PIC18F14K22LIN Datasheet, PDF (10/62 Pages) Microchip Technology – 20-Pin Flash Microcontrollers 20-Pin Flash Microcontrollers

PIC18F14K22LIN
EXAMPLE 1-1:
TYPICAL PIC18F14K22LIN APPLICATION
+12
RTP⁽³⁾
43V⁽³⁾
CF ⁽¹⁾
VBB
VREG
VDD
FAULT/TXE
I/O
LBUS
VSS
VSS
CG
Master Node Only
+12
1 k
27V ⁽²⁾
LIN Bus
Note 1: CF is the filter capacitor for the external voltage supply.
2: Transient suppressor diode. VCLAMP L = 27V.
3: These components are required for additional load dump protection above 43V.
1.2 Software
Please refer to the sections of this data sheet to deter-
mine what facilities have changed and what register
values need to be properly initialized. Failure to follow
these guidelines may result in improper operation.
1.2.1 TYPICAL INITIALIZATION CODE
InitialiseIOports
MOVLB 0xF
MOVLW 0x04
ANDWF ANSELH,f
MOVLW 0xC0
IORWF TRISB,f
MOVLW 0xCF
ANDWF TRISB,f
BSF
LINCS
MOVLW 0x80
IORWF TRISC,f
RETURN
;point the F bank
;disable AN8:9,11
;PORTB7:6 must be inputs
;PORTB5:4 must be outputs
;Chip Select Transceiver
;PORTC7 is an input
SetupLINUSART
MOVLB
MOVLW
MOVWF
MOVLW
MOVWF
0x0F
B'10010000'
RCSTA
B'00000100'
TXSTA
;Register Bank 0xF
;UART enabled,8-bit,continuous receive
;8-bit, asynchronous, high-baudrate
DS41580A-page 10
Preliminary
 2011 Microchip Technology Inc.