PIC18F2431-I/SP Microchip Technology Inc., PIC18F2431-I/SP Datasheet - Page 228

• Manufacturer Part Number: PIC18F2431-I/SP
• Description: Microcontroller; 16 KB Flash; 768 RAM; 256 EEPROM; 24 I/O; 28-Pin-SPDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2431-I/SP

• A/d Inputs: 5-Channel, 10-Bit
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 24
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 16K Bytes
• Ram Size: 768 Bytes
• Speed: 40 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC18F2331/2431/4331/4431
EXAMPLE 19-1:
TABLE 19-2:
TABLE 19-3:
DS39616B-page 226
TXSTA
RCSTA
BAUDCTL
SPBRGH
SPBRG
Legend:
For a device with F
Desired Baud Rate= F
Solving for SPBRGH:SPBRG:
Calculated Baud Rate=16000000 / (64 (25 + 1))
Error =
BAUD
BAUD
RATE
RATE
115.2
115.2
19.2
57.6
19.2
57.6
Name
(K)
0.3
1.2
2.4
9.6
(K)
0.3
1.2
2.4
9.6
X
125.000
=
=
=
=
=
Actual
19.531
56.818
Actual
20.833
62.500
62.500
2.441
9.615
0.300
1.202
2.404
8.929
x = unknown, – = unimplemented, read as ‘0’. Shaded cells are not used by the BRG.
Rate
Rate
Baud Rate Generator Register, High Byte
Baud Rate Generator Register, Low Byte
(K)
(K)
—
—
CSRC
SPEN
F
Bit 7
F
((Fosc / Desired Baud Rate)/64) – 1
((16000000 / 9600) / 64) – 1
[25.042] = 25
9615
(Calculated Baud Rate – Desired Baud Rate) / Desired Baud Rate
(9615 – 9600) / 9600 = 0.16%
OSC
—
OSC
REGISTERS ASSOCIATED WITH BAUD RATE GENERATOR
BAUD RATES FOR ASYNCHRONOUS MODES
= 40.000 MHz
= 4.000 MHz
-45.75
Error
Error
-1.36
-6.99
1.73
0.16
1.73
8.51
0.16
0.16
0.16
8.51
8.51
%
—
—
%
RCIDL
CALCULATING BAUD RATE ERROR
Bit 6
RX9
TX9
OSC
(decimal)
(decimal)
SPBRG
SPBRG
OSC
value
value
of 16 MHz, desired baud rate of 9600, Asynchronous mode, 8-bit BRG:
255
207
64
31
10
51
25
—
—
4
6
2
0
0
SREN
TXEN
Bit 5
/ (64 ([SPBRGH:SPBRG] + 1))
—
SYNC = 0, BRGH = 0, BRG16 = 0
104.167
Actual
19.531
62.500
Actual
1.221
2.404
9.766
Rate
Rate
1201
2403
300
(K)
(K)
—
—
—
—
—
CREN
F
SYNC
SCKP
F
Bit 4
OSC
OSC
= 20.000 MHz
= 2.000 MHz
Error
Error
-9.58
-0.16
-0.16
-0.16
1.73
0.16
1.73
1.73
8.51
SYNC = 0, BRGH = 0, BRG16 = 0
—
—
—
—
—
%
%
SENDB
ADDEN
BRG16
Preliminary
Bit 3
(decimal)
(decimal)
SPBRG
SPBRG
value
value
255
129
103
—
31
15
25
12
—
—
—
—
4
2
BRGH
FERR
Bit 2
—
Actual
19.531
52.083
78.125
Actual
1.202
2.404
9.766
Rate
Rate
1201
300
(K)
(K)
—
—
—
—
—
—
F
F
OSC
TRMT
OERR
OSC
WUE
Bit 1
= 10.000 MHz
= 1.000 MHz
-32.18
Error
Error
-9.58
-0.16
-0.16
0.16
0.16
1.73
1.73
—
—
—
—
—
—
%
%
ABDEN
RX9D
TX9D
Bit 0
(decimal)
(decimal)
SPBRG
SPBRG
value
value
129
64
15
51
12
—
—
—
—
—
—
7
2
1
 2003 Microchip Technology Inc.
0000 -010
0000 -00x
-1-1 0-00
0000 0000
0000 0000
POR, BOR
Value on
Actual
1201
2403
9615
Rate
(K)
—
—
—
—
F
OSC
= 8.000 MHz
Error
-0.16
-0.16
-0.16
other Resets
—
—
—
—
%
Value on all
0000 -010
-1-1 0-00
0000 0000
0000 0000
0000 -00x
(decimal)
SPBRG
value
103
51
12
—
—
—
—