
1
19200
0
24000000
Rev. 1.1
+
=
+
SYSCLK
1
----------------------------- 1
baud_rate
// Activate the interface
// Set the node as a Master
// Point to the LIN0MUL register
// Point to the LIN0DIV register
// Initialize LIN0DIV
// Point to the LIN0SIZE register
// Initialize the checksum as Enhanced
// Point to LIN0CTRL register
// Reset any error and the interrupt
1
SYSCLK
0
multiplier
20000
–
+
baud_rate
200
1
19200
=
0.0417
312
------- - 1
ln2
–
C8051F55x/56x/57x
+
1
=
1
312.5
–
19230.77
0
200
baud_rate
=
1.644
312
------- - 1
ln2
1
–
1
193
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