PIC18F452-I/P Microchip Technology Inc., PIC18F452-I/P Datasheet - Page 208

• Manufacturer Part Number: PIC18F452-I/P
• Description: 40 PIN, 32 KB FLASH, 1536 RAM, 34 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F452-I/P

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 36
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 32K Bytes
• Ram Size: 1.5K 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

PIC18F2420/2520/4420/4520
EXAMPLE 18-1:
TABLE 18-2:
DS39631A-page 206
TXSTA
RCSTA
BAUDCON ABDOVF
SPBRGH
SPBRG
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the BRG.
For a device with F
Desired Baud Rate
Solving for SPBRGH:SPBRG:
Calculated Baud Rate
Error
Name
EUSART Baud Rate Generator Register, High Byte
EUSART Baud Rate Generator Register, Low Byte
CSRC
SPEN
Bit 7
REGISTERS ASSOCIATED WITH BAUD RATE GENERATOR
X
OSC
CALCULATING BAUD RATE ERROR
of 16 MHz, desired baud rate of 9600, Asynchronous mode, 8-bit BRG:
= F
= ((F
= ((16000000/9600)/64) – 1
= [25.042] = 25
= 16000000/(64 (25 + 1))
= 9615
= (Calculated Baud Rate – Desired Baud Rate)/Desired Baud Rate
= (9615 – 9600)/9600 = 0.16%
RCIDL
Bit 6
TX9
RX9
OSC
OSC
/(64 ([SPBRGH:SPBRG] + 1))
/Desired Baud Rate)/64) – 1
SREN
TXEN
Bit 5
—
SYNC
CREN
SCKP
Bit 4
Preliminary
ADDEN
SENDB
BRG16
Bit 3
BRGH
FERR
Bit 2
—
OERR
TRMT
WUE
Bit 1
 2004 Microchip Technology Inc.
ABDEN
RX9D
TX9D
Bit 0
Reset Values
on page
51
51
51
51
51